Acacias of Australia

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Acacia angusta Maiden & Blakely




Discontinuous from the Gogango Ra. near Rockhampton W to near the Drummond Ra., Qld.


Tree or shrub 3–6 m high. Branchlets red-brown, glabrous to appressed-puberulous. Phyllodes linear, usually 9–20 cm long and 1.8–3 mm wide, narrowed towards often ±uncinate apex, thin, glabrous to subglabrous, 1-nerved per face; lateral nerves absent or indistinct; glands prominent, exserted, 1–3, with lowermost usually 1–4 mm above pulvinus. Inflorescences racemose; raceme axes 1–3 cm long, slender, appressed-puberulous; heads globular, 12–20 flowered, bright yellow; peduncles 2–5 mm long, appressed-puberulous. Flowers 5-merous; sepals free. Pods linear, rounded on opposite sides over alternate seeds, to 14 cm long, c. 5 mm wide, thinly coriaceous, dark brown to blackish, with yellow margins, glabrous. Seeds longitudinal, oblong-ovate, 4–5 mm long; funicle sometimes partially encircling seed in a single fold, very pale red-brown; aril clavate.


Qld: 67 km from Rolleston towards Springsure, I.B.Armitage 833 (NSW, PERTH); Mt Morgan, D.A.Goy 323 (BRI, NSW); c. 5 km from Springsure on road to The Gap, B.O’Keefe 839 (BRI, PERTH); c. 30 km E of Duaringa, N.Hall H78/70 (NSW, PERTH).


L.Pedley, Austrobaileya 1: 289 (1980), referred to two aberrant specimens: one from Clermont (phyllodes 8–9 cm long and 4 mm wide with l:w = 18–23), the other from West Mt Morgan (phyllodes to 5 mm wide with gland 1–3 cm above the base).

The funicle suggests affinities with the ‘A. microbotrya group’; it may resemble narrow phyllode forms of A. pustula, especially on account of its prominent glands.

FOA Reference

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