Bossiaea arcuata J.H.Ross

Scientific Description

Genus Bossiaea. Form erect. Habit shrub, spindly shrub (broom-like). Stems Indumentum glabrous, Pustules or glands absent, Striation (stems ribbed) not striate, Cross section terete, Spiny on any part of plant spiny at least in part. Leaves or phylloclades Presence clearly present, Position alternate, Leaves simple, Leaves or phylloclade continuous with stem not continuous with stem, Cross section of leaf or leaflet flat with flat margins, Margins of leaf or leaflet entire, Tuberculate tubercles absent, Pustules or glands absent. Length Leaf length 3.5-5.5. Width (entire leaves only) Leaf width 0.8-1. Scale leaves length mm long NaN (?). Indumentum Presence glabrous. Stipules Presence present and persistent to older leaves, Glands with glands (?) or without glands (?), Ribs ribbed (?) or ribless (?). Length Stipule length NaN (?). Bracteoles Presence present and persistent (?), absent (?) or present but early deciduous (?), Indumentum hairy (?) or glabrous (?), Striation striate (?) or not striate (?). Length Bracteole length NaN (?). Pedicel Presence present, Indumentum glabrous. Length Pedicel length 5.5-8. Calyx Pustules or glands absent, Ribs ribless, Enlarged in fruit not accrescent. Length Calyx length 5-6.5. Indumentum Presence glabrous. Corolla Colour patterning multicoloured, Colour (when multicoloured - choose one colour) yellow or red, Colour (when multicoloured - choose a second colour) yellow or red, Petal claws ( the narrow base of the petals present. Length Corolla length 10-12. Indumentum Presence absent. Standard Indumentum glabrous, Auricles not auriculate. Length Standard length 8-11. Wings Auricles not auriculate. Length Wing length 7-11. Keel Auricles not auriculate, Indumentum glabrous, Beak not beaked. Length Keel length 8-10. Stamens Number ten. Anthers anther length 0.4-0.5, Position at two different levels (filaments alternately long and short). Filaments Fusion united in an open sheath. Length Filament length 7-11. Ovary Placement stipitate. Indumentum Presence hairy or glandular. Style Indumentum hairy or glandular towards the base, Bearded ( with a tuft of hairs at apex ) not bearded, Apex terete. Length Style length 10-12. Fruit Type dehiscent (a pod or follicle), Constriction not constricted between the seeds, Compression flat or compressed, Placement stipitate, Beak not beaked. Length Fruit length 20-35. Width Fruit width 3.5-5. Indumentum Presence glabrous. Flowering time March, April, September or October. Distribution Botanical Province Eremaean, IBRA Bioregion Coolgardie. Conservation Code Priority One (P1).