Ulmus × diversifolia

Elm cultivar

Ulmus × diversifolia

Ulmus × diversifolia, drawing by Melville, 1939 of a tree (ref 36.16), near Bramfield, Hertfordshire.[1]

Hybrid parentage| U. glabra × U. minor 'Plotii' × U. minor 'Coritana'
Origin| England

Ulmus × diversifolia, also known as the diverse leaved elm, was originally described by Melville in 1939 as a new species, U. diversifolia, though he later believed it a natural hybrid of Coritanian elm, Plot elm and Wych elm.[2] He recorded its distribution in Hertfordshire, between Hatfield, Hertford and Watton-at-Stone, and in Suffolk, where it was common along the coastal plain from Ipswich and Felixstowe to Lowestoft and Beccles, occurring inland as far as Diss and Debenham, and probably extending further north into Norfolk and south towards Colchester, Essex.[1] He accordingly referred to it as "the East Anglian elm".[3]

The inclusion of the disputed U. coritana in its parentage has affected the reception of U. × diversifolia. Richens, who rejected the former, ignored × diversifolia in his study of East Anglian elms.[4]

## Description

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Ulmus × diversifolia was described as an upright tree less than 20 m high with spreading branches and rather slender wiry branchlets.[1] Gerald Wilkinson described its supposed distinguishing feature — about ten per cent of leaves on short symmetrical shoots — as "rather subtle".[5] Melville included a drawing of the leaves in his 1946 paper, 'The British Elms', in The New Naturalist, and placed specimens in the Kew Herbarium.[6]

## Pests and diseases

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East Anglian hybrid elms, including those Melville's considered U. × diversifolia, are susceptible to Dutch elm disease, but as they produce abundant root-suckers immature specimens probably survive in their areas of origin.

## Cultivation

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A rooted sucker was taken from a tree from the Hatfield to Hertford road and transferred to the arboretum nursery at Kew.[1] Specimens held by the Royal Botanic Gardens at Wakehurst Place were listed as U. coritana × U. plotii × U. glabra and U. glabra × U. coritana × U. plotii.

## Notable trees

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Melville's type tree (ref 36.265) was situated on the south side of the Hatfield to Hertford road about three miles east of Hatfield.[1]

## Accessions

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### Europe

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* Royal Botanic Gardens, Kew, UK. Acc. no. not known.

## References

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1. ^ a b c d e Melville, Ronald (1939). "Contributions to the study of British elms. 2. The East Anglian Elm" (PDF). The Journal of Botany. 77: 138–145.
2. ^ "U. × diversifolia Melville". Bean's Trees and Shrubs. International Dendrology Society.
3. ^ Melville, Ronald, 'The British Elms', The New Naturalist, 1946, p.40
4. ^ Richens, R. H., Elm (Cambridge 1983)
5. ^ Wilkinson, Gerald, Epitaph for the Elm, 1978,  p.80
6. ^ "Herbarium specimen - K000852649". The Herbarium Catalogue. Royal Botanic Gardens, Kew.; "Herbarium specimen - K000852650". The Herbarium Catalogue. Royal Botanic Gardens, Kew.; "Herbarium specimen - K000852652". The Herbarium Catalogue. Royal Botanic Gardens, Kew.; "Herbarium specimen - K000852653". The Herbarium Catalogue. Royal Botanic Gardens, Kew.; "Herbarium specimen - K000852654". The Herbarium Catalogue. Royal Botanic Gardens, Kew.; "Herbarium specimen - K000852655". The Herbarium Catalogue. Royal Botanic Gardens, Kew.; "Herbarium specimen - K000852656". The Herbarium Catalogue. Royal Botanic Gardens, Kew.; "Herbarium specimen - K000852657". The Herbarium Catalogue. Royal Botanic Gardens, Kew. Sheets described as Ulmus diversifolia Melville

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Elm species, varieties, hybrids, hybrid cultivars and species cultivars

Species, varieties and subspecies|

* U. alata (Winged elm)
* U. americana (American elm)
* U. americana var. floridana (Florida elm)
* U. bergmanniana (Bergmann's elm)
* U. bergmanniana var. bergmanniana
* U. bergmanniana var. lasiophylla
* U. castaneifolia (Chestnut-leafed or multinerved elm)
* U. changii (Hangzhou elm)
* U. changii var. changii
* U. changii var. kunmingensis (Kunming elm)
* U. chenmoui (Chenmou or Langya Mountain elm)
* U. chumlia
* U. crassifolia (Cedar or Texas cedar elm)
* U. davidiana (David or Father David elm)
* U. davidiana var. davidiana
* U. davidiana var. japonica (Japanese elm)
* U. elongata (Long raceme elm)
* U. gaussenii (Anhui or hairy elm)
* U. glabra (Wych or scots elm)
* U. glaucescens (Gansu elm)
* U. glaucescens var. glaucescens
* U. glaucescens var. lasiocarpa (hairy-fruited glaucescent elm)
* U. harbinensis (Harbin elm)
* U. ismaelis
* U. laciniata (Manchurian cut-leaf or lobed elm)
* U. laciniata var. nikkoensis (Nikko elm)
* U. laevis (European white elm)
* U. laevis var. celtidea
* U. laevis var. parvifolia
* U. laevis var. simplicidens
* U. lamellosa (Hebei elm)
* U. lanceifolia (Vietnam elm)
* U. macrocarpa (Large-fruited elm)
* U. macrocarpa var. glabra
* U. macrocarpa var. macrocarpa
* U. mexicana (Mexican elm)
* U. microcarpa (Tibetan elm)
* U. minor (Field elm)
* U. minor subsp. minor
* U. minor var. italica
* U. parvifolia (Chinese or lacebark elm)
* U. parvifolia var. coreana (Korean elm)
* U. prunifolia (Cherry-leafed elm)
* U. pseudopropinqua (Harbin spring elm)
* U. pumila (Siberian elm)
* U. rubra (Slippery elm)
* U. serotina (September elm)
* U. szechuanica (Szechuan (Sichuan) or red-fruited elm)
* U. thomasii (Rock or cork elm)
* U. uyematsui (Alishan elm)
* U. villosa (Cherry-bark or marn elm)
* U. wallichiana (Himalayan or kashmir elm)
* U. wallichiana subsp. wallichiana
* U. wallichiana subsp. xanthoderma
* U. wallichiana var. tomentosa

Disputed species, varieties and subspecies|

* U. boissieri
* U. minor subsp. canescens (Grey, grey-leafed or hoary elm)
* U. elliptica

Hybrids|

* U. davidiana var. japonica × U. minor
* U. × arbuscula
* U. × arkansana
* U. × brandisiana
* U. × diversifolia
* U. × hollandica (Dutch elm)
* U. × hollandica var. insularum
* U. × intermedia
* U. × mesocarpa

Species cultivars|

| American elm|

* American Liberty
* Ascendens
* Augustine
* Aurea
* Beaverlodge
* Beebe's Weeping
* Brandon
* Burgoyne
* JFS Prince II
* College
* Columnaris
* Creole Queen
* Deadfree
* Delaware
* Exhibition
* Fiorei
* Flick's Spreader
* Folia Aurea Variegata
* Great Plains
* Hines
* Incisa
* Independence
* Iowa State
* Jackson
* Jefferson
* Kimley
* Klehmii
* L'Assomption
* Lake City
* Lewis & Clark
* Littleford
* Maine
* Markham
* Miller Park
* Minneapolis Park
* Moline
* Morden
* New Harmony
* Nigricans
* Patmore
* Pendula
* Penn Treaty
* Princeton
* Pyramidata
* Queen City
* Sheyenne
* Skinner Upright
* St. Croix
* Star
* Valley Forge
* Variegata
* Vase
* Washington

|

Cedar elm|

* Brazos Rim

Chinese elm|

* A-1
* A. Ross Central Park
* Blizzard
* BSNUPF
* Burgundy
* Burnley Select
* Catlin
* Chessins
* Churchyard
* Cork Bark
* D. B. Cole
* Drake
* Dynasty
* Ed Wood
* Elsmo
* Emer I
* Emer II
* Emerald Prairie
* Frosty
* Garden City Clone
* Geisha
* Glory
* Golden Rey
* Hallelujah
* Hokkaido
* Jade Empress
* King's Choice
* Littleleaf
* Lois Hole
* Matthew
* Milliken
* Nire-keyaki
* Ohio
* Orange Ribbon
* Pathfinder
* Pendens
* Prairie Shade
* Prince Richard
* Red Fall
* Sabamiki
* Sagei
* Seiju
* Select 380
* Sempervirens
* Small Frye
* State Fair
* Stone's Dwarf
* Taiwan
* The Thinker
* Todd
* True Green
* UPMTF
* Ware's
* Yarralumla
* Yatsubusa
* Zettler
* Ulmus parvifolia f. lanceolata

European white elm|

* Aureovariegata
* Colorans
* Helena
* Ornata
* Pendula
* Punctata
* Urticifolia

Field elm|

* Albo-Dentata
* Amplifolia
* Argenteo-Variegata
* Atinia
* Atinia Pyramidalis
* Atinia Variegata
* Bea Schwarz
* Betulaefolia
* Biltii
* Christine Buisman
* Concavaefolia
* Coritana
* Cretensis
* Cucullata
* Cucullata Variegata
* Dehesa de Amaniel
* Dehesa de la Villa
* Dicksonii
* Dijkwel
* Erecta
* Folia Alba-Punctata
* Glandulosa
* Goodyeri
* Hoersholmiensis
* Holmstruph
* Hunnybunii
* Hunnybunii pseudo-Stricta
* Laciniata
* Lanuginosa
* Majadahonda
* Microphylla Pendula
* Microphylla Purpurea
* Microphylla Rubra
* Monumentalis
* Pendula
* Picturata
* Plotii
* Propendens
* Punctata
* Purpurascens
* Purpurea
* Retiro
* Reverti
* Rugosa
* Rueppellii
* Sarniensis
* Schuurhoek
* Silvery Gem
* Sowerbyi
* Stricta
* Suberosa
* Umbraculifera Gracilis
* Umbraculifera
* Viminalis
* Viminalis Aurea
* Viminalis Gracilis
* Viminalis Incisa
* Viminalis Marginata
* Viminalis Pendula
* Viminalis Pulverulenta
* Viminalis Stricta
* Virgata
* Webbiana

Japanese elm|

* Discovery
* Freedom
* Jacan
* JFS-Bieberich
* Mitsui Centennial
* Prospector
* Reperta
* Reseda
* Thomson
* Validation

Siberian elm|

* Ansaloni
* Aurea
* Aurescens
* Chinkota
* Dropmore
* Dwarf Weeper
* Green King
* Hansen
* Harbin
* Manchu
* Mauro
* Mr. Buzz
* Park Royal
* Pendula
* Pinnato-ramosa
* Poort Bulten
* Puszta
* Pyramidalis Fiorei
* Zhonghua Jinye

Winged elm|

* Lace Parasol

Wych elm|

* Albo-Variegata
* Australis
* Camperdownii
* Cebennensis
* Concavaefolia
* Cornuta
* Corylifolia Purpurea
* Corylifolia
* Fastigiata Macrophylla
* Fastigiata Stricta
* Fastigiata Variegata
* Firma
* Flava
* Gigantea
* Gittisham
* Grandidentata
* Holgeri
* Horizontalis
* Insularis
* Latifolia
* Latifolia Aurea
* Latifolia Aureo-Variegata
* Latifolia Nigricans
* Luteo Variegata
* Lutescens
* Macrophylla
* Maculata
* Minor
* Nana
* Nigra
* Nitida
* Oblongata
* Pendula Macrophylla
* Pendula Variegata
* Pyrenaica
* Spectabilis
* Superba
* Tomentosa

Hybrid cultivars|

* Androssowii
* Amsterdam
* Arno
* Cathedral
* Clusius
* Columella
* Den Haag
* Dodoens
* Escaillard
* Fiorente
* Frontier
* Fuente Umbria
* Homestead
* Karagatch
* Lobel
* Morfeo
* Morton
* Morton Glossy
* Morton Plainsman
* Morton Red Tip
* Morton Stalwart
* Nanguen
* New Horizon
* Patriot
* Plantyn
* Plinio
* Rebella
* Rebona
* Recerta
* Regal
* Repura
* Revera
* San Zanobi
* Sapporo Autumn Gold
* Sapporo Gold 2
* Stavast
* Toledo
* Urban
* Wanoux
* Wingham

Dutch elm|

* Alba
* Angustifolia
* Balder
* Belgica
* Blandford
* Canadian Giant
* Cicestria
* Cinerea
* Commelin
* Dampieri
* Dauvessei
* Daveyi
* Dovaei
* Dumont
* Elegantissima
* Eleganto-Variegata
* Etrusca
* Fastigiata
* Fjerrestad
* Folia Rhomboidea
* Freja
* Fulva
* Gaujardii
* Groeneveld
* Haarlemensis
* Klemmer
* Loke
* Macrophylla Aurea
* Major
* Microphylla
* Modiolina
* Muscaviensis
* Odin
* Pioneer
* Pitteurs
* Serpentina
* Smithii
* Superba
* Tricolor
* Tyr
* Vegeta
* Viminalis
* Viscosa
* Wentworthii Pendula
* Wredei
* Ypreau

U. × intermedia|

* Coolshade
* Fremont
* Improved Coolshade
* Lincoln
* Rosehill
* Willis

Unconfirmed derivation cultivars|

* aff. Plotii
* Acutifolia
* Ademuz
* Alata
* Alksuth
* Argenteo-Marginata
* Aspera
* Atropurpurea
* Australis
* Berardii
* Betulaefolia Nigrescens
* Crispa
* Crispa Aurea
* Crispa Pendula
* Densa
* Exoniensis
* Fastigiata Glabra
* Folia Aurea
* Folia Rubra
* Folia Variegata Pendula
* Gallica
* Glabra
* Globosa
* Hamburg
* Hertfordensis Angustifolia
* Hertfordensis Latifolia
* Hillieri
* Jalaica
* Jacqueline Hillier
* Kansas Hybrid
* Klemmer Blanc
* Koopmannii
* Lombartsii
* Louis van Houtte
* Marmorata
* Monstrosa
* Myrtifolia
* Myrtifolia Purpurea
* Nemoralis
* Nigrescens
* Planeroides
* Planifolia
* Purpurea
* Pyramidalis Bertini
* Ramulosa
* Rotundifolia
* Rubra
* Rufa
* Rugosa
* Scampstoniensis
* Sericea
* Tiliaefolia
* Tortuosa
* Turkestanica
* Variegata Nova
* Virens

Fossil elms|

* U. okanaganensis

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