Chorizema trigonum

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Chorizema trigonum

Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Fabales
Family:	Fabaceae
Subfamily:	Faboideae
Genus:	Chorizema
Species:	C. trigonum
Binomial name
*Chorizema trigonum* Turcz.^[1]

Chorizema trigonum is a species of flowering plant in the family Fabaceae and is endemic to the south of Western Australia. It is an erect, spindly shrub with linear to oblong leaves and orange, red and yellow flowers.

Description

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Chorizema trigonum is an erect, spindly shrub that typically grows to 0.3–1 m (1 ft 0 in – 3 ft 3 in) high and has glabrous branches. Its leaves are linear to oblong, 29–60 mm (1.1–2.4 in) long, 6–20 mm (0.24–0.79 in) wide, and leathery with a with a short, down-turned point on the end. The flowers are arranged in racemes in leaf axils or on the ends of branches, each flower on a pedicel about 2 mm (0.079 in) long. The sepals are softly-hairy and 7.5–9.4 mm (0.30–0.37 in) long, the upper two lobes joined for about half their length and curved. The flowers are orange, yellow and red, the standard petal 10–12 mm (0.39–0.47 in) long, wings 10–11 mm (0.39–0.43 in) long, and the keel 9.8–10.0 mm (0.39–0.39 in) long. Flowering occurs from September to November.^[2]^[3]

Taxonomy

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Chorizema trigonum was first formally described in 1853 by Nikolai Turczaninow in the Bulletin de la Société Impériale des Naturalistes de Moscou from specimens collected by James Drummond.^[4]^[5] The specific epithet (trigonum) means "three-angled", referring to the stem.^[6]

Distribution and habitat

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This species of pea grows in coastal areas in sandy or stony soils in the Esperance Plains bioregion of southern Western Australia.^[3]

Conservation status

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Chorizema trigonum is listed as "not threatened" by the Western Australian Government Department of Biodiversity, Conservation and Attractions.^[3]

References

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^ "Chorizema trigonum". Australian Plant Census. Retrieved 8 November 2023.
^ Bentham, George (1864). Flora Australiensis. Vol. 2. London: Lovell Reeve & Co. p. 30. Retrieved 8 November 2023.
^ ^a ^b ^c "Chorizema trigonum". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
^ Turczaninow, Nikolai (1853). "Chorizema humile". Bulletin de la Société Impériale des Naturalistes de Moscou. 26 (1): 254. Retrieved 8 November 2023.
^ "Chorizema trigonum". APNI. Retrieved 8 November 2021.
^ Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 327. ISBN 9780958034180.

Taxon identifiers
Chorizema trigonum	Wikidata: Q15528911 APNI: 67376 CoL: 5YD33 EoL: 644575 FloraBase: 3762 GBIF: 2968197 IPNI: 486266-1 IRMNG: 11186068 Open Tree of Life: 3920901 Plant List: ild-34579 POWO: urn:lsid:ipni.org:names:486266-1 Tropicos: 13049369 WFO: wfo-0000188040

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