Acacia costiniana Tindale, Telopea 1: 441; 443, pl. 23 (1980)
Weeping, multistemmed shrub 0.6–2.5 m high. Branchlets puberulous. Stipules 1–3 mm long. Phyllodes crowded, mostly ascending to erect, asymmetrically ovate to elliptic, 1–2 cm long, 5–11 mm wide, with unequal base, mostly undulate, acute- to obtuse-mucronate, coriaceous, with indumentum of fine, sparse, straight, appressed hairs; midrib slightly excentric; lateral nerves obscure; gland not prominent, 0–1 mm above pulvinus. Inflorescences simple or racemose; raceme axes 1–3 cm long; peduncles 1.5–10 mm long, puberulous; heads obloid to subglobular, to 6 mm long, 14–26-flowered, golden or rich lemon yellow. Flowers normally 5-merous; sepals 1/2- 2/3-united. Pods narrowly oblong, to 5 cm long, 10–12 mm wide, thinly coriaceous, velvety with ferruginous to silvery-ferruginous hairs. Seeds transverse to oblique, ovate to oblong-elliptic, 4–6 mm long, somewhat shiny, black; aril clavate.
Restricted to the Tinderry Mtns, south-eastern N.S.W. Grows on usually granitic slopes or in sheltered gullies, sometimes in heath on edges of swamps, in Eucalyptus forest or woodland, at about 1200 m alt..
Allied to the more southerly distributed A. lucasii which has non-pendulous branchlets and normally larger, tomentulose phyllodes, see protologue of A. costiniana for further details. These two species share with A. dorothea the unusual combination of characters of 1-nerved phyllodes and obloid flower-heads.
Type of accepted name
Tinderry Mtns, 13.2 km by road SSE of Michelago on the Jerangle road, N.S.W., 2 Aug. 1975, R.Coveny 6586, P.Hind & M.Parris ; holo: NSW; iso all n.v .: BRI, CANB, K, L, US.
M.D.Tindale, loc. cit. ; T.Tame, Acacias SE Australia 169, fig. 191, pl. 191 (1992).
N.S.W.: Tinderry Mtns, 9 km ESE of Michelago, L.G.Adams 2402 (NSW); Tinderry Mtns, 13.2 km by road ESE of Michelago, R.Coveny 6582 et al. (NSW, PERTH).