Acacia leioderma Maslin, Nuytsia 1: 442; 443, fig. 17 & 488, map 7 (1975)
Shrub 0.5- 2 m high. Branchlets prominently ribbed, commonly red to brown, glabrous. Stipules 2.5- 4 mm long. Pinnae mostly 2 pairs, 3- 4 mm long (proximal pinnae), 10- 30 mm long (distal pinnae); petiole 1- 2 mm long; rachis 3- 10 mm long, prominently ribbed adaxially; pinnules 2 pairs (proximal pinnae), 4- 10 pairs (distal pinnae), narrowly oblong, 5- 12 mm long, 1.5- 5 mm wide, flat or slightly recurved, green, glabrous; gland on rachis at base of pinnae, sessile, prominent, additional smaller glands normally on distal pinna-rachae at base of uppermost 1- 2 pairs of pinnules. Inflorescences simple, 1- 3 per axil; peduncles 10- 20 mm long, glabrous; heads globular, large, 28- 35-flowered, light golden. Flowers 5-merous; calyx often dark brown, the sepals 5/6-united; petals 1-nerved. Pods 3- 4 cm long, 6- 8 mm wide, glabrous. Seeds transverse, oblong to elliptic, 2- 3 mm long.
Occurs from the Mount Barker- Albany area E to Fitzgerald R. Natl Park, south-western W.A. Favours sandy loam near watercourses in forest, also grows on laterite, mostly in coastal heath, scrub and shrubland.
A member of the ‘ Acacia browniana group’ most closely related to A. empelioclada . Specimens from the eastern extremity of the range, i.e. Fitzgerald R. Natl Park, may ultimately prove to be glabrous variants of A. empelioclada . See also A. nigricans .
Type of accepted name
21 km from Denmark towards Mount Barker, W.A., 21 Sept. 1972, B.R.Maslin 2955 ; holo: PERTH; iso: CANB, K, MEL, NY.
[ Acacia nigricans auct. non (Labill.) R.Br.: R.Brown, in W.T.Aiton, Hortus Kew. 2nd edn, 5: 465 (1813); J.Sims, Bot. Mag. t. 2188 (1820); C.F.Meissner, in J.G.C.Lehmann, Pl. Preiss. 1: 20 (1844) p.p. , as to L.Preiss 887 (C, GOET, G-DC, HBG, K, L, LUND, M, MEL, MO, NY, P, STR, W); K.Koch, Allg. Gartenzeitung 26: 195 (1858); G.Bentham, Fl. Austral. 2: 418 (1864)]
[ Acacia rutaefolia auct. non Link: J.H.F.Link, Enum. Hort. Berol. Alt. 2: 444 (1822); W.T.Aiton, Ann. Blumisterei Gartenbesitz 58, tab. (1827); G. Bentham, Fl. Austral. 2: 418 (1864), pro syn. ]
J.Sims, loc. cit. ; W.T.Aiton, loc. cit. , as A. rutaefolia ; B.R.Maslin, loc. cit .
W.A.: King George Sound, R.Brown ‘4320’ (BM, K); Swan R., J.Drummond 5: 18 (FI, G-DC: sphalm. ‘coll. 4’, K, MEL, OXF, P, PERTH); Mt Manypeaks, D.Edinger 226B (PERTH); lower Fitzgerald R., A.S.George 9922 (PERTH).