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Acacia imbricata

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Acacia imbricata F.Muell., Fragm . 1: 5 (1858)

Imbricate Wattle

Dense, spreading, glabrous shrub 1–2 m high; branches somewhat willowy. Branchlets strongly acutely angled towards apices, ribbed below phyllode insertion. Phyllodes crowded, erect, narrowly oblong or linear to oblanceolate, straight, 10–18 mm long, 1–2 (- 3) mm wide, l:w = 5–10, truncate and excentrically rostellate, imbricate, dark green; midrib not prominent; lateral nerves absent; gland adjacent to apical mucro. Inflorescences 1-headed, rudimentary racemes with axes c. 0.5 mm long, 1–2 per axil; peduncles 4–10 mm long, slender; heads prolific, globular, 9–15-flowered, bright golden. Flowers 5-merous; sepals free. Pods linear, straight, to 7 cm long, 4.5–6 mm wide, firmly chartaceous. Seeds longitudinal, oblong to broadly ovate-elliptic, 3.5–4 mm long, slightly ridged peripherally, shiny, dark brown; aril subterminal, clavate.

Restricted to the SE part of Eyre Penin., S.A., from the Yeelanna–Ungarra road S to Koppio and Warunda. Grows usually in sand in open forest, woodland or open scrub.

Considered conspecific with A. lineata by G.Bentham, Fl. Austral . 2: 354 (1864); the S.A. specimens cited by Bentham are A.imbricata, fide J.H.Maiden, J. & Proc. Roy. Soc. New South Wales 49: 497 (1916).

A member of the ‘ A. microcarpa group’ and perhaps not specifically distinct from A. triquetra which has narrower pods and broader, less regularly erect phyllodes.

Type of accepted name

Near Tumby Bay (sphalm. ‘Dombey-bay’, S.A., Dec. 1851, C.Wilhelmi ; holo: MEL674562; iso: K, MEL674564, PERTH (Fragment ex MEL).

Illustrations

M.Simmons, Acacias Australia 2: 87 (1988); D.J.E.Whibley & D.E.Symon, Acacias S . Australia 2nd edn, 63 (1992).

Representative collections

S.A.: Ungarra to Yeelanna road, B.Copley 2979 (AD); between Yalunda Flat and Tumby Bay, D.J.E.Whibley 1945 (AD).

(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