Family

Fabaceae

Distribution

Discontinuous, occurring in Kalbarri Natl Park, between Mullewa and Morawa and near Bindi Bindi, south-western W.A.

Description

Shrub to 1.5 m high, dense. Branchlets glabrous. Phyllodes sessile, decurrent on branchlets, erect, straight, ±terete to slightly rhombic in section, 6–12 (–17) cm long, 1–1.5 mm diam., long-tapering pungent, rigid, glabrous except tomentulose adaxially at extreme base, closely striate-nerved with nerves at the 4 angles slightly broader than the rest. Inflorescences simple, commonly 2 per axil; peduncles 2–3 mm long, glabrous or puberulous basally; heads obloid, 6–9 mm long, 6 mm diam., densely flowered, golden. Flowers 5-merous; sepals 2/3–3/4-united. Pods linear, slightly raised over and constricted between seeds, straight, to 9 cm long, 2–2.5 mm wide, coriaceous to crustaceous, longitudinally nerved, glabrous. Seeds longitudinal, oblong to broadly elliptic, 2.5–3 mm long, glossy, mottled brown; aril translucent yellow.

Habitat

Usually grows in loam and laterite in mixed scrub.

Specimens

W.A.: Junga Dam, Kalbarri, D. & B.Bellairs 1633 (CANB, PERTH); 50 km from Mullewa towards Morawa, B.R.Maslin 3358 (CANB, K, NSW, NY, PERTH); 4 km S of Bindi Bindi towards Calingiri, B.R.Maslin 5363 (PERTH).

Notes

Formerly confused with A. sibina which has pulvinate phyllodes, longer spikes and larger pods and seeds.

FOA Reference

Data derived from Flora of Australia Volumes 11A (2001), 11B (2001) and 12 (1998), products of ABRS, ©Commonwealth of Australia

Author

R.S.Cowan