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Acacia exocarpoides

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Acacia exocarpoides W.Fitzg., J. Western Australia Nat. Hist. Soc . 2 (1): 7 (1904)

Fastigiate, glabrous shrub 2–3 m high. Ultimate branchlets ascending to erect, rather straight and sparingly divided, terete, finely striate, ash-grey with an often flaking cuticle, pale green when young, coarsely spinose. Phyllodes inconspicuous, sparse, erect, frequently shed (especially upon collection), terete, 8–18 mm long, 1 mm wide, narrowed at base, acute, scarcely pungent, 4-nerved. Inflorescences rudimentary normally 1-headed racemes with axes to c. 1 mm long; peduncles 5–10 mm long which often grows out at anthesis; heads globular, 28–35-flowered, golden; buds sometimes obloid. Flowers 5-merous; sepals variably united from near the base to c. 1/2-united, the lobes oblong to narrowly oblong. Pods submoniliform, to 15 cm long, 5–7 mm wide, thinly coriaceous, dark brown. Seeds longitudinal, ovate, sometimes oblong, 4–6 mm long, shiny, dark brown to blackish; aril dull yellow, waxy, as long as seed.

Discontinuous in the south-western Arid Zone, occurring near Meekatharra, in the Mt Gibson- Mullewa- Mt Magnet area, and the Rutters Soak- Rason Lake area of the Great Victoria Desert, W.A. Grows in rocky clayey loam, commonly in Mulga ( A. aneura ) communities.

Superficially resembling A. deficiens and A. microcalyx , especially in its terete branchlets and few phyllodes. Also similar to A. wilcoxii .

Type of accepted name

Near Lennonville (between it and Boogardie), W.A., Sept. 1903, W.V.Fitzgerald s.n .; lecto: NSW, fide B.R.Maslin & R.S.Cowan, Nuytsia 9: 391 (1994); isolecto: NSW, PERTH.

Representative collections

W.A.: Meekatharra Airport, A.M.Ashby 4223 (BRI, CANB, PERTH); near Wurarga at Mullewa-Yalgoo Shire boundary, A.M.Ashby 5160 (BRI, MEL, NSW, PERTH); Mt Gibson, D.G.Fell 0226 (NSW, PERTH); 17 miles [27.2 km]E of Rutters Soak, A.S. George 4628 (PERTH); Great Victoria Desert, c. 34 km due SSE of SE end of Rason Lake, B.R.Maslin 5719 (PERTH).

(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