Indigofera psammophila Peter G.Wilson

Scientific Description

Erect, herb. Stems terete, not spiny, hairy; pustules or glands absent. Leaves or phylloclades clearly present, compound, alternate, continuous with stem, 15-30 mm long, hairy, with simple hairs, flat with flat margins; margins entire; tubercles absent, leaflets 7-9, pinnately arranged, terminal leaflet present, stalked; pustules or glands absent. Stipules present and persistent to older leaves. Pedicel present, 0.5-0.7 mm long, hairy. Bracteoles present but early deciduous. Calyx 2.5-3 mm long, not accrescent, hairy, with simple hairs, ribless; pustules or glands absent. Corolla 6-6.8 mm long, multicoloured, mostly pink, purple or blue, with some pink, purple or blue spots, streaks or blotches; claws absent; standard 5-5.6 mm long, hairy at least in part, not auriculate, wings 4-4.8 mm long, not auriculate, keel 5-6 mm long, not beaked, not auriculate, hairy at least in part. Stamens ten; anthers 0.6-1 mm long, at two different levels (filaments alternately long and short); filaments united in an open sheath with one free stamen, 3-4.6 mm long. Fruit dehiscent (a pod or follicle), sessile or subsessile, not constricted between the seeds, round in cross-section, not beaked. Flowers in May, August and September. Occurs in the Eremaean Botanical Province, in the Coolgardie IBRA regions.