Family

Fabaceae

Distribution

Disjunct, occurring from near Morawa SE to Cunderdin, with a southern variant occurring from Lake Johnston area (which is c. 100 km W of Norseman) E to Norseman and Moir Rock, W.A.

Description

Shrub 0.5–2 m high, diffuse, low spreading, domed or flat-topped. Stipules triangular. Phyllodes 4.5–13 cm long, with 5–7 equally prominent nerves; pulvinus 1–2 (–3.5) mm long, cylindrical to slightly flared basally, strongly rugose transversely, ±minutely puberulous with red resin-hairs. Flower-heads normally cylindrical, rarely obloid in southern variant, 1–3 cm long, sessile or rarely with glabrous or appressed-puberulous peduncles to 2 mm long.

Habitat

Northern populations grow in sand and laterite, and southern populations grow in sandy loam, often near granite, in scrub and shrubland.

Specimens

W.A.: Swan R. Colony, J.Drummond 16 (G, OXF, P, PERTH); 8 km E of Coorow towards Latham, B.R.Maslin 94 (PERTH); Moir Rock, c. 60 km due SW of Norseman, B.R.Maslin 2488 (CANB, NY, PERTH); Manners Valley, 15 km SE of Morawa, B.R.Maslin 6592 (PERTH); McDermid Rock, c. 100 km W of Norseman. K.Newbey 5263 (PERTH).

Notes

Similar to A. incongesta.

The variation in the typical subspecies suggests that there are two poorly defined populations, neither of which we consider worth recognising formally; see R.S.Cowan & B.R.Maslin, Nuytsia 10: 50 (1995), for further discussion.

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

Minor edits by B.R.Maslin, J.Reid & J.Rogers