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Acacia rostellata

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Acacia rostellata Maslin, Nuytsia 12: 392 (1999)

Spreading, often domed, much-branched shrub 0.1–0.5 m high. Branchlets often pungent, hirtellous to pubescent, with hairs infrequently appressed. Phyllodes inequilaterally obtriangular to obdeltate, with upper margin forming a prominent rounded angle above middle of phyllode and lower margin ending in a straight or shallowly recurved, pungent mucro, 3–6 mm long, 2–4 mm wide, hirtellous, occasionally subglabrous, main nerve prominent or obscure and central or towards abaxial margin, other nerves absent or few and obscure; gland 1–3 mm above base. Inflorescences rudimentary, 1-headed racemes with axes to c. 1 mm long; peduncles 4–10 mm long, hairy or glabrous; basal bracts 2 or 3, brown; heads globular, 3–4 mm diam., 8–15-flowered, lemon yellow or golden; bracteoles absent. Flowers mostly 5-merous; sepals 1/2–3/4-united. Pods prominently rounded over seeds on alternate sides, curved to openly once-coiled, to 3 cm long, 3–3.5 mm wide, thinly coriaceous, glabrous or hairy. Seeds longitudinal, plano-convex, 2.5–3 mm long, dull, black, rugulose; aril terminal.

Scattered from Bruce Rock S to near Ongerup and E to near Lake King and Speddingup (N of Esperance), south-western W.A. Grows in sand, sandy gravel, gravel, sandy clay and clay, in heath under open eucalypt scrub.

Possibly with affinity to A. spinosissima . Superficially similar to A. aristulata .

Type of accepted name

18 km from Lake King towards Ravensthorpe, W.A., 6 Oct. l975, B.R.Maslin 3868 ; holo: PERTH; iso: CANB, K, MEL, NY.

Representative collections

W.A.: Bruce Rock, Sept. 1933, E.T.Bailey s.n. (PERTH); 32 km NE of Ongerup, K.Newbey 3667 (PERTH); 16- 19 km from Lake King along road to Lake Grace, A.Strid 21069 (AD, BRI, NSW, PERTH, W, Z).

(BRM)

WATTLE Acacias of Australia CD-ROM graphic

The information presented here originally appeared on the WATTLE CD-ROM which was jointly published by the Australian Biological Resources Study, Canberra, and the Department of Parks and Wildlife, Perth; it was produced by CSIRO Publishing from where it is available for purchase. The WATTLE custodians are thanked for allowing us to post this information here.

Page last updated: Tuesday 24 August 2021