''Chorizema trigonum'' is a species of flowering plant in the family
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
''Chorizema trigonum'' is an erect, spindly shrub that typically grows to high and has
glabrous branches. Its leaves are linear to oblong, long, wide, and leathery with a with a short, down-turned point on the end. The flowers are arranged in
raceme
A raceme ( or ) or racemoid is an unbranched, indeterminate type of inflorescence bearing flowers having short floral stalks along the shoots that bear the flowers. The oldest flowers grow close to the base and new flowers are produced as the s ...
s in leaf axils or on the ends of branches, each flower on a
pedicel about long. The
sepals are softly-hairy and long, the upper two lobes joined for about half their length and curved. The flowers are orange, yellow and red, the
standard petal long,
wings long, and the
keel long. Flowering occurs from September to November.
Taxonomy
''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.
The
specific epithet
In taxonomy, binomial nomenclature ("two-term naming system"), also called nomenclature ("two-name naming system") or binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, bot ...
(''trigonum'') means "three-angled", referring to the stem.
Distribution and habitat
This species of pea grows in coastal areas in sandy or stony soils in the
Esperance Plains bioregion of southern Western Australia.
Conservation status
''Chorizema trigonum'' is listed as "not threatened" by the Western Australian Government
Department of Biodiversity, Conservation and Attractions.
References
{{Taxonbar, from=Q15528911
trigonum
Fabales of Australia
Endemic flora of Southwest Australia
Taxa named by Nikolai Turczaninow
Plants described in 1853