Daviesia pachyphylla

Species of flowering plant

Ouch bush

Daviesia pachyphylla in the Fitzgerald River National Park
Scientific classification
Kingdom:  | Plantae
Clade:  | Tracheophytes
Clade:  | Angiosperms
Clade:  | Eudicots
Clade:  | Rosids
Order:  | Fabales
Family:  | Fabaceae
Subfamily:  | Faboideae
Genus:  | Daviesia
Species:  |

D. pachyphylla

Binomial name
Daviesia pachyphylla

F.Muell.[1]

Daviesia pachyphylla, commonly known as ouch bush,[2] is a species of flowering plant in the family Fabaceae and is endemic to the south of Western Australia. It is usually a slender shrub with often arching branchlets, crowded, sharply-pointed, narrowly conical phyllodes, and yellow to orange and dark reddish-brown flowers.

## Description

[edit]

Daviesia pachyphylla is usually a slender shrub that typically grows to a height of up to 1.5 m (4 ft 11 in) and often has arching branchlets. Its phyllodes are crowded with overlapping bases, 12–27 mm (0.47–1.06 in) long and 4–10 mm (0.16–0.39 in) wide with a sharply pointed tip. The flowers are arranged in groups of two to seven in leaf axils on a thick peduncle 0.5–5 mm (0.020–0.197 in) long, the rachis 1.25–6.0 mm (0.049–0.236 in) long with bracts 0.5–2 mm (0.020–0.079 in) long at the base. Each flower is on a pedicel 2.0–4.5 mm (0.079–0.177 in) long, the sepals 3.5–4.0 mm (0.14–0.16 in) long and joined for most of their length. The standard petal is heart-shaped, 5.5–6.0 mm (0.22–0.24 in) long and 6.5–8.0 mm (0.26–0.31 in) wide, and yellow with a dark reddish-brown centre, the wings 4.5–7.0 mm (0.18–0.28 in) long and dark reddish-brown, the keel 4–5 mm (0.16–0.20 in) long and dark reddish-brown. Flowering occurs from July to October and the fruit is a flattened, triangular pod 13–14 mm (0.51–0.55 in) long.[3][2]

## Taxonomy and naming

[edit]

Daviesia pachyphylla was first formally described in 1863 by Ferdinand von Mueller in Fragmenta Phytographiae Australiae from specimens collected by George Maxwell.[4][5] The specific epithet (pachyphylla) means "thick-leaved".[6]

## Distribution and habitat

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Ouch bush grows in heath on laterite between the Fitzgerald River National Park, Ongerup,  Ravensthorpe and Munglinup in the Esperance Plains and Mallee biogeographic regions of Southwestern Australia.[3][2]

## Conservation status

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Daviesia pachyphylla is listed as "not threatened" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions.[2]

## References

[edit]

1. ^ "Daviesia pachyphylla". Australian Plant Census. Retrieved 16 March 2022.
2. ^ a b c d "Daviesia pachyphylla". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
3. ^ a b Crisp, Michael D.; Cayzer, Lindy; Chandler, Gregory T.; Cook, Lyn G. (2017). "A monograph of Daviesia (Mirbelieae, Faboideae, Fabaceae)". Phytotaxa. 300 (1): 281–283\. doi:10.11646/phytotaxa.300.1.1.
4. ^ "Daviesia pachyphylla". APNI. Retrieved 15 March 2022.
5. ^ von Mueller, Ferdinand (1863). Fragmenta Phytographiae Australiae. Vol. 4\. Melbourne: Victorian Government Printer. pp. 15–16. Retrieved 16 March 2022.
6. ^ Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 269\. ISBN 9780958034180.

Taxon identifiers

Daviesia pachyphylla|

* Wikidata: Q15532682
* APNI: 83243
* CoL: 6CG97
* EoL: 644768
* FloraBase: 3830
* GBIF: 2956027
* iNaturalist: 525375
* IPNI: 491101-1
* IRMNG: 10582325
* NCBI: 233833
* Open Tree of Life: 739658
* Plant List: ild-34783
* POWO: urn:lsid:ipni.org:names:491101-1
* Tropicos: 13050969
* WFO: wfo-0000188251