List of critically endangered plants
Topic: Biology
From HandWiki - Reading time: 28 min
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As of December 2023, the International Union for Conservation of Nature (IUCN) lists 5702 plant species categorized as Critically Endangered, including 569 which are tagged as possibly extinct and 48 possibly extinct in the wild.[1][2] 8.6% of all evaluated plant species are listed as critically endangered. The IUCN also lists 284 subspecies and varieties as critically endangered.
Additionally 5371 plant species (8.1% of those evaluated) are listed as data deficient, meaning there is insufficient information for a full assessment of conservation status. As these species typically have small distributions and/or populations, they are intrinsically likely to be threatened, according to the IUCN.[3] While the category of data deficient indicates that no assessment of extinction risk has been made for the taxa, the IUCN notes that it may be appropriate to give them "the same degree of attention as threatened taxa, at least until their status can be assessed."[4]
This is a complete list of critically endangered plant species, subspecies and varieties evaluated by the IUCN. Species considered possibly extinct by the IUCN are marked as such.
- Galaxaura barbata (possibly extinct)
- Gracilaria skottsbergii
- Laurencia oppositocladia
- Myriogramme kylinii
- Phycodrina elegans (possibly extinct)
- Schizymenia ecuadoreana
Bryophytes
There are 23 bryophyte species assessed as critically endangered.
- Bazzania bhutanica
- Bryopteris gaudichaudii
- Drepanolejeunea senticosa
- Geothallus tuberosus
- Kurzia sinensis
- Myriocolea irrorata
- Phycolepidozia exigua
- Schistochila undulatifolia
- Sphaerolejeunea umbilicata
- Spruceanthus theobromae
- Vandiemenia ratkowskiana
Pteridophytes
There are 67 species and three varieties of pteridophyte assessed as critically endangered.
There are 54 species and three varieties in the class Polypodiopsida assessed as critically endangered.
There are 49 species and three varieties in the order Polypodiales assessed as critically endangered.
- Asplenium complanatum
- Asplenium daghestanicum, Dagestanian spleenwort
- Asplenium dielerectum, Asplenium-diellia
- Asplenium dielfalcatum
- Asplenium diellaciniatum
- Asplenium dielmannii
- Asplenium dielpallidum
- Asplenium haughtonii, Barn fern
- Asplenium schizotrichum
- Asplenium unisorum
Species
- Ctenitis pallatangana (possibly extinct)
- Ctenitis squamigera, Pacific lacefern
- Dryopteris cognata, Large kidney fern
- Elaphoglossum actinolepis
- Elaphoglossum angamarcanum
- Elaphoglossum bonapartii
- Elaphoglossum chodatii
- Elaphoglossum christii
- Elaphoglossum cladotrichium
- Elaphoglossum corazonense
- Elaphoglossum dimorphum, Toothed tongue-fern
- Elaphoglossum gossypinum
- Elaphoglossum gracilipes (possibly extinct)
- Elaphoglossum jamesonii
- Elaphoglossum longissimum
- Elaphoglossum nervosum, Veined tongue-fern
- Elaphoglossum pellucidum
- Elaphoglossum polytrichum (possibly extinct)
- Elaphoglossum pteropodum
- Elaphoglossum sodiroi
- Elaphoglossum sprucei
- Elaphoglossum trichophorum
- Lastreopsis subrecedens
- Polystichum drepanum, Madeira shield-fern
Varieties
- Dryopteris crinalis var. podosorus
- Dryopteris glabra var. flynnii
- Dryopteris glabra var. pusilla
- Platycerium grande, Giant Staghorn Fern
Other Polypodiales species
- Adenophorus periens (possibly extinct)
- Anogramma ascensionis, Ascension Island parsley fern
- Athyrium rondoense
- Blotiella coriacea (possibly extinct)
- Cystoathyrium chinense
- Diplazium molokaiense
- Diplazium ulugurense (possibly extinct)
- Doryopteris angelica
- Melpomene brevipes (possibly extinct)
- Polypodium abitaguae
- Pteris adscensionis
- Pteris lidgatei
- Sadleria wagneriana
- Thelypteris bonapartii
- Xiphopteris ascensionensis
- Hymenophyllum contractile
- Hymenophyllum helicoideum
- Hymenophyllum tenerum
- Trichomanes fulgens
- Marsilea fadeniana
- Isoetes dispora
- Isoetes heldreichii, Pindus quillwort (possibly extinct)
- Isoetes hewitsonii
- Isoetes malinverniana, Piedmont quillwort
- Isoetes nigroreticulata
- Isoetes olympica, Olympic quillwort
- Isoetes sinensis (possibly extinct)
- Isoetes stephansenii
- Isoetes taiwanensis
- Isoetes wormaldii
Other pteridophyte species
There are 81 species, five subspecies, and 13 varieties of gymnosperm assessed as critically endangered.
Species
- Ceratozamia euryphyllidia
- Ceratozamia fuscoviridis
- Ceratozamia huastecorum
- Ceratozamia kuesteriana
- Ceratozamia miqueliana
- Ceratozamia zaragozae
- Ceratozamia zoquorum
- Cycas annaikalensis
- Cycas chamaoensis
- Cycas curranii, Curran's pitogo
- Cycas debaoensis
- Cycas fugax (possibly extinct)
- Cycas hongheensis
- Cycas pachypoda
- Cycas szechuanensis
- Cycas tansachana
- Cycas wadei, Wade's pitogo
- Cycas zambalensis
- Encephalartos aemulans, Ngotshe cycad
- Encephalartos cerinus, Waxen cycad (possibly extinct)
- Encephalartos cupidus, Blyde river cycad
- Encephalartos dolomiticus, Wolkberg cycad
- Encephalartos dyerianus, Lillie cycad
- Encephalartos equatorialis
- Encephalartos heenanii, Heenan's cycad
- Encephalartos hirsutus, Venda cycad (possibly extinct)
- Encephalartos inopinus, Lydenburg cycad (possibly extinct)
- Encephalartos kanga, Mnanasi Pori
- Encephalartos laevifolius, Kaapsehoop cycad
- Encephalartos latifrons, Albany cycad
- Encephalartos middelburgensis, Middelburg cycad
- Encephalartos msinganus, Msinga cycad
- Encephalartos pterogonus, Toothed-cone cycad
- Encephalartos sclavoi, Sclavo's cycad
- Encephalartos whitelockii
- Microcycas calocoma
- Zamia amplifolia
- Zamia disodon
- Zamia gentryi
- Zamia hymenophyllidia
- Zamia inermis
- Zamia macrochiera
- Zamia montana
- Zamia monticola
- Zamia prasina
- Zamia purpurea
- Zamia pygmaea
- Zamia restrepoi
- Zamia spartea
- Zamia urep
- Zamia vazquezii, Little chamal
- Zamia wallisii
Subspecies
- Cycas szechuanensis subsp. fairylakea
- Cycas szechuanensis subsp. szechuanensis
- Encephalartos tegulaneus subsp. powysii
Species
- Abies beshanzuensis, Baishan fir
- Abies nebrodensis, Sicilian fir
- Abies numidica, Algerian fir
- Abies yuanbaoshanensis, Yuanbaoshan fir
- Acmopyle sahniana
- Agathis montana, Mount Panié kauri
- Araucaria angustifolia, Parana pine
- Araucaria nemorosa
- Dacrydium guillauminii
- Glyptostrobus pensilis, Chinese swamp cypress
- Juniperus bermudiana, Bermuda cedar
- Juniperus saxicola
- Libocedrus chevalieri
- Pherosphaera fitzgeraldii
- Picea koyamae, Koyama's spruce
- Picea neoveitchii, Veitch's spruce
- Pinus cernua
- Pinus squamata
- Pinus torreyana, Torrey pine
- Podocarpus costaricensis
- Podocarpus decumbens
- Podocarpus palawanensis
- Podocarpus perrieri (possibly extinct)
- Podocarpus urbanii, Blue mountain yacca
- Taxus floridana, Florida yew
- Torreya taxifolia, Florida nutmeg tree
- Widdringtonia cedarbergensis, Clanwilliam cedar
- Widdringtonia whytei, Mulanje cedar
- Wollemia nobilis, Wollemi pine
Subspecies
Varieties
- Amentotaxus argotaenia var. brevifolia
- Cupressus arizonica var. montana, San Pedro cypress
- Cupressus arizonica var. stephensonii, Cuyamaca cypress
- Cupressus chengiana var. jiangeensis
- Cupressus dupreziana var. atlantica, Atlas cypress
- Cupressus dupreziana var. dupreziana
- Cupressus goveniana var. abramsiana
- Juniperus barbadensis var. barbadensis, Barbados cedar
- Juniperus deppeana var. sperryi
- Juniperus gracilior var. ekmanii
- Picea asperata var. ponderosa
- Pinus massoniana var. hainanensis
- Podocarpus sellowii var. angustifolius
There are 1895 species, 78 subspecies, and 49 varieties of dicotyledon assessed as critically endangered.
Species
- Peperomia albovittata
- Peperomia cordilimba
- Peperomia dauleana (possibly extinct)
- Peperomia glandulosa
- Peperomia guayaquilensis
- Peperomia leucorrhachis
- Peperomia litana
- Peperomia micromerioides
- Peperomia mitchelioides
- Peperomia parvilimba
- Peperomia peploides
- Peperomia petraea (possibly extinct)
- Peperomia pichinchae
- Peperomia pululaguana
- Peperomia stenostachya
- Peperomia tablahuasiana
- Piper angamarcanum
- Piper baezanum
- Piper bullatifolium
- Piper clathratum
- Piper entradense
- Piper eustylum
- Piper gualeanum
- Piper guayasanum
- Piper hydrolapathum
- Piper manabinum
- Piper mexiae
- Piper molliusculum (possibly extinct)
- Piper platylobum
- Piper poscitum
- Piper stipulosum
- Piper subnitidifolium
- Piper trachyphyllum
- Piper wibomii
Varieties
- Piper amalago var. variifolium
Campanulales
There are 62 species and 12 subspecies in Campanulales assessed as critically endangered.
Species
- Brighamia insignis
- Brighamia rockii
- Burmeistera asplundii
- Burmeistera rubrosepala
- Campanula aghrica, Aghrian bellflower
- Campanula kantschavelii, Kanchaveli's bellflower
- Campanula lazica, Lazian campanula
- Campanula seraglio, Serail bellflower
- Campanula troegerae
- Centropogon albostellatus
- Centropogon brachysiphoniatus (possibly extinct)
- Centropogon cazaletii
- Centropogon pilalensis
- Centropogon solisii
- Centropogon uncinatus
- Clermontia peleana
- Clermontia pyrularia, Pear clermontia
- Cyanea acuminata, Honolulu cyanea
- Cyanea asarifolia
- Cyanea asplenifolia
- Cyanea calycina
- Cyanea crispa
- Cyanea dunbariae
- Cyanea gibsonii
- Cyanea glabra
- Cyanea grimesiana
- Cyanea hamatiflora
- Cyanea horrida
- Cyanea humboldtiana
- Cyanea kolekoleensis (possibly extinct)
- Cyanea konahuanuiensis
- Cyanea kuhihewa
- Cyanea lobata
- Cyanea longiflora
- Cyanea magnicalyx
- Cyanea mannii
- Cyanea marksii, Mark's cyanea
- Cyanea mceldowneyi
- Cyanea platyphylla
- Cyanea procera, Haha
- Cyanea remyi
- Cyanea rivularis
- Cyanea shipmanii
- Cyanea stictophylla
- Cyanea st.-johnii, St John's rollandia
- Cyanea truncata, Punaluu cyanea
- Cyanea undulata
- Delissea kauaiensis
- Delissea rhytidosperma (possibly extinct in the wild)
- Delissea takeuchii (possibly extinct)
- Delissea waianaeensis
- Lobelia gaudichaudii
- Lobelia koolauensis
- Lobelia monostachya
- Lobelia oahuensis
- Muehlbergella oweriniana, Owerin's muchlenbergella
- Sclerotheca viridiflora
- Siphocampylus loxensis (possibly extinct)
- Siphocampylus uncipes
- Trematolobelia singularis
- Wahlenbergia linifolia, Large bellflower
- Wahlenbergia malaissei
Subspecies
- Clermontia oblongifolia subsp. brevipes, Oahu clermontia
- Clermontia oblongifolia subsp. mauiensis
- Clermontia peleana subsp. peleana
- Clermontia peleana subsp. singuliflora
- Clermontia samuelii subsp. hanaensis
- Clermontia samuelii subsp. samuelii
- Cyanea grimesiana subsp. grimesiana
- Cyanea grimesiana subsp. obatae
- Cyanea hamatiflora subsp. carlsonii
- Cyanea hamatiflora subsp. hamatiflora
- Cyanea lobata subsp. baldwinii
- Cyanea lobata subsp. lobata
- Aristolochia utriformis
- Aristolochia westlandii
- Asarum gusk
- Asarum monodoriflorum
- Asarum okinawense
- Asarum pellucidum
- Asarum tabatanum
- Pararistolochia preussii, synonym of Aristolochia preussii
There are 295 species and 23 subspecies in Theales assessed as critically endangered.
Species
- Anisoptera curtisii
- Anisoptera megistocarpa
- Anisoptera reticulata
- Cotylelobium lewisianum
- Cotylelobium scabriusculum
- Dipterocarpus applanatus
- Dipterocarpus baudii
- Dipterocarpus bourdilloni
- Dipterocarpus chartaceus
- Dipterocarpus concavus
- Dipterocarpus coriaceus
- Dipterocarpus cornutus
- Dipterocarpus costulatus
- Dipterocarpus cuspidatus
- Dipterocarpus dyeri
- Dipterocarpus elongatus
- Dipterocarpus eurynchus
- Dipterocarpus fagineus
- Dipterocarpus fusiformis
- Dipterocarpus glabrigemmatus
- Dipterocarpus glandulosus
- Dipterocarpus globosus
- Dipterocarpus gracilis
- Dipterocarpus grandiflorus (possibly extinct)
- Dipterocarpus hasseltii
- Dipterocarpus hispidus
- Dipterocarpus insignis
- Dipterocarpus kerrii
- Dipterocarpus kunstleri
- Dipterocarpus lamellatus
- Dipterocarpus littoralis
- Dipterocarpus lowii
- Dipterocarpus perakensis
- Dipterocarpus rigidus
- Dipterocarpus rotundifolius
- Dipterocarpus semivestitus
- Dipterocarpus tempehes
- Dipterocarpus turbinatus
- Dipterocarpus validus
- Dryobalanops fusca
- Dryobalanops keithii
- Hopea acuminata
- Hopea aequalis
- Hopea apiculata
- Hopea bancana
- Hopea basilanica
- Hopea beccariana
- Hopea bilitonensis
- Hopea brachyptera
- Hopea brevipetiolaris
- Hopea cagayanensis
- Hopea chinensis
- Hopea cordata
- Hopea coriacea
- Hopea depressinerva
- Hopea enicosanthoides
- Hopea erosa
- Hopea ferruginea
- Hopea glaucescens
- Hopea hainanensis
- Hopea helferi
- Hopea hongayanensis
- Hopea inexpectata
- Hopea jacobi
- Hopea johorensis
- Hopea kerangasensis
- Hopea latifolia
- Hopea malibato
- Hopea mengerawan
- Hopea micrantha
- Hopea mindanensis
- Hopea mollissima
- Hopea montana
- Hopea nervosa
- Hopea nigra
- Hopea nutans
- Hopea ovoidea
- Hopea pentanervia
- Hopea philippinensis
- Hopea plagata
- Hopea polyalthioides
- Hopea pubescens
- Hopea quisumbingiana
- Hopea reticulata
- Hopea samarensis
- Hopea sangal
- Hopea sphaerocarpa
- Hopea subalata
- Hopea wyattsmithii
- Parashorea aptera
- Parashorea lucida
- Parashorea malaanonan
- Parashorea stellata
- Shorea acuminata
- Shorea acuminatissima
- Shorea acuta
- Shorea almon
- Shorea asahii
- Shorea astylosa
- Shorea bakoensis
- Shorea balangeran
- Shorea blumutensis
- Shorea bullata
- Shorea carapae
- Shorea chaiana
- Shorea collina
- Shorea congestiflora
- Shorea conica
- Shorea contorta
- Shorea cordata
- Shorea cordifolia
- Shorea dealbata
- Shorea dispar (possibly extinct)
- Shorea elliptica
- Shorea falcata
- Shorea falciferoides
- Shorea farinosa
- Shorea flaviflora
- Shorea flemmichii
- Shorea foraminifera
- Shorea foxworthyi
- Shorea gardneri
- Shorea geniculata
- Shorea gibbosa
- Shorea guiso, Red balau
- Shorea hopeifolia
- Shorea hypochra
- Shorea hypoleuca
- Shorea iliasii
- Shorea inaequilateralis
- Shorea inappendiculata
- Shorea induplicata
- Shorea isoptera
- Shorea johorensis
- Shorea kuantanensis
- Shorea kudatensis
- Shorea kunstleri
- Shorea ladiana
- Shorea lamellata
- Shorea laxa
- Shorea lepidota
- Shorea leptoderma
- Shorea lissophylla
- Shorea longiflora
- Shorea longisperma
- Shorea lumutensis
- Shorea lunduensis
- Shorea macrantha
- Shorea macrobalanos
- Shorea malibato
- Shorea materialis
- Shorea megistophylla
- Shorea micans
- Shorea montigena
- Shorea mujongensis
- Shorea myrionerva
- Shorea negrosensis
- Shorea oblongifolia
- Shorea obovoidea
- Shorea ochrophloia
- Shorea ovalifolia
- Shorea pachyphylla
- Shorea palembanica
- Shorea pallescens
- Shorea pallidifolia
- Shorea palosapis
- Shorea peltata
- Shorea platycarpa
- Shorea polyandra
- Shorea polysperma
- Shorea praestans
- Shorea pubistyla
- Shorea resinosa
- Shorea revoluta
- Shorea rotundifolia
- Shorea rubella
- Shorea rugosa
- Shorea sagittata
- Shorea selanica
- Shorea seminis
- Shorea slootenii
- Shorea smithiana
- Shorea stipularis
- Shorea subcylindrica
- Shorea sumatrana
- Shorea superba
- Shorea symingtonii
- Shorea tenuiramulosa
- Shorea thorelii
- Shorea trapezifolia
- Shorea waltoni
- Shorea xanthophylla
- Shorea zeylanica
- Stemonoporus affinis
- Stemonoporus canaliculatus
- Stemonoporus elegans
- Stemonoporus gilimalensis
- Stemonoporus gracilis
- Stemonoporus lanceolatus
- Stemonoporus lancifolius
- Stemonoporus latisepalus
- Stemonoporus marginalis
- Stemonoporus moonii
- Stemonoporus nitidus
- Stemonoporus petiolaris
- Vateria indica
- Vateria macrocarpa
- Vateriopsis seychellarum
- Vatica affinis
- Vatica bella
- Vatica brevipes
- Vatica cauliflora
- Vatica chartacea
- Vatica chinensis
- Vatica compressa
- Vatica congesta
- Vatica coriacea
- Vatica cuspidata
- Vatica diospyroides
- Vatica elliptica
- Vatica flavida
- Vatica flavovirens
- Vatica globosa
- Vatica guangxiensis
- Vatica havilandii
- Vatica hullettii
- Vatica lanceaefolia
- Vatica lobata
- Vatica maingayi
- Vatica obovata
- Vatica pachyphylla
- Vatica parvifolia
- Vatica pentandra
- Vatica rhynchocarpa
- Vatica ridleyana
- Vatica rotata
- Vatica sarawakensis
- Vatica scortechinii
- Vatica soepadmoi
- Vatica teysmanniana
- Vatica venulosa
- Vatica xishuangbannaensis (possibly extinct)
Subspecies
- Anisoptera thurifera subsp. thurifera
- Dipterocarpus caudatus subsp. caudatus
- Dipterocarpus conformis subsp. conformis
- Hopea andersonii subsp. basalticola
- Hopea jucunda subsp. jucunda
- Hopea jucunda subsp. modesta
- Shorea assamica subsp. assamica
- Shorea assamica subsp. globifera
- Shorea assamica subsp. koordersii
- Shorea assamica subsp. philippinensis
- Shorea falciferoides subsp. falciferoides
- Shorea falciferoides subsp. glaucescens
- Shorea hemsleyana subsp. grandiflora
- Shorea hemsleyana subsp. hemsleyana
- Shorea macroptera subsp. macroptera
- Shorea macroptera subsp. sandakanensis
- Shorea ovalis subsp. sarawakensis
- Shorea ovalis subsp. sericea
- Shorea singkawang subsp. scabrosa
- Vatica javanica subsp. javanica
- Vatica javanica subsp. scaphifolia
- Vatica oblongifolia subsp. crassilobata
- Vatica oblongifolia subsp. elliptifolia
- Camellia azalea
- Camellia cupiformis
- Camellia fangchengensis
- Camellia fascicularis
- Camellia hekouensis
- Camellia ilicifolia
- Camellia impressinervis
- Camellia luteoflora
- Euryodendron excelsum
- Freziera euryoides
- Freziera forerorum
- Freziera inaequilatera
- Freziera roraimensis
- Freziera stuebelii
- Freziera subintegrifolia
- Freziera uniauriculata
- Freziera varibrateata
- Laplacea curtyana
- Ternstroemia bullata
- Ternstroemia glomerata
- Ternstroemia granulata
- Ternstroemia landae
- Ternstroemia luquillensis
- Ternstroemia subsessilis
Guttiferae
- Bonnetia ptariensis
- Calophyllum acutiputamen
- Calophyllum cuneifolium
- Garcinia cadelliana
- Garcinia tanzaniensis
- Hypericum fissurale, Cracked Saint John's wort
- Hypericum hartwegii
- Mesua manii
- Mesua stylosa
- Poeciloneuron pauciflorum
- Tovomita aequatoriensis
Other Theales species
- Asteropeia amblyocarpa
- Medusagyne oppositifolia, Jellyfish tree
- Ochna rufescens
- Ouratea elegans
- Rhaptopetalum breteleri
- Saurauia bogoriensis
- Saurauia punduana
Species
- Abutilon eremitopetalum, Hidden-petaled abutilon
- Abutilon menziesii
- Abutilon sandwicense, Greenflower Indian mallow
- Byttneria minytricha
- Carpodiptera mirabilis
- Cola cecidiifolia
- Cola metallica
- Cola nigerica
- Cola praeacuta
- Craigia kwangsiensis
- Dicellostyles axillaris
- Dombeya acutangula
- Dombeya ledermannii
- Elaeocarpus bojeri
- Elaeocarpus gaussenii
- Elaeocarpus integrifolius
- Hampea thespesioides
- Herrania laciniifolia
- Hibiscadelphus distans
- Hibiscadelphus giffardianus
- Hibiscadelphus hualalaiensis
- Hibiscus clayi, Clay's hibiscus
- Hibiscus fragilis
- Hildegardia populifolia
- Kokia drynarioides, Hawaiian tree cotton
- Kokia kauaiensis, Kauai koki'o
- Leptolaena delphinensis
- Leptolaena masoalensis
- Leptolaena raymondii
- Perrierodendron quartzitorum
- Pterospermum kingtungense
- Pterospermum menglunense
- Pterospermum yunnanense
- Quararibea jefensis
- Quararibea santaritensis
- Quararibea yunckeri
- Reevesia rotundifolia
- Sarcolaena grandiflora
- Sarcolaena humbertiana
- Sarcolaena isaloensis
- Sloanea shankii
- Trochetiopsis ebenus, Dwarf ebony
- Wercklea flavovirens
Subspecies
- Elaeocarpus submonoceras subsp. oliganthus
- Hibiscus waimeae subsp. hannerae
Varieties
- Bombax insigne var. polystemon
- Erodium astragaloides
- Erodium hendrikii, Heron's bill
- Erodium sosnowskianum, Sosonovskiy's heron's-bill
- Geranium antisanae
- Geranium arboreum
- Geranium kauaiense
- Geranium maderense
- Impatiens adenioides
- Impatiens angustisepala
- Impatiens bururiensis
- Impatiens gordonii, Seychelles bizzie lizzie
- Impatiens grandisepala
- Oxalis natans
- Oxalis norlindiana
- Oxalis uliginosa
- Pelargonium cotyledonis, Old father live forever
- Pelargonium insularis
- Tropaeolum umbellatum
Species
Subspecies
- Eschweilera piresii subsp. viridipetala
Polygalales
Species
- Malpighia proctorii
- Polygala helenae
- Polygala quitensis (possibly extinct)
- Polygala sinisica
- Pteromonnina fosbergii
- Stigmaphyllon nudiflorum
- Triaspis schliebenii (possibly extinct)
- Vochysia aurifera
Subspecies
- Byrsonima nemoralis subsp. dressleri
Species
- Agelanthus rondensis (possibly extinct)
- Dendropemon caymanensis
- Exocarpos luteolus
- Kunkeliella psilotoclada (possibly extinct)
- Kunkeliella subsucculenta
- Olax psittacorum
- Phoradendron aequatoris
- Taxillus wiensii
Varieties
- Santalum insulare var. margaretae
- Santalum insulare var. raivavense
Family Proteaceae - 103 species
- Adenanthos detmoldii
- Adenanthos dobagii
- Banksia anatona
- Banksia aurantia
- Banksia brownii
- Banksia cuneata
- Banksia fuscobractea
- Banksia montana
- Banksia prionophylla
- Banksia rosserae
- Banksia verticillata
- Banksia vincentia
- Diastella buekii
- Diastella parilis
- Eidothea hardeniana
- Faurea lucida
- Grevillea angustiloba
- Grevillea asparagoides
- Grevillea asteriscosa
- Grevillea caleyi
- Grevillea calliantha
- Grevillea curviloba
- Grevillea divaricata (possibly extinct)
- Grevillea eriobotrya
- Grevillea fuscolutea
- Grevillea humifusa
- Grevillea iaspicula
- Grevillea incurva
- Grevillea involucrata
- Grevillea lullfitzii
- Grevillea maccutcheonii
- Grevillea marriottii
- Grevillea maxwellii
- Grevillea obtusifolia
- Grevillea pinifolia
- Grevillea pythara
- Grevillea rara
- Grevillea rosieri
- Grevillea scapigera
- Grevillea scortechinii
- Grevillea squiresiae
- Grevillea tenuiloba
- Grevillea wilkinsonii
- Hakea aenigma
- Hakea ilicifolia
- Hakea pulvinifera
- Helicia peekelii
- Helicia peltata
- Helicia retusa
- Isopogon fletcheri
- Isopogon robustus
- Isopogon uncinatus
- Lambertia fairallii
- Leucadendron bonum
- Leucadendron chamelaea
- Leucadendron flexuosum
- Leucadendron globosum
- Leucadendron immoderatum
- Leucadendron levisanus
- Leucadendron macowanii
- Leucadendron tradouwense
- Leucadendron verticillatum
- Leucospermum arenarium
- Leucospermum fulgens
- Leucospermum harpagonatum
- Mimetes stokoei
- Panopsis hernandezii
- Panopsis magnifructa
- Persoonia acerosa
- Persoonia arborea
- Persoonia bargoensis
- Persoonia brevirhachis
- Persoonia flexifolia
- Persoonia micranthera
- Persoonia pauciflora
- Persoonia pungens
- Persoonia rufiflora
- Persoonia saccata
- Persoonia striata
- Persoonia stricta
- Persoonia trinervis
- Protea holosericea
- Protea inopina
- Protea namaquana
- Protea nubigena
- Protea odorata
- Roupala tobagensis
- Serruria aemula
- Serruria flava
- Serruria florida
- Serruria furcellata
- Serruria lacunosa
- Serruria pinnata
- Serruria scoparia
- Serruria trilopha
- Sorocephalus crassifolius
- Sorocephalus imbricatus
- Sorocephalus palustris
- Sorocephalus scabridus
- Synaphea nexosa
- Synaphea odocoileops
- Synaphea quartzitica
- Synaphea stenoloba
Family Sabiaceae - 5 species
- Meliosma caucana
- Meliosma lindae
- Meliosma nanarum
- Meliosma nesites
- Meliosma seleriana
- Centranthus amazonum
- Cephalaria anatolica, Anatolian cephalaria
- Lonicera karataviensis
- Nardostachys jatamansi
- Valeriana leschenaultii
- Viburnum divaricatum (possibly extinct)
- Viburnum hondurense
- Viburnum molinae
- Viburnum subpubescens
- Armeria berlengensis
- Armeria helodes
- Limonium calabrum
- Limonium dendroides
- Limonium sibthorpianum
- Limonium spectabile
- Limonium sventenii
Rubiales
Species
- Arachnothryx chimboracensis
- Belonophora ongensis
- Chassalia capitata
- Chassalia laikomensis
- Coprosma laevigata, Rarotongan coprosma
- Diplospora erythrospora
- Exostema orbiculatum
- Gaertnera hirtiflora
- Gaertnera longifolia
- Gaertnera truncata
- Gardenia anapetes
- Gardenia brighamii, Hawaiian gardenia
- Gardenia candida
- Gardenia mannii, Mann's gardenia
- Gardenia vitiensis
- Gonzalagunia bifida
- Gonzalagunia dodsonii
- Gonzalagunia mollis
- Guettarda longiflora
- Hymenodictyon seyrigii (possibly extinct)
- Ixora johnsonii
- Kadua coriacea
- Kadua degeneri
- Kadua flynnii
- Kadua haupuensis (possibly extinct in the wild)
- Kadua laxiflora
- Kadua parvula
- Kadua st-johnii
- Keetia bakossii
- Ladenbergia rubiginosa
- Lasianthus rhinophyllus
- Machaonia woodburyana
- Manettia canescens (possibly extinct)
- Manettia holwayi (possibly extinct)
- Manettia nebulosa
- Nauclea gageana
- Nesohedyotis arborea, St Helena dogwood
- Oxyanthus okuensis
- Pavetta kupensis
- Pavetta rubentifolia
- Pentagonia orthoneura (possibly extinct)
- Pentagonia peruviana
- Portlandia albiflora
- Prismatomeris andamanica
- Psathura sechellarum
- Psychotria bimbiensis
- Psychotria bryonicola
- Psychotria danceri
- Psychotria grantii
- Psychotria hanoverensis
- Psychotria minimicalyx
- Psychotria moliwensis
- Psychotria moseskemei
- Psychotria silhouettae
- Psychotria sodiroi
- Psychotria speciosa
- Psychotria tahitensis
- Psychotria trichocalyx
- Psychotria whistleri, Rarotonga psychotria
- Ramosmania rodriguesi
- Rondeletia anguillensis
- Rondeletia buxifolia, Pribby
- Rondeletia cincta
- Rothmannia annae, Wright's gardenia
- Simira standleyi
- Stelechantha arcuata
- Stenostomum tomentosum
- Tarenna hutchinsonii
- Timonius jambosella
- Tinadendron noumeanum
- Wendlandia andamanica
Subspecies
- Ixora scheffleri subsp. keniensis
- Kadua cordata subsp. remyi
- Kadua degeneri subsp. coprosmifolia
- Kadua degeneri subsp. degeneri
Varieties
- Chassalia coriacea var. johnstonii
- Coprosma rapensis var. benefica, Red berry
Species
- Banara caymanensis
- Banara vanderbiltii
- Casearia mauritiana
- Casearia staffordiae
- Casearia williamsiana
- Frankenia portulacifolia, St Helena tea plant
- Gloeospermum boreale
- Helianthemum bystropogophyllum
- Helianthemum teneriffae
- Hoplestigma pierreanum
- Isodendrion laurifolium
- Isodendrion pyrifolium
- Nasa ferox
- Rinorea marginata
- Rinorea maximiliani
- Viola amamiana
- Viola helenae
- Viola hispida
- Viola ucriana
- Viola utchinensis
- Xylosma capillipes
- Xylosma crenata
- Xylosma pachyphylla, Spiny logwood
- Xylosma peltata
- Xylosma pininsularis
- Xylosma serrata (possibly extinct)
Subspecies
- Cistus heterophyllus subsp. carthaginensis
- Viola chamissoniana subsp. chamissoniana
There are 74 species, two subspecies, and ten varieties in Euphorbiales assessed as critically endangered.
- Chaetocarpus pubescens
- Buxus vahlii, Vahl's boxwood
Species
- Acalypha ecuadorica
- Acalypha eggersii
- Acalypha raivavensis
- Agrostistachys hookeri
- Amanoa anomala
- Aporosa fusiformis
- Aristogeitonia gabonica
- Claoxylon linostachys
- Cleidion lemurum
- Cleistanthus major
- Cleistanthus robustus
- Croton lawianus
- Croton macrocarpus
- Croton vaughanii
- Crotonogyne impedita
- Ditaxis macrantha
- Drypetes riseleyi
- Drypetes tessmanniana
- Euphorbia alcicornis (possibly extinct)
- Euphorbia ankazobensis
- Euphorbia berorohae
- Euphorbia boinensis (possibly extinct)
- Euphorbia capmanambatoensis
- Euphorbia cap-saintemariensis
- Euphorbia deppeana
- Euphorbia eleanoriae
- Euphorbia francoisii
- Euphorbia geroldii
- Euphorbia halemanui
- Euphorbia heleniana, French grass
- Euphorbia herbstii
- Euphorbia iharanae
- Euphorbia kondoi
- Euphorbia labatii
- Euphorbia margalidiana
- Euphorbia millotii
- Euphorbia neospinescens (possibly extinct)
- Euphorbia origanoides, Ascension spurge
- Euphorbia pachypodioides
- Euphorbia parvicyathophora
- Euphorbia pirahazo (possibly extinct)
- Euphorbia quitensis
- Euphorbia razafindratsirae
- Euphorbia remyi
- Euphorbia robivelonae
- Euphorbia rockii
- Euphorbia stygiana
- Euphorbia tanaensis
- Euphorbia tulearensis
- Flueggea elliptica
- Flueggea neowawraea
- Glochidion chodoense
- Glochidion papenooense
- Hieronyma crassistipula
- Koilodepas ferrugineum
- Macaranga raivavaeensis
- Ostodes minor
- Phyllanthus caesiifolius
- Phyllanthus millei
- Phyllanthus nyale
- Phyllanthus pindaiensis
- Phyllanthus revaughanii
- Podadenia thwaitesii
- Pseudoglochidion anamalayanum
- Sauropus assimilis
- Sauropus elegantissimus
- Sebastiania crenulata
- Sebastiania howardiana
- Tetrorchidium microphyllum
- Trigonostemon cherrieri
- Victorinia regina, synonym of Cnidoscolus regina
Subspecies
- Euphorbia cylindrifolia subsp. tuberifera
- Euphorbia stenoclada subsp. ambatofinandranae
Varieties
- Drypetes usambarica var. rugulosa
- Euphorbia decaryi var. robinsonii
- Euphorbia francoisii var. francoisii
- Euphorbia greenwayi var. greenwayi
- Euphorbia lophogona var. tenuicaulis
- Euphorbia remyi var. kauaiensis
- Euphorbia remyi var. remyi
- Phyllanthus aeneus var. papillosus
- Sebastiania lesteri var. glabrata
- Sebastiania lesteri var. lesteri
There are 40 species in the order Laurales assessed as critically endangered.
- Actinodaphne cuspidata
- Actinodaphne lanata
- Aniba pedicellata
- Aspidostemon caudatus
- Aspidostemon inconspicuus (possibly extinct)
- Aspidostemon litoralis
- Aspidostemon synandra
- Aspidostemon triantherus
- Aspidostemon trichandra
- Beilschmiedia penangiana
- Beilschmiedia preussii
- Cinnamomum kotoense
- Cinnamomum rivulorum
- Cinnamomum walaiwarense
- Cryptocarya elliptifolia
- Cryptocarya ferrarsii
- Dehaasia acuminata
- Dehaasia chatacea
- Dehaasia pugerensis
- Hexapora curtisii
- Litsea scortechinii
- Nectandra caudatoacuminata
- Nectandra debilis
- Nectandra minima
- Nectandra pulchra
- Ocotea harrisii
- Ocotea lancilimba
- Ocotea monteverdensis
- Ocotea pachypoda
- Pleurothyrium roberto-andinoi
Species
- Begonia asympeltata
- Begonia minuta
- Begonia montis-elephantis
- Begonia salaziensis
- Begonia stellata
Subspecies
- Begonia quadrialata subsp. dusenii
There are 46 species in Ebenales assessed as critically endangered.
- Aubregrinia taiensis
- Autranella congolensis
- Chrysophyllum claraense
- Chrysophyllum durifructum
- Chrysophyllum euryphyllum
- Chrysophyllum superbum
- Leptostylis goroensis
- Madhuca boerlageana
- Manilkara gonavensis
- Manilkara spectabilis
- Micropholis caudata
- Micropholis grandiflora
- Micropholis macrophylla
- Palaquium laevifolium
- Pouteria capacifolia
- Pouteria cinnamomea
- Pouteria espinae
- Pouteria euryphylla
- Pouteria gigantea
- Pouteria pachycalyx
- Pouteria pallens
- Pouteria polysepala
- Pouteria subsessilifolia
- Pradosia decipiens
- Pradosia verrucosa
- Sideroxylon retinerve
- Sideroxylon rubiginosum
- Synsepalum brenanii
- Diospyros angulata
- Diospyros benstonei
- Diospyros chrysophyllos
- Diospyros crumenata
- Diospyros egrettarum
- Diospyros hemiteles
- Diospyros katendei (possibly extinct)
- Diospyros lolinopsis
- Diospyros molissima
- Diospyros moonii
- Diospyros mun
- Diospyros nodosa
- Diospyros rheophytica
- Diospyros vaccinioides, Small persimmon
- Diospyros veillonii
There are 29 species and two subspecies in the order Celastrales assessed as critically endangered.
- Grisollea thomassetii
- Pennantia baylisiana, Three kings kaikomako
- Urandra apicalis
Species
Subspecies
- Ilex perado subsp. iberica
- Ilex perado subsp. lopezlilloi
- Bhesa nitidissima
- Bhesa sinica
- Cassine koordersii
- Euonymus pallidifolia
- Maytenus eggersii
- Maytenus harrisii
- Maytenus manabiensis (possibly extinct)
- Maytenus williamsii
- Platypterocarpus tanganyikensis
- Pristimera biholongii
- Pristimera breteleri
- Salacia conraui
- Salacia villiersii
- Simirestis klaineana
- Simirestis staudtii
- Tontelea hondurensis
- Dichapetalum korupinum
- Dichapetalum letouzeyi
There are 97 species and five varieties in the order Myrtales assessed as critically endangered.
Species
- Calycorectes schottianus
- Calyptranthes acutissima
- Calyptranthes arenicola
- Calyptranthes flavo-viridis
- Calyptranthes kiaerskovii
- Calyptranthes pozasiana
- Calyptranthes uniflora
- Eucalyptus recurva, Mongarlowe mallee
- Eugenia aboukirensis
- Eugenia acutissima
- Eugenia albida (possibly extinct)
- Eugenia arianae
- Eugenia bojeri
- Eugenia camptophylla
- Eugenia coyolensis
- Eugenia crassipetala
- Eugenia gageana
- Eugenia gilgii
- Eugenia guayaquilensis (possibly extinct)
- Eugenia hanoverensis
- Eugenia hastilis
- Eugenia insignis
- Eugenia kameruniana
- Eugenia kellyana
- Eugenia klossii
- Eugenia lancetillae
- Eugenia polypora
- Eugenia rendlei
- Eugenia rheophytica
- Eugenia scalarinervis
- Eugenia scheffleri (possibly extinct)
- Eugenia singampattiana
- Eugenia sp. 'lepredourii'
- Eugenia vaughanii
- Eugenia woodburyana
- Meteoromyrtus wynaadensis
- Metrosideros bartlettii, Bartlett's Rata
- Mitranthes macrophylla
- Myrcia paganii
- Myrcianthes ferreyrae
- Myrtus claraensis
- Plinia rupestris
- Psidium sintenisii
- Syzygium ampliflorum
- Syzygium andamanicum
- Syzygium courtallense
- Syzygium cyclophyllum
- Syzygium guehoi
- Syzygium manii
- Syzygium palghatense
- Syzygium phaeophyllum
- Syzygium phyllyraeoides
- Syzygium sylvestre
- Syzygium travancoricum
- Xanthostemon glaucus
Varieties
- Eugenia harrisii var. grandifolia
- Myrrhinium atropurpureum var. atropurpureum
- Adelobotrys panamensis
- Astronidium floribundum
- Astronidium inflatum
- Astronidium kasiense
- Astronidium lepidotum
- Astronidium pallidiflorum
- Astronidium saulae
- Blakea granatensis
- Clidemia ecuadorensis
- Henriettea granularis
- Henriettea membranifolia
- Lijndenia brenanii (possibly extinct)
- Memecylon arnottianum
- Memecylon bakossiense
- Memecylon buxoides
- Memecylon elegantulum
- Memecylon gardneri
- Memecylon myrtiforme
- Memecylon orbiculare
- Memecylon rhinophyllum
- Memecylon sisparense
- Meriania versicolor
- Miconia benoistii
- Miconia leandroides
- Miconia littlei
- Miconia longisetosa (possibly extinct)
- Miconia scabra (possibly extinct)
- Tessmannianthus carinatus
- Warneckea cordiformis
- Warneckea ngutiensis
Species
- Combretum tenuipetiolatum
Varieties
- Terminalia eriostachya var. margaretiae, Black mastic
- Terminalia glabrata var. glabrata
- Terminalia glabrata var. koariki
- Aquilaria crassna
- Aquilaria rostrata
- Daphnopsis occulta
- Wikstroemia villosa, Hairy wikstroemia
Water caltrops
- Trapa colchica, Colchis water-chestnut
- Rotala malabarica
- Rotala robynsiana
- Sonneratia griffithii
- Sonneratia hainanensis, Hainan sonneratia
- Tetrataxis salicifolia
- Epilobium numidicum
There are 70 species, three subspecies, and five varieties in the order Sapindales assessed as critically endangered.
Species
- Calodendrum eickii
- Citrus taiwanica
- Decazyx esparzae
- Glycosmis crassifolia
- Halfordia papuana
- Melicope adscendens
- Melicope degeneri
- Melicope fatuhivensis
- Melicope haupuensis
- Melicope knudsenii, Knudsen's melicope
- Melicope lydgatei
- Melicope mucronulata
- Melicope quadrangularis, Four-angled pelea
- Melicope reflexa
- Melicope stonei
- Melicope zahlbruckneri, Zahlbruckner's melicope
- Oxanthera undulata
- Platydesma rostrata
- Ravenia swartziana
- Sarcomelicope glauca
- Spathelia coccinea
- Zanthoxylum heterophyllum
Subspecies
- Pilocarpus goudotianus subsp. heterochromus
Varieties
- Zanthoxylum dipetalum var. tomentosum
Species
- Acer hainanense
- Acer leipoense
Varieties
- Acer buergerianum var. formosanum, Taiwan trident maple
- Acer oblongum var. membranaceum
Species
- Alectryon macrococcus
- Allophylus hispidus
- Cupania riopalenquensis
- Gongrospermum philippinense
- Guioa grandifoliola
- Guioa hospita
- Guioa palawanica
- Guioa parvifoliola
- Guioa reticulata
- Podonephelium cristagalli
- Podonephelium parvifolium
- Podonephelium subaequilaterum
- Talisia bullata
- Zollingeria borneensis
Varieties
- Alectryon macrococcus var. auwahiensis
- Alectryon macrococcus var. macrococcus
- Tribulus rajasthanensis
- Zygophyllum bucharicum
- Zygophyllum darvasicum
- Buchanania barberi
- Campnosperma seychellarum
- Comocladia parvifoliola
- Dracontomelon macrocarpum
- Mangifera campnospermoides
- Micronychia benono
- Nothopegia aureo-fulva
- Nothopegia castanaefolia
- Operculicarya capuronii
- Poupartia borbonica
- Semecarpus ochracea
- Semecarpus pseudo-emarginata
- Sorindeia calantha
Species
- Aglaia densitricha
- Aglaia evansensis
- Aglaia gracilis
- Aglaia heterotricha
- Aglaia mackiana
- Aglaia malabarica
- Aglaia pleuropteris
- Aglaia unifolia
- Dysoxylum pachypodum
- Dysoxylum peerisi
- Guarea sprucei
- Trichilia florbranca
- Trichilia triacantha
- Turraea elephantina
- Walsura gardneri
Subspecies
- Trichilia trifolia subsp. pteleaefolia
- Turraea mombassana subsp. schliebenii
Species
- Achyrocline glandulosa
- Achyrocline mollis
- Aetheolaena hypoleuca (possibly extinct)
- Aetheolaena ledifolia (possibly extinct)
- Aetheolaena pichinchensis (possibly extinct)
- Andryala crithmifolia
- Anisopappus burundiensis (possibly extinct)
- Anthemis glaberrima
- Argyranthemum winteri
- Argyroxiphium kauense, Kau silversword
- Artemisia insipida
- Artemisia kauaiensis (possibly extinct)
- Aster quitensis (possibly extinct)
- Baccharis aretioides
- Baccharis fusca (possibly extinct)
- Bidens simplicifolia
- Bidens wiebkei
- Bothriocline auriculata
- Cadiscus aquaticus
- Calendula maritima, Sea marigold
- Centaurea akamantis, Akamas centaury
- Centaurea caroli-henrici, Karl-henrikh's centaury
- Centaurea corensis
- Centaurea demirizii, Demiriz's centaury
- Centaurea drabifolioides, Whitlow-grass-leaved centaury
- Centaurea heldreichii
- Centaurea leptophylla, Thin-leaved centaury
- Centaurea tamanianiae, Tamanyan's centaury
- Centaurea vavilovii, Vavilov's centaury
- Centaurodendron dracaenoides
- Centaurodendron palmiforme
- Cheirolophus crassifolius, Maltese centaury
- Cheirolophus duranii
- Cheirolophus metlesicsii
- Cheirolophus santos-abreui
- Cirsium davisianum
- Cirsium eliasianum
- Commidendrum robustum, Gumwood
- Commidendrum rotundifolium, Bastard gumwood
- Commidendrum spurium, False gumwood
- Cotula myriophylloides (possibly extinct)
- Cylindrocline commersonii
- Dasphyllum lehmannii
- Dendroseris berteroana
- Dendroseris gigantea
- Dendroseris litoralis
- Dendroseris macrantha
- Dendroseris macrophylla
- Dendroseris marginata
- Dendroseris micrantha
- Dendroseris neriifolia
- Dendroseris pinnata
- Dendroseris pruinata
- Dendroseris regia
- Dicoma pretoriensis (possibly extinct)
- Dubautia herbstobatae
- Dubautia kalalauensis
- Dubautia kenwoodii (possibly extinct)
- Dubautia latifolia
- Dubautia pauciflorula
- Egletes humifusa (possibly extinct)
- Elaphandra retroflexa (possibly extinct)
- Erigeron adscendens
- Faujasiopsis reticulata
- Fitchia cordata
- Gazania thermalis
- Gnaphalium sodiroi
- Gutenbergia pubescens
- Helichrysum artvinense, Artvinian everlasting
- Helichrysum melitense, Maltese everlasting
- Hesperomannia arborescens, Lanai hesperomannia
- Hesperomannia arbuscula, Maui hesperomannia
- Hesperomannia lydgatei, Kauai hesperomannia
- Hieracium debile
- Hieracium lucidum
- Hypochaeris oligocephala
- Jacobaea trapezuntina, Trapezuntian groundsel
- Jurinea akinfievii, Akinfiev's jurinea
- Jurinea fontqueri
- Lamyropsis microcephala
- Melanthera fauriei
- Melanthera kamolensis
- Melanthera micrantha
- Melanthera tenuifolia
- Melanthera waimeaensis
- Mikania andrei
- Mikania iserniana (possibly extinct)
- Mikania jamesonii
- Mikania seemannii (possibly extinct)
- Mikania stereolepis
- Mikania tafallana
- Monactis dubia
- Monarrhenus salicifolius
- Onopordum carduelium
- Onopordum nogalesii
- Pericallis hadrosoma
- Pericallis malvifolia
- Pladaroxylon leucadendron, He cabbage tree
- Podospermum grossheimii, Grossheimi's salsify
- Podospermum idae, Ida's salsify
- Psephellus adjaricus, Adjarian psephellus
- Psephellus avaricus, Awarian centaury
- Psephellus gracillimus
- Psiadia cataractae
- Pulicaria filaginoides
- Remya montgomeryi
- Saussurea costus
- Scalesia atractyloides
- Scalesia divisa
- Scalesia gordilloi
- Scorzonera ketzkhovelii, Ketskhoveli's salsify
- Scorzonera kozlowskyi, Kozlovskiy's salsify
- Senecio alboranicus
- Senecio lamarckianus
- Senecio navugabensis (possibly extinct)
- Sonchus araraticus, Araratian sow-thistle
- Sonchus erzincanicus
- Sonchus gandogeri
- Talamancalia putcalensis, synonym of Lomanthus putcalensis
- Tanacetum oshanahanii
- Tanacetum oxystegium, Sharp-stegium tansy
- Tetramolopium rockii
- Tragopogon makaschwilii, Makashvilis's goat's beard
- Tragopogon otschiaurii, Ochiauri's goat's beard
- Verbesina caymanensis
- Viguiera media
- Wedelia oxylepis
- Wilkesia hobdyi, Dwarf iliau
Subspecies
- Argyroxiphium sandwicense subsp. sandwicense, Mauna Kea silversword
- Bidens campylotheca subsp. pentamera
- Bidens campylotheca subsp. waihoiensis
- Bidens micrantha subsp. ctenophylla
- Dubautia plantaginea subsp. humilis
- Dubautia plantaginea subsp. magnifolia
- Fitchia cuneata subsp. cuneata
- Melanthera micrantha subsp. exigua
- Melanthera micrantha subsp. micrantha
Varieties
- Bidens hendersonensis var. oenoensis
- Pectis caymanensis var. robusta
- Scalesia atractyloides var. atractyloides
- Scalesia atractyloides var. darwinii
- Tetramolopium rockii var. calcisabulorum
There are 63 species and three subspecies in the order Magnoliales assessed as critically endangered.
Species
- Magnolia calimaensis
- Magnolia canandeana
- Magnolia cararensis
- Magnolia cespedesii
- Magnolia chimantensis
- Magnolia colombiana
- Magnolia coronata
- Magnolia crassifolia
- Magnolia dixonii (possibly extinct)
- Magnolia domingensis
- Magnolia ekmanii
- Magnolia emarginata (possibly extinct)
- Magnolia espinalii
- Magnolia fansipanensis
- Magnolia faustinomirandae
- Magnolia grandis
- Magnolia gustavii
- Magnolia jardinensis
- Magnolia katiorum
- Magnolia lacandonica
- Magnolia longipedunculata
- Magnolia manguillo
- Magnolia mayae
- Magnolia narinensis
- Magnolia ofeliae
- Magnolia omeiensis
- Magnolia ovoidea
- Magnolia pleiocarpa
- Magnolia polyhypsophylla
- Magnolia sanchez-vegae
- Magnolia sinica
- Magnolia tiepii
- Magnolia vallartensis
- Magnolia virolinensis
- Magnolia wendtii
- Magnolia wolfii (possibly extinct in the wild)
- Magnolia zenii
Subspecies
- Magnolia cubensis subsp. acunae
- Magnolia virginiana subsp. oviedoae
Species
- Alphonsea kingii
- Annona ecuadorensis
- Annona hystricoides
- Annona manabiensis
- Desmopsis dolichopetala
- Duguetia peruviana
- Fissistigma tungfangense
- Mezzettia herveyana
- Monodora hastipetala
- Orophea yunnanensis
- Polyalthia glabra
- Polyalthia hirtifolia
- Polyalthia lancilimba
- Popowia pauciflora
- Popowia velutina
- Rollinia helosioides
- Uvaria decidua (possibly extinct)
- Uvaria manjensis
- Uvaria puguensis
- Xylopia amplexicaulis
- Xylopia lamarckii
Subspecies
- Artabotrys modestus subsp. modestus
Capparales
There are 30 species and one variety in Capparales assessed as critically endangered.
- Cadaba insularis
- Capparis mirifica
- Capparis panamensis
- Podandrogyne trichopus
- Steriphoma urbani (possibly extinct)
Cruciferae
Species
- Aethionema retsina
- Arabis kennedyae, Troodos rockcress
- Biscutella rotgesii
- Brassica macrocarpa
- Coronopus navasii
- Crambe feuillei
- Crambe sventenii
- Crambe tamadabensis
- Crambe wildpretii
- Diplotaxis siettiana
- Diplotaxis vicentina
- Draba ecuadoriana
- Draba narmanensis, Narmanian whitlow-grass
- Draba violacea
- Erucastrum palustre
- Erysimum deflexum, Bent treacle mustard
- Erysimum kykkoticum
- Hornungia angustilimbata, Narrow-limbed hornungia
- Lepidium arbuscula
- Lepidium orbiculare
- Lepidium turczaninowii
- Rorippa valdes-bermejoi
- Sinapidendron angustifolium
- Sinapidendron rupestre
- Thlaspi zangezuricum, Zangezurian pennycress
Varieties
- Aethionema grandiflorum var. sintenisii, Persian stonecress
There are 51 species and two varieties in the order Apiales assessed as critically endangered.
Species
- Aralia rex
- Astropanax procumbens
- Dendropanax cordifolius
- Dendropanax filipes
- Dendropanax grandiflorus
- Dendropanax grandis
- Dendropanax hondurensis
- Dendropanax oligodontus
- Heptapleurum agamae
- Heptapleurum curranii
- Heptapleurum heptaphyllum
- Heptapleurum kuchingense
- Heptapleurum marlipoense
- Heptapleurum parvifoliolatum
- Merrilliopanax chinensis
- Meryta brachypoda
- Meryta salicifolia
- Oreopanax lehmannii
- Oreopanax lempiranus
- Osmoxylon mariannense
- Plerandra baillonii
- Plerandra sp. "letocartiorum"
- Plerandra sp. "mackeei"
- Plerandra sp. "memaoyaensis"
- Plerandra sp. "pouemboutensis"
- Polyscias aemiliguineae
- Polyscias bisattenuata
- Polyscias flynnii
- Polyscias gracilis
- Polyscias gymnocarpa, Koolau tetraplasandra
- Polyscias lionnetii
- Polyscias neraudiana
- Polyscias paniculata
- Polyscias racemosa
- Polyscias rodriguesiana
- Polyscias tahitensis
Varieties
- Polyscias sechellarum var. contracta
- Polyscias sechellarum var. curiosae
Umbelliferae
- Apium bermejoi
- Athamanta cortiana
- Bupleurum dianthifolium
- Bupleurum elatum
- Bupleurum kakiskalae
- Bupleurum latissimum
- Chaerophyllum karsianum, Karsian chervil
- Chaerophyllum posofianum, Posofian chervil
- Ferula mervynii, Mervyn's giant fennel
- Horstrissea dolinicola
- Laserpitium longiradium
- Ligusticum huteri
- Monizia edulis
- Naufraga balearica
- Niphogeton sprucei
- Sanicula mariversa
- Sanicula purpurea
There are 41 species, two subspecies, and one variety in the order Gentianales assessed as critically endangered.
- Amsonia orientalis, Blue star
- Hunteria hexaloba (possibly extinct)
- Kibatalia longifolia
- Lepinia taitensis
- Mandevilla jamesonii
- Neisosperma thiollierei, synonym of Ochrosia thiollierei
- Ochrosia inventorum
- Ochrosia kilaueaensis
- Pachypodium eburneum
- Pachypodium inopinatum
- Prestonia parvifolia
- Prestonia schumanniana (possibly extinct)
- Rauvolfia sachetiae
- Tabernaemontana apoda
Species
- Geniostoma clavigerum
- Labordia cyrtandrae
- Labordia helleri
- Labordia hosakana
- Labordia lorenceana
- Labordia triflora
- Strychnos tetragona
Varieties
- Labordia tinifolia var. wahiawaensis
Species
- Asclepias kamerunensis
- Cynanchum densiflorum
- Cynanchum serpyllifolium
- Cynanchum spruceanum
- Cynanchum velutinum
- Duvaliandra dioscoridis
- Goniostemma punctatum
- Matelea ecuadorensis (possibly extinct)
- Matelea orthoneura
- Matelea sprucei
- Metalepis gentryi
- Metalepis haughtii
- Metastelma anegadense
- Neoschumannia kamerunensis
- Pentastelma auritum
- Utleria salicifolia
Subspecies
- Ceropegia decidua subsp. pretoriensis
- Pentarrhinum abyssinicum subsp. ijimense
- Centaurium sebaeoides
- Exacum socotranum
- Gentiana kurroo
There are 48 species, two subspecies, and one variety in the order Rosales assessed as critically endangered.
- Couepia joaquinae
- Couepia scottmorii
- Dactyladenia dichotoma
- Dactyladenia eketensis
- Dactyladenia johnstonei
- Licania chiriquiensis
- Magnistipula multinervia
Species
- Bencomia brachystachya
- Bencomia sphaerocarpa
- Cercocarpus traskiae, Catalina mahogany
- Crataegus darvasica
- Crataegus knorringiana
- Crataegus necopinata
- Crataegus turcicus, Turkish hawthorn
- Pentactina rupicola
- Potentilla seidlitziana, Zeidlits' five-fingers
- Prunus ernestii
- Pyrus browiczii, Brovich's pear
- Pyrus gergerana, Gergeranian pear
- Pyrus korshinskyi
- Pyrus magyarica
- Pyrus tadshikistanica
- Pyrus voronovii, Voronov's pear
- Rosa dolichocarpa, Long-fruited brier
- Rubus takhtadjanii, Takhtadjan's blackberry
- Sibiraea tianschanica
- Sorbus decipiens
- Sorbus leptophylla, Thin-leaved whitebeam
- Sorbus leyana, Ley's whitebeam
- Sorbus maderensis
- Sorbus parumlobata
- Sorbus wilmottiana, Wilmott's whitebeam
Subspecies
- Alchemilla fischeri subsp. camerunensis
- Polylepis tomentella subsp. nana
Other Rosales
Species
- Aichryson dumosum
- Byblis gigantea
- Connarus ecuadorensis
- Connarus popenoei
- Monanthes wildpretii
- Pittosporum coriaceum
- Pittosporum raivavaeense
- Pittosporum tanianum
- Pittosporum viridulatum
- Ribes malvifolium
- Ribes sardoum, Sardinian currant
- Saxifraga artvinensis, Artvinian rockfoil
- Sedum euxinum, Euxinian stonecrop
- Weinmannia exigua
- Weinmannia tinctoria
Varieties
- Geissois ternata var. serrata
There are 28 species and one variety in Primulales assessed as critically endangered.
- Ardisia byrsonimae
- Ardisia etindensis
- Ardisia oligantha
- Ardisia schlechteri
- Badula crassa
- Badula platyphylla
- Badula reticulata
- Gentlea molinae
- Myrsine andersonii
- Myrsine brownii
- Myrsine hartii
- Myrsine juddii
- Myrsine longifolia
- Myrsine mezii
- Myrsine ronuiensis
- Parathesis eggersiana
- Rapanea ceylanica
- Rapanea seychellarum
Species
- Clavija parvula
Varieties
- Jacquinia macrantha var. clarendonensis
- Lysimachia daphnoides
- Lysimachia iniki
- Lysimachia lydgatei
- Lysimachia maxima
- Lysimachia ovoidea
- Lysimachia pendens
- Lysimachia scopulensis
- Lysimachia venosa
- Primula boveana, Sinai primrose
Rhamnales
Species
- Auerodendron pauciflorum
- Colubrina hondurensis
- Colubrina oppositifolia
- Gouania meyenii
- Gouania vitifolia, Oahu chewstick
- Phylica polifolia, St Helena rosemary
- Reynosia jamaicensis
Varieties
- Cayratia pedata var. glabra
Species
- Debregeasia ceylanica
- Dorstenia bicaudata (possibly extinct)
- Ficus angladei
- Ficus lateriflora
- Maillardia pendula, synonym of Maillardia montana
- Neraudia angulata
- Neraudia kauaiensis
- Neraudia ovata, Big Island ma'oloa
- Neraudia sericea
- Perebea glabrifolia
- Pilea cataractae
- Pilea laevicaulis
- Pilea pollicaris
- Pilea selbyanorum
- Pseudolmedia manabiensis
- Trilepisium gymnandrum
- Ulmus gaussenii
- Urera kaalae
- Zelkova sicula
Varieties
- Neraudia angulata var. angulata
- Neraudia angulata var. dentata
Species
- Bonamia menziesii
- Cestrum tipocochense
- Convolvulus argyrothamnos
- Convolvulus durandoi
- Mellissia begonifolia, Boxwood
- Nothocestrum breviflorum, Small-flowered nothocestrum
- Nothocestrum peltatum
- Nymphoides macrospermum
- Nymphoides sivarajanii
- Solanum dolichorhachis
- Solanum drymophilum
- Solanum incompletum
- Solanum lanuginosum
- Solanum lidii
- Solanum ovum-fringillae
- Solanum semicoalitum (possibly extinct)
- Turbina inopinata
Varieties
- Ipomoea prismatosyphon var. trifida
Scrophulariales
There are 75 species, two subspecies, and one variety in the order Scrophulariales assessed as critically endangered.
- Chionanthus fluminensis
- Chionanthus proctorii
- Chionanthus subsessilis
- Chionanthus tenuis
- Fraxinus americana (white ash or American ash)
- Fraxinus hondurensis
- Fraxinus pennsylvanica (green ash or red ash)
- Jasminum azoricum
- Linociera albidiflora
Species
- Columnea asteroloma
- Columnea manabiana
- Columnea poortmannii
- Cyrtandra crenata (possibly extinct)
- Cyrtandra dentata
- Cyrtandra kaulantha, Waikane Valley cyrtandra
- Cyrtandra lillianae, Te Manga cyrtandra
- Cyrtandra mareensis
- Cyrtandra paliku
- Cyrtandra polyantha, Niu Valley cyrtandra
- Cyrtandra rarotongensis, Rarotonga cyrtandra
- Cyrtandra subumbellata
- Cyrtandra viridiflora
- Diastema incisum
- Gasteranthus atratus
- Gasteranthus extinctus
- Monopyle paniculata
- Ornithoboea emarginata
- Paraboea albida
- Paraboea tarutaoensis
- Paraboea uniflora
- Primulina modesta
- Saintpaulia teitensis
- Saintpaulia ulugurensis
- Saintpaulia watkinsii
- Streptocarpus burttianus
- Streptocarpus euanthus
- Streptocarpus kimbozanus
- Streptocarpus thysanotus
Subspecies
- Saintpaulia ionantha subsp. grandifolia
- Saintpaulia ionantha subsp. rupicola
Varieties
- Gesneria scabra var. fawcettii
- Amphitecna spathicalyx
- Chodanthus montecillensis
- Parmentiera morii
- Stereospermum zenkeri (possibly extinct)
- Asystasia masaiensis
- Barleria observatrix
- Blepharis refracta
- Brachystephanus kupeensis
- Brachystephanus schliebenii
- Carlowrightia ecuadoriana
- Championella sarcorrhiza
- Crossandra acutiloba
- Crossandra cinnabarina
- Dicliptera dodsonii
- Dischistocalyx rivularis
- Hygrophila madurensis
- Isoglossa asystasioides
- Justicia callopsoidea
- Justicia drummondii
- Justicia mkungweensis
- Megalochlamys tanaensis
- Mellera insignis
- Psilanthele eggersii
- Sanchezia lampra
- Stenandrium carolinae, Caroline's pink
- Agalinis kingsii
- Antirrhinum charidemi
- Isoplexis chalcantha
- Odontites granatensis
- Paulownia kawakamii
- Scrophularia capillaris, Capillary figwort
- Verbascum decursivum, Decurrent mullein
- Verbascum transcaucasicum, Transcaucasian speedwell
- Veronica allahuekberensis, Allahuekberian speedwell
- Veronica oetaea
Other Scrophulariales species
There are 64 species and three varieties in the order Lamiales assessed as critically endangered.
- Aegiphila caymanensis
- Aegiphila glomerata
- Callicarpa ampla
- Citharexylum quitense
- Citharexylum svensonii
- Cornutia obovata
- Gmelina lignum-vitreum
- Holmskioldia gigas
- Stachytarpheta svensonii
- Tectona philippinensis, Philippine teak
- Vitex yaundensis
Labiatae
Species
- Cuminia eriantha
- Cuminia fernandezia
- Hyptis argutifolia
- Hyptis diversifolia
- Lamium tschorochense, Chorokhian dead nettle
- Micromeria glomerata
- Phyllostegia electra
- Phyllostegia haliakalae
- Phyllostegia helleri
- Phyllostegia hirsuta
- Phyllostegia hispida
- Phyllostegia kaalaensis
- Phyllostegia kahiliensis (possibly extinct)
- Phyllostegia knudsenii (possibly extinct)
- Phyllostegia mollis
- Phyllostegia parviflora
- Phyllostegia renovans
- Phyllostegia waimeae
- Phyllostegia warshaueri
- Phyllostegia wawrana
- Plectranthus dissitiflorus
- Plectranthus scopulicola (possibly extinct)
- Salvia caymanensis
- Salvia herbanica
- Salvia veneris, Kythrean sage
- Scutellaria rhomboidalis, Rhomboid skullcap
- Sideritis cystosiphon
- Sideritis discolor
- Sideritis marmorea
- Sideritis serrata
- Stachys bayburtensis, Bayburt woundwort
- Stachys choruhensis, Choruh woundwort
- Stachys sosnowskyi, Sosnowsky's woundwort
- Stenogyne bifida (possibly extinct in the wild)
- Stenogyne campanulata (possibly extinct in the wild)
- Stenogyne kanehoana (possibly extinct in the wild)
- Stenogyne kealiae
- Teucrium abutiloides
Varieties
- Phyllostegia parviflora var. glabriuscula
- Phyllostegia parviflora var. lydgatei
- Phyllostegia parviflora var. parviflora
- Amsinckia marginata (possibly extinct)
- Cordia leslieae
- Echium acanthocarpum
- Echium handiense
- Gyrocaryum oppositifolium
- Nonea karsensis, Karsian nonea
- Onosma arcuata, Curved goldendrop
- Onosma nigricaulis, Black-stemmed goldendrop
- Solenanthus reverchonii
- Symphytum savvalense, Savvalian comfrey
- Tournefortia obtusiflora (possibly extinct)
- Varronia bellonis
- Varronia rupicola
- Varronia urticacea
- Varronia wagnerorum, Wagners' cordia
Nepenthales
Species
- Drosera insolita
- Drosera katangensis
- Nepenthes aristolochioides
- Nepenthes attenboroughii, Attenborough's pitcher plant
- Nepenthes clipeata
- Nepenthes dubia
- Nepenthes lavicola
- Nepenthes macrophylla
- Nepenthes rigidifolia
- Nepenthes sumatrana
- Nepenthes suratensis
- Sarracenia oreophila, Green pitcherplant
Subspecies
- Sarracenia rubra subsp. alabamensis
Species
- Aconitum chasmanthum
- Anemone maxima
- Aquilegia barbaricina, Barbaricina colombine
- Aquilegia nuragica, Nuragica columbine
- Berberis karkaralensis
- Berberis nilghiriensis
- Callianthemum kernerianum
- Consolida samia
- Delphinium caseyi, Casey's larkspur
- Delphinium iris, Larkspur
- Delphinium munzianum, Larskpur
- Odontocarya perforata
- Ranunculus aragazi, Aragatsian buttercup
- Ranunculus tempskyanus, Buttercup
- Ranunculus vermirrhizus, Worm-rooted buttercup
- Triclisia macrophylla
Varieties
- Cissampelos nigrescens var. cardiophylla
- Calligonum calcareum
- Calligonum triste
- Coccoloba cholutecensis
- Coccoloba lindaviana
- Coccoloba retirensis
- Polygonum caspicum, Caspian knotweed
- Polygonum toktogulicum
- Rumex tunetanus
Podostemales
- Apinagia peruviana
- Devillea flagelliformis (possibly extinct)
- Dicraeanthus zehnderi
- Ledermanniella batangensis
- Ledermanniella keayi
- Ledermanniella sanagaensis
- Saxicolella marginalis
- Terniopsis ubonensis
- Winklerella dichotoma
- Zehnderia microgyna
Species
- Acacia anegadensis, Pokemeboy
- Acacia belairioides
- Acacia mathuataensis
- Acacia roigii
- Aeschynomene ruspoliana (possibly extinct)
- Albizia vaughanii
- Alistilus magnificus
- Ammopiptanthus nanus
- Amorpha crenulata, Clusterspike false indigo
- Anthonotha leptorrhachis
- Astragalus acmophylloides, Sharp-leaved milk vetch
- Astragalus bylowae, Bylov's milk vetch
- Astragalus cavanillesii
- Astragalus daghestanicus, Daghestanian milk vetch
- Astragalus eliasianus, Eliasian milk vetch
- Astragalus igniarius
- Astragalus longivexillatus, Long-flagged milk vetch
- Astragalus magnificus, Big astragalus
- Astragalus maritimus
- Astragalus nigrocalycinus, Black-calyx milk vetch
- Astragalus olurensis, Olurian milk vetch
- Astragalus schachbuzensis, Shakhbuzian milk vetch
- Astragalus schmolliae, Schmoll's milkvetch
- Astragalus sinuatus, Whited's milkvetch
- Astragalus tatlii, Tatli's milk vetch
- Astragalus trabzonicus, Trabzonian milk vetch
- Astragalus tremolsianus
- Astragalus verrucosus
- Bauhinia seminarioi
- Brachystegia oblonga
- Browneopsis macrofoliolata
- Cadia rubra
- Caesalpinia kavaiensis
- Callerya neocaledonica (possibly extinct)
- Canavalia favieri
- Canavalia molokaiensis, Molokai jack-bean
- Canavalia napaliensis
- Canavalia pubescens
- Canavalia veillonii (possibly extinct)
- Chamaecrista seticrenata
- Chamaecrista souzana
- Chloroleucon tortum
- Chordospartium muritai, Coastal tree broom
- Clitoria andrei (possibly extinct)
- Coursetia cajamarcana
- Crudia bibundina
- Cynometra falcata
- Cynometra filifera
- Cynometra gillmanii
- Cytisus aeolicus
- Dalbergia intibucana
- Dalea sabinalis, Sabinal prairie-clover (possibly extinct)
- Delonix tomentosa (possibly extinct)
- Dialium travancoricum
- Dimorphandra wilsonii
- Eligmocarpus cynometroides
- Eriosema adamaouense
- Erythrina perrieri
- Erythrina schliebenii
- Erythrina tahitensis
- Gleditsia vestita
- Gymnocladus assamicus
- Hymenostegia talbotii
- Indigofera ankaratrensis
- Indigofera suarezensis
- Inga enterolobioides
- Kanaloa kahoolawensis (possibly extinct in the wild)
- Kennedia retrorsa
- Lathyrus belinensis
- Lonchocarpus molinae
- Lonchocarpus phaseolifolius
- Lonchocarpus sanctuarii
- Lonchocarpus trifolius
- Lonchocarpus yoroensis
- Lotus armeniacus, Armenian bird's foot trefoil
- Lotus benoistii
- Lotus eremiticus
- Lotus kunkelii
- Lotus maculatus
- Lotus pyranthus
- Medicago citrina
- Microberlinia bisulcata
- Mimosa kitrokala (possibly extinct)
- Mimosa mensicola
- Mimosa morongii
- Monopetalanthus hedinii
- Neoharmsia baronii
- Newtonia camerunensis
- Ormocarpopsis itremoensis
- Orphanodendron bernalii
- Ostryocarpus zenkerianus
- Parkia parrii
- Parkinsonia peruviana
- Phaseolus lignosus, Bermuda bean
- Phaseolus rimbachii
- Phylloxylon arenicola
- Phylloxylon phillipsonii
- Phylloxylon xiphoclada
- Plagiosiphon longitubus
- Platymiscium albertinae
- Platysepalum scaberulum
- Rhynchosia ledermannii (possibly extinct)
- Serianthes nelsonii
- Serianthes rurutensis
- Sophora rubriflora
- Swartzia oraria
- Talbotiella gentii
- Teline nervosa
- Teline salsoloides
- Thermopsis turcica
- Trifolium bobrovii, Bobrov's clover
- Trifolium gillettianum
- Vicia bifoliolata
- Vicia costae
- Vicia erzurumica, Erzurumian vetch
- Vicia ferreirensis
- Vicia fulgens
- Vicia menziesii, Hawaiian vetch
- Vicia quadrijuga, Quadrijugous vetch
- Vouacapoua americana
- Zornia vaughaniana
Subspecies
- Astragalus macrocarpus subsp. lefkarensis, Lefkara milk-vetch
Varieties
- Humboldtia unijuga var. trijuga
There are 145 species, two subspecies, and one variety in the order Caryophyllales assessed as critically endangered.
Species
- Allochrusa takhtajanii, Takhtadjyan's allochrusa
- Alsinidendron lychnoides
- Alsinidendron obovatum
- Alsinidendron trinerve, Three nerved alsinidendron
- Alsinidendron viscosum, Climbing alsinidendron
- Arenaria bolosii
- Arenaria nevadensis
- Arenaria radians
- Bufonia takhtajanii, Takhtadjyan's bufonia
- Dianthus morisianus
- Drymaria monticola
- Minuartia dirphya
- Saponaria jagelii
- Schiedea adamantis
- Schiedea apokremnos
- Schiedea attenuata (possibly extinct in the wild)
- Schiedea haleakalensis
- Schiedea helleri
- Schiedea hookeri
- Schiedea kaalae
- Schiedea kauaiensis
- Schiedea kealiae
- Schiedea membranacea
- Schiedea nuttallii
- Schiedea perlmanii
- Schiedea stellarioides
- Schiedea viscosa
- Silene alexandri
- Silene chustupica, Khustup campion
- Silene cobalticola
- Silene gazulensis
- Silene ispirensis, Ispirian catchfly
- Silene nocteolens
- Silene perlmanii (possibly extinct in the wild)
Subspecies
- Moehringia intricata subsp. tejedensis
Species
- Acharagma aguirreanum
- Arrojadoa albiflora
- Arrojadoa marylaniae
- Astrophytum caput-medusae
- Cereus saddianus
- Cipocereus pusilliflorus
- Cleistocactus hoffmannii
- Cleistocactus xylorhizus
- Coleocephalocereus braunii
- Coleocephalocereus diersianus
- Coleocephalocereus purpureus
- Consolea corallicola, Florida semaphore cactus
- Consolea falcata
- Copiapoa ahremephiana
- Copiapoa angustiflora
- Copiapoa decorticans
- Copiapoa esmeraldana
- Corynopuntia reflexispina
- Coryphantha potosiana
- Cylindropuntia hystrix
- Discocactus cangaensis
- Discocactus hartmannii
- Discocactus petr-halfari
- Discocactus subterraneo-proliferans (possibly extinct in the wild)
- Echinocereus nivosus
- Echinopsis walteri
- Eriosyce chilensis
- Eriosyce laui
- Estevesia alex-bragae
- Gymnocalycium albiareolatum
- Gymnocalycium neuhuberi
- Gymnocalycium ragonesei
- Haageocereus pacalaensis
- Haageocereus tenuis
- Hylocereus escuintlensis
- Leptocereus carinatus
- Leptocereus grantianus
- Leptocereus leonii
- Leptocereus scopulophilus
- Leptocereus wrightii
- Mammillaria albiflora
- Mammillaria anniana
- Mammillaria carmenae
- Mammillaria duwei
- Mammillaria glochidiata
- Mammillaria herrerae, Golf ball
- Mammillaria humboldtii
- Mammillaria laui
- Mammillaria manana
- Mammillaria marcosii
- Mammillaria pennispinosa
- Mammillaria sanchez-mejoradae
- Mammillaria schwarzii
- Mammillaria theresae
- Mammillaria zeilmanniana
- Matucana aureiflora
- Matucana huagalensis
- Matucana madisoniorum
- Matucana ritteri
- Melocactus braunii
- Melocactus brederooianus
- Melocactus conoideus
- Melocactus ferreophilus
- Micranthocereus streckeri
- Mirabella estevesii (possibly extinct in the wild)
- Myrtillocactus eichlamii
- Opuntia abjecta
- Opuntia chaffeyi
- Parodia arnostiana
- Parodia buiningii
- Parodia crassigibba
- Parodia herteri
- Parodia neohorstii
- Parodia nivosa
- Parodia nothorauschii
- Parodia rechensis
- Parodia werdermanniana
- Pediocactus knowltonii, Knowlton's cactus
- Peniocereus maculatus
- Peniocereus occidentalis
- Peniocereus zopilotensis
- Pereskia quisqueyana
- Pilosocereus azulensis
- Pilosocereus diersianus
- Pilosocereus frewenii
- Pygmaeocereus bylesianus
- Rhipsalis mesembryanthemoides
- Rhipsalis pentaptera
- Rhipsalis triangularis
- Sclerocactus brevispinus, Pariette cactus
- Stenocereus chacalapensis
- Turbinicarpus alonsoi
- Turbinicarpus gielsdorfianus
- Turbinicarpus hoferi
- Turbinicarpus laui
- Turbinicarpus mandragora
- Turbinicarpus swobodae
- Uebelmannia buiningii
- Weberocereus frohningiorum
Subspecies
- Ariocarpus bravoanus subsp. bravoanus
Other Caryophyllales
Species
- Achyranthes mutica, Blunt chaff flower
- Amaranthus brownii
- Atriplex plebeja
- Beta patula
- Charpentiera densiflora, Dense-flowered charpentiera
- Cremnophyton lanfrancoi, Maltase cliff-orache
- Delosperma macellum
- Kewa acida, Salad plant
- Khadia beswickii
- Patellifolia webbiana
- Pisonia graciliscens
- Pisonia margaretiae
Varieties
- Achyranthes splendens var. rotundata
Species
- Alnus henryi (possibly extinct)
- Betula chichibuensis, Chichibu birch
- Betula gynoterminalis (possibly extinct)
- Betula halophila
- Betula klokovii
- Betula murrayana, Murray birch
- Carpinus putoensis, Puto hornbeam
- Carpinus tientaiensis
- Castanea dentata, American Chestnut
- Castanopsis catappaefolia
- Cyclobalanopsis repandifolia
- Nothofagus nuda
- Ostrya chisosensis, Chisos hop-hornbeam
- Ostrya rehderiana
- Pasania formosana
- Quercus boyntonii, Boynton oak
- Quercus graciliformis, Slender oak
- Quercus hinckleyi, Hinckley's oak
- Quercus hintonii
- Quercus mulleri
- Quercus tardifolia, Chisos Mountains oak
Subspecies
- Betula lenta subsp. uber, Virginia round-leaf birch
- Betula procurva subsp. schugnanica
Other dicotyledons
Species
- Bruguiera hainesii
- Callitriche pulchra
- Cassipourea eketensis
- Cassipourea subcordata
- Cassipourea subsessilis
- Clethra coloradensis
- Dillenia triquetra
- Haloragis stokesii
- Hibbertia bouletii
- Hibbertia favieri
- Linum cratericola, Floreana flax
- Melanophylla angustior
- Melanophylla perrieri
- Molinadendron hondurense
- Myrica rivas-martinezii
- Nyssa yunnanensis
- Plantago almogravensis
- Plantago famarae
- Plantago robusta, St Helena plantain
- Populus berkarensis
- Rafflesia magnifica
- Rhododendron wilhelminae
- Rhodothamnus sessilifolius, Sessile-leaved rhodothamnus
- Salix tarraconensis
- Schumacheria alnifolia
- Swida darvasica
Varieties
- Rhododendron protistum var. giganteum
There are 421 species, six subspecies, and five varieties of monocotyledon assessed as critically endangered.
Species
- Acanthophoenix rubra
- Asterogyne yaracuyense
- Astrocaryum minus
- Attalea crassispatha
- Bactris nancibaensis
- Balaka macrocarpa
- Calamus compsostachys
- Calamus obovoideus
- Calamus sabalensis
- Calamus wailong
- Carpoxylon macrospermum
- Ceroxylon sasaimae
- Chamaedorea plumosa
- Coccothrinax borhidiana
- Cryosophila cookii
- Cryosophila grayumii
- Cyphophoenix nucele
- Cyphosperma tanga
- Drymophloeus samoensis
- Dypsis albofarinosa
- Dypsis ambanjae
- Dypsis ambositrae
- Dypsis ampasindavae
- Dypsis andilamenensis
- Dypsis anjae
- Dypsis antanambensis
- Dypsis aquatilis
- Dypsis arenarum
- Dypsis basilonga
- Dypsis beentjei
- Dypsis brevicaulis
- Dypsis brittiana (possibly extinct)
- Dypsis canaliculata
- Dypsis carlsmithii
- Dypsis caudata
- Dypsis cookei
- Dypsis digitata
- Dypsis dracaenoides
- Dypsis elegans
- Dypsis gronophyllum
- Dypsis hovomantsina
- Dypsis humilis
- Dypsis ifanadianae
- Dypsis intermedia
- Dypsis interrupta
- Dypsis jeremiei
- Dypsis laevis
- Dypsis lanuginosa
- Dypsis leptocheilos
- Dypsis mahia
- Dypsis mangorensis
- Dypsis metallica
- Dypsis nauseosa
- Dypsis nossibensis
- Dypsis oropedionis
- Dypsis ovobontsira
- Dypsis pervillei
- Dypsis pulchella
- Dypsis pumila
- Dypsis rakotonasoloi
- Dypsis ramentacea
- Dypsis reflexa
- Dypsis remotiflora
- Dypsis robusta
- Dypsis sahanofensis
- Dypsis sancta
- Dypsis sanctaemariae
- Dypsis scandens
- Dypsis singularis
- Dypsis tanalensis
- Dypsis tokoravina
- Dypsis trapezoidea
- Dypsis vonitrandambo
- Hemithrinax ekmaniana
- Hyophorbe amaricaulis
- Hyophorbe lagenicaulis, Bottle palm
- Hyophorbe vaughanii
- Hyophorbe verschaffeltii
- Lavoixia macrocarpa
- Loxococcus rupicola
- Masoala madagascariensis
- Medemia argun
- Pelagodoxa henryana
- Pinanga tashiroi
- Pritchardia affinis
- Pritchardia aylmer-robinsonii
- Pritchardia hardyi
- Pritchardia kaalae
- Pritchardia limahuliensis
- Pritchardia munroi
- Pritchardia napaliensis
- Pritchardia schattaueri
- Pritchardia viscosa
- Pritchardiopsis jeanneneyi
- Pseudophoenix ekmanii
- Pseudophoenix lediniana
- Ravenea beentjei
- Ravenea delicatula
- Ravenea hypoleuca
- Ravenea lakatra
- Ravenea latisecta
- Ravenea louvelii
- Ravenea moorei
- Ravenea musicalis
- Tahina spectabilis, Tahina palm
- Tectiphiala ferox
- Voanioala gerardii
Varieties
- Dictyosperma album var. album
- Dictyosperma album var. conjugatum, Hurricane palm
- Roystonea regia var. hondurensis
There are 167 species and one subspecies in Orchidales assessed as critically endangered.
Species
- Aeranthes albidiflora (possibly extinct)
- Aeranthes leandriana
- Aeranthes multinodis
- Amesiella monticola
- Anathallis kleinii
- Angraecum mahavavense (possibly extinct)
- Angraecum muscicolum (possibly extinct)
- Angraecum palmicolum
- Angraecum perhumile (possibly extinct)
- Angraecum peyrotii
- Angraecum pinifolium
- Angraecum potamophilum (possibly extinct)
- Angraecum rigidifolium (possibly extinct)
- Angraecum rubellum (possibly extinct)
- Angraecum serpens (possibly extinct)
- Angraecum sterrophyllum (possibly extinct)
- Anguloa cliftonii, Clifton's anguloa
- Ascoglossum calopterum
- Benthamia dauphinensis
- Benthamia nigro-vaginata (possibly extinct)
- Brachionidium pteroglossum
- Bulbophyllum ceriodorum
- Bulbophyllum erythroglossum (possibly extinct)
- Bulbophyllum filiforme
- Bulbophyllum hirsutiusculum (possibly extinct)
- Bulbophyllum kupense
- Bulbophyllum minax (possibly extinct)
- Bulbophyllum moratii
- Bulbophyllum sanguineum (possibly extinct)
- Bulbophyllum tampoketsense (possibly extinct)
- Bulbophyllum zaratananae (possibly extinct)
- Ceratocentron fesselii
- Corybas dienemus, Windswept helmet orchid
- Cryptopus dissectus
- Cyclopogon werffii
- Cynorkis ambondrombensis
- Cynorkis bimaculata (possibly extinct)
- Cynorkis catatii (possibly extinct)
- Cynorkis formosa
- Cynorkis globifera
- Cynorkis henrici
- Cynorkis humbertii
- Cynorkis monadenia
- Cynorkis muscicola
- Cynorkis pinguicularioides
- Cynorkis pseudorolfei
- Cynorkis rolfei (possibly extinct)
- Cynorkis sacculata
- Cynorkis sagittata
- Cynorkis schlechterii
- Cynorkis souegesii
- Cynorkis sylvatica (possibly extinct)
- Cynorkis tristis
- Cynorkis usambarae (possibly extinct)
- Cypripedium daweishanense
- Cypripedium froschii
- Cypripedium malipoense, Malipo cypripedium
- Cypripedium segawae, Segawa's cypripedium
- Cypripedium taibaiense, Mt Taibai cypripedium
- Cypripedium wumengense
- Dendrobium huoshanense
- Dendrobium officinale
- Dendrobium schuetzei
- Dendrophylax fawcettii
- Diaphananthe orientalis (possibly extinct)
- Diplandrorchis sinica
- Disperis bosseri (possibly extinct)
- Disperis ciliata
- Disperis egregia (possibly extinct)
- Diuris byronensis, Byron Bay donkey orchid
- Encyclia kingsii
- Epidendrum montserratense, Montserrat orchid
- Eulophia grandidieri (possibly extinct)
- Eulophia mangenotiana
- Gastrochilus calceolaris
- Gastrodia africana
- Gastrodia zeylanica
- Genyorchis platybulbon
- Goodyera flaccida
- Goodyera macrophylla
- Goodyera perrieri
- Grammangis spectabilis
- Grandiphyllum schunkeanum
- Graphorkis medemiae
- Habenaria maitlandii
- Hexalectris revoluta, Chisos mountain crested coralroot
- Holopogon gaudissartii
- Liparis goodyeroides
- Malaxis bayardii, Bayard's adder's-mouth orchid
- Masdevallia apparitio, Apparition masdevallia
- Mexipedium xerophyticum, Dry-growing mexipedium
- Mystacidium nguruense
- Ossiculum aurantiacum
- Paphiopedilum adductum
- Paphiopedilum bougainvilleanum, Bougainville paphiopedilum
- Paphiopedilum canhii
- Paphiopedilum cornuatum
- Paphiopedilum dayanum, Day's paphiopedilum
- Paphiopedilum delenatii, Delanat's paphiopedilum
- Paphiopedilum druryi, Drury's paphiopedilum
- Paphiopedilum emersonii, Emerson's paphiopedilum
- Paphiopedilum exul, Excluded paphiopedilum
- Paphiopedilum fairrieanum, Fairrie's paphiopedilum
- Paphiopedilum fowliei, Fowlie's paphiopedilum
- Paphiopedilum gigantifolium, Giant-leaf paphiopedilum
- Paphiopedilum gratrixianum, Gratix's paphiopedilum
- Paphiopedilum guangdongense
- Paphiopedilum hangianum, Hang's paphiopedilum
- Paphiopedilum helenae, Ellen's paphiopedilum
- Paphiopedilum henryanum, Henry's paphiopedilum
- Paphiopedilum inamorii, Inamori's paphiopedilum
- Paphiopedilum intaniae, Intani paphiopedilum
- Paphiopedilum kolopakingii, Kolopaking's paphiopedilum
- Paphiopedilum lawrenceanum, Lawrence's paphiopedilum
- Paphiopedilum liemianum, Liem's paphiopedilum
- Paphiopedilum micranthum, Tiny flowered paphiopedilum
- Paphiopedilum ooii, Ooi's paphiopedilum
- Paphiopedilum parnatanum, Parnata's paphiopedilum
- Paphiopedilum platyphyllum, Broad-leaf paphiopedilum
- Paphiopedilum primulinum, Primrose yellow paphiopedilum
- Paphiopedilum purpuratum, Purple paphiopedilum
- Paphiopedilum qingyongii
- Paphiopedilum rothschildianum, Rothschild's paphiopedilum
- Paphiopedilum sanderianum, Sander's paphiopedilum
- Paphiopedilum sangii, Sang's paphiopedilum
- Paphiopedilum schoseri, Schoser's paphiopedilum
- Paphiopedilum stonei, Stone's paphiopedilum
- Paphiopedilum sugiyamanum, Sugiyama's paphiopedilum
- Paphiopedilum sukhakulii, Sukhakul's paphiopedilum
- Paphiopedilum supardii, Supard's paphiopedilum
- Paphiopedilum thaianum, Thai paphiopediulum
- Paphiopedilum tranlienianum, Tran's paphiopedilum
- Paphiopedilum urbanianum, Urban's paphiopedilum
- Paphiopedilum victoria-mariae, Virgin Mary paphiopedilum
- Paphiopedilum victoria-regina, Queen Victoria paphiopedilum
- Paphiopedilum vietnamense, Vietnamese paphiopedilum
- Paphiopedilum wenshanense, Wenshan paphiopedilum
- Paphiopedilum wentworthianum, Wentworth's paphiopedilum
- Peristylus holochila
- Phalaenopsis hainanensis
- Phalaenopsis micholitzii
- Phragmipedium andreettae
- Phragmipedium anguloi
- Phragmipedium christiansenianum, Christiansen's phragmipedium
- Phragmipedium dalessandroi, Dalessandro's phragmipedium
- Phragmipedium exstaminodium, Without a staminoda phragmipedium
- Phragmipedium fischeri, Fischer's phragmipedium
- Phragmipedium kovachii, Kovach's phragmipedium
- Phragmipedium manzurii, Manzur's phragmipedium
- Phragmipedium richteri, Richter's phragmipedium
- Phragmipedium tetzlaffianum, Tetzlaff's phragmipedium
- Polystachya acuminata (possibly extinct)
- Polystachya canaliculata (possibly extinct)
- Polystachya kupensis
- Polystachya porphyrochila (possibly extinct)
- Polystachya rugosilabia (possibly extinct)
- Polystachya victoriae
- Prasophyllum favonium, Western leek orchid
- Selenipedium chironianum
- Selenipedium vanillocarpum
- Serapias stenopetala
- Tridactyle sarcodantha (possibly extinct)
- Zeuxine rolfeana
Subspecies
- Cynorkis buchwaldiana subsp. buchwaldiana
- Aechmea cymosopaniculata (possibly extinct)
- Cryptanthus diamantinensis
- Guzmania bismarckii
- Guzmania lepidota (possibly extinct)
- Guzmania poortmanii (possibly extinct)
- Guzmania striata (possibly extinct)
- Hohenbergia caymanensis, Old George
- Pitcairnia elliptica
- Pitcairnia oranensis
- Puya compacta
- Puya exigua
- Tillandsia dyeriana
- Tillandsia yerba-santae
Species
- Allium baytopiorum, Baytop's onion
- Allium corsicum
- Allium czelghauricum, Czelghaurian onion
- Aloe boscawenii
- Aloe brunneostriata
- Aloe classenii
- Aloe dorotheae
- Aloe flexilifolia
- Aloe ghibensis
- Aloe helenae
- Aloe jucunda
- Aloe leptosiphon
- Aloe molederana
- Aloe pembana
- Aloe suzannae
- Aloidendron pillansii (as Aloe pillansii), Bastard quiver tree
- Astelia waialealae
- Bomarea angustifolia
- Bomarea goniocaulon
- Bomarea graminifolia
- Bomarea hartwegii
- Bomarea longipes
- Borderea chouardii
- Brimeura duvigneaudii
- Chlorophytum borivilianum
- Chlorophytum petrophilum
- Chlorophytum rhizopendulum
- Colchicum greuteri, Greuter's colchicum
- Colchicum leptanthum, Thin-flowered colchicum
- Crinum malabaricum
- Dioscorea strydomiana
- Fritillaria grandiflora, Big-flowered fritillary
- Gagea antakiensis, Antakya gagea
- Galanthus trojanus
- Iris antilibanotica
- Iris atropurpurea, Coastal iris
- Iris boissieri
- Iris cedreti
- Iris damascena
- Iris nusairiensis
- Lilium polyphyllum
- Mastigostyla orurensis
- Ornithogalum gabrielianiae, Gabrielyan's starflowers
- Romulea antiatlantica
- Scilla morrisii, Morris squill
- Tulipa gumusanica, Gumushanian tulip
Subspecies
- Narcissus nevadensis subsp. enemeritoi
Species
- Alocasia atropurpurea
- Alocasia sanderiana, Sander's alocasia
- Alocasia sinuata, Alocasia quilted dreams
- Amorphophallus interruptus
- Amorphophallus lanuginosus
- Amorphophallus synandrifer
- Anthurium coerulescens
- Anthurium eggersii
- Anthurium linguifolium
- Anthurium tenuicaule
- Arisaema kawashimae
- Arisaema rostratum
- Hapaline locii
- Philodendron balaoanum (possibly extinct)
- Philodendron cruentospathum
- Philodendron nanegalense
- Philodendron pogonocaule
- Syngonium dodsonianum
- Typhonium lineare
- Typhonium penicillatum
Subspecies
- Arisaema heterocephalum subsp. okinawaense
- Alpinia diversifolia
- Calathea dodsonii
- Calathea petersenii
- Costus barbatus
- Costus geothyrsus
- Costus vinosus (possibly extinct in the wild)
- Curcuma vitellina
- Newmania serpens
- Smithatris supraneanae
- Eriocaulon bolei
- Eriocaulon petraeum
- Eriocaulon ratnagiricum
- Eriocaulon rouxianum
- Eriocaulon santapaui
- Eriocaulon sharmae
- Eriocaulon sivarajanii
- Eriocaulon sulanum
- Commelina mwatayamvoana
- Xyris andina
- Xyris diaphanobracteata
- Xyris exigua
- Xyris ramboi
There are 37 species, two subspecies, and two varieties in Cyperales assessed as critically endangered.
Gramineae
Species
- Andropogon benthamianus (possibly extinct)
- Cenchrus agrimonioides
- Eragrostis episcopulus, Cliff hair grass
- Eragrostis muerensis
- Festuca aloha
- Garnotia cheesemanii, Rarotongan garnotia grass
- Garnotia sechellensis
- Humbertochloa greenwayi
- Isachne meeboldii
- Isachne veldkampii
- Ischaemum jayachandranii
- Panicum niihauense
- Panicum pearsonii (possibly extinct)
- Panicum socotranum
- Poa mannii
- Poa siphonoglossa
- Puccinellia raroflorens
- Sporobolus caespitosus
- Stipa tulcanensis
Subspecies
- Puccinellia distans subsp. embergeri
- Puccinellia distans subsp. font-queri
Varieties
- Cenchrus agrimonioides var. agrimonioides
Species
- Bulbostylis fusiformis
- Bulbostylis neglecta, Neglected tuft sedge
- Carex austromexicana
- Carex collifera
- Carex lapazensis
- Carex lepida
- Carex ownbeyi
- Carex tessellata
- Cyperus chionocephalus (possibly extinct)
- Cyperus flavoculmis
- Cyperus grandifolius
- Cyperus microcristatus
- Cyperus microumbellatus
- Cyperus multifolius (possibly extinct)
- Eleocharis lepta (possibly extinct)
- Fimbristylis hirsutifolia
- Hypolytrum subcompositus
- Scleria guineensis
Varieties
- Cyperus pennatiformis var. bryanii
Other monocotyledons
Species
- Asplundia clementinae
- Asplundia lutea
- Juncus maroccanus
- Kupea martinetugei
Subspecies
- Najas marina subsp. arsenariensis
See also
- Lists of IUCN Red List critically endangered species
- List of least concern plants
- List of near threatened plants
- List of vulnerable plants
- List of endangered plants
- List of recently extinct plants
- List of data deficient plants
References
- ↑ "IUCN Red List version 2023-1". International Union for Conservation of Nature and Natural Resources (IUCN). http://www.iucnredlist.org/.
- ↑ "Table 9: Possibly Extinct and Possibly Extinct in the Wild Species (IUCN Red List version 2023-1)". Union for Conservation of Nature and Natural Resources (IUCN). https://www.iucnredlist.org/statistics.
- ↑ "Limitations of the Data". Union for Conservation of Nature and Natural Resources (IUCN). http://www.iucnredlist.org/initiatives/mammals/description/limitations.
- ↑ "2001 Categories & Criteria (version 3.1)". Union for Conservation of Nature and Natural Resources (IUCN). http://www.iucnredlist.org/static/categories_criteria_3_1.
- ↑ Farjon, A. (2013). "Pinus torreyana subsp. torreyana". IUCN Red List of Threatened Species 2013: e.T34015A2840365. doi:10.2305/IUCN.UK.2013-1.RLTS.T34015A2840365.en. https://www.iucnredlist.org/species/34015/2840365. Retrieved 27 September 2020.
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