Common name: Costin's Wattle
Acacia costiniana Tindale APNI*
Description: Erect or spreading shrub 0.6–2 m high, often multistemmed and branches weeping; bark smooth; branchlets ± terete, densely hairy. Stipules usually persistent.
Phyllodes often crowded, ± asymmetrically elliptic to ovate, 0.5–2 cm long, 3–10 mm wide, sparsely to moderately hairy with appressed straight to crisped hairs, midvein prominent, lateral veins obscure, margins undulate, apex acute with a mucro; 1 gland at base; pulvinus usually 0.5–1 mm long.
Inflorescences 1 in axil of phyllodes or 1–10 in an axillary raceme; axis 0.5–3 cm long; peduncles 1.5–10 mm long, minutely hairy; heads ± ovoid to globose, 0.5–1 cm long, 15–25-flowered, yellow to bright yellow.
Pods ± straight, ± flat, ± straight-sided, 1.5–5.5 cm long, 7–12 mm wide, thinly leathery, rusty-velvety becoming silvery rusty; seeds transverse or oblique; funicle expanded towards seed.
Distribution and occurrence: from Captains Flat to the Bombala district.
Grows in dry sclerophyll forest, woodland and heath, often on rocky slopes.
NSW subdivisions: ST
Threatened species: ROTAP: 3RCa
Related to Acacia lucasii which has larger, flat phyllodes and lacks stipules. Named after Alec Baitllie Costin, formerly of the CSIRO.
Text by P.G. Kodela
Taxon concept: P.G. Kodela & G.J. Harden, Flora of NSW Vol. 2 (2002)
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