Jacksonia spinosa (Labill.) Sm.

Scientific Description

Erect, shrub, spindly shrub (broom-like). Stems flattened, not spiny, glabrous; pustules or glands absent. Leaves or phylloclades absent or apparently so (reduced to scales), alternate, not continuous with stem, hairy, with simple hairs, flat with flat margins; margins entire; tubercles absent, 0.5-2; pustules or glands absent. Stipules apparently absent even from the youngest leaves. Pedicel present, 2-3 mm long, hairy. Bracteoles present and persistent, 1.2-1.5 mm long, hairy, not striate. Calyx 5-6.5 mm long, not accrescent, hairy, with simple hairs, ribless; pustules or glands absent. Corolla 5.5-7 mm long, multicoloured, mostly yellow or orange, with some yellow or orange spots, streaks or blotches; claws present; standard 5-6 mm long, glabrous, not auriculate, wings 4-5 mm long, not auriculate, keel 5-6 mm long, not beaked, not auriculate, glabrous. Stamens ten; anthers 0.3-0.4 mm long, at two different levels (filaments alternately long and short); filaments free (or united at the very base), 3.5-4 mm long. Ovary stipitate, hairy or glandular; style 5-6 mm long, hairy or glandular towards the base, not bearded, terete. Fruit dehiscent (a pod or follicle), not constricted between the seeds, round in cross-section, hairy, with simple hairs. Flowers in January, February, March, April, May, June, July, August, September, October, November and December. Occurs in the South-West Botanical Province, in the Avon Wheatbelt, Jarrah Forest, Mallee, Warren, Esperance and Swan Coastal Plain IBRA regions.