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Acacia amyctica

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Acacia amyctica R.S.Cowan & Maslin, Nuytsia 10: 222 (1995)

Obconic shrub 0.7–1.5 m high. Bark smooth, light-grey. Branchlets slightly ribbed, sparsely appressed-puberulous. Phyllodes ascending to erect, narrowly oblanceolate to elliptic-oblanceolate, straight to slightly curved, 1.5–2.5 cm long, 2.5–4 mm wide, l:w = 3.5–7, with an acute or subobtuse, mucronate, sharply to coarsely pungent apex, rigid, glabrous, with numerous closely parallel, raised nerves paler than internerve spaces; stomata distinct, raised; gland 1, basal. Inflorescences simple, 2 per axil; peduncles 4–7 mm long, appressed-puberulous or glabrous; heads globular, 3–3.5 mm diam., 18–25-flowered, golden; bracteoles obovate to spathulate. Flowers 5-merous; sepals free. Pods linear, not constricted between seeds, strongly curved to openly 1- 1 1/2-coiled, to 6 cm long, 3 mm wide, firmly chartaceous, glabrous. Seeds longitudinal, not seen.

Occurs in the Salmon Gums- Grass Patch area (between Norseman and Esperance) and also Peak Charles Natl Park (about 50 km due W of Salmon Gums) and near Dunn Swamp (c. 80 km due NE of Ravensthorpe), south-western W.A. Grows in loam and on sandy clay plains in low woodland and open shrubland.

A member of the ‘ A. ancistrophylla group’, differing from other members of the group in its sharply to coarsely pungent phyllodes with the nerves strong, discrete and paler than internerve spaces. Also resembles A. whibleyana but that species, in addition to being well-separated geographically, has wider fruits in which the seeds are arranged obliquely and phyllodes with immersed nerves and obscure stomata. There is a superficial resemblance to A. hadrophylla , which has non-pungent phyllodes and shorter peduncles.

Type of accepted name

1 km N of Salmon Gums on Coolgardie- Esperance Highway, W.A., 25 Sept. 1983, B.R.Maslin 5448 ; holo: PERTH; iso: MO, NY, distributed as A. ancistrophylla .

Representative collections

W.A.: 24.75 km W of Grass Patch, 23.4 km W of Norseman- Esperance Hwy on Grass Patch road, M.A.Burgman 1885 & S.McNee (PERTH); 11.5 km N of Salmon Gums towards Norseman, B.R.Maslin 2456 (CANB, PERTH); 4 km S of Peak Eleanora, Peak Charles Natl Park, c. 45 km W of Salmon Gums, K.Newbey 6340 (PERTH); 15 km E of Dunn Swamp, c. 80 km NE of Ravensthorpe, K.Newbey 8132 (PERTH).

(RSC & 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 11 September 2018