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Flora of Australia Online

Acacia aspera Lindl., in T.L.Mitchell, Three Exped. Australia 2: 138 (1838)
Rough Wattle.

T: Interior of New Holland [near Swan Hill, Vic.], 20 June 1836, T.L.Mitchell s.n. ; holo: CGE; iso: K, P.

Acacia strigosa Lindl., in T.L.Mitchell, Three Exped. Australia 2: 184 (1838), nom. illeg. , non Link (1822); A. densifolia Benth., London J. Bot. 1: 360 (1842); A. aspera var. densifolia (Benth.) Benth., Fl. Austral. 2: 347 (1864). T: interior of New Holland [Mt Zero, near the Wimmera R., Vic.], 20 July 1836, T.L.Mitchell s.n. and 260 ; syn: CGE, K.

Acacia erythrocephala A.Cunn. ex Benth., London J. Bot. 1: 362 (1842). T: Lachlan R., N.S.W., Apr. 1817, A.Cunningham 425 ; syn: K; banks of the Lachlan [R.], N.S.W., A.Cunningham s.n. ; syn: K.

Illustrations: F.J.H. von Mueller, Iconogr. Austral. Acacia dec. 4 (1887); L.F.Costermans, Native Trees & Shrubs SE Australia 183 & 310 (1981); G.M.Cunningham et al. , Pl. W New South Wales 353 (1981); T.Tame, Acacias SE Australia 115, fig. 116, pl. 116 (1992).

Spreading viscid shrub 0.5–2 m high. Branchlets ribbed, asperulous, hirsutellous to pubescent with at least some hairs gland-tipped. Stipules normally 1–2 mm long. Phyllodes oblong-linear to narrowly oblong-elliptic, usually 1–3 cm long, 2–4 (–7) mm wide, coriaceous, asperulous, with indumentum as on branchlets except sparser; midrib prominent. Inflorescences simple, 1 or 2 per axil; peduncles usually 2–10 mm long, usually stout, some hairs of indumentum normally gland-tipped; basal bract persistent; heads globular, usually 30–50-flowered, usually pale yellow to golden; buds usually burr-like in appearance due to acuminate exserted bracteoles. Flowers 5-merous; sepals united. Pods narrowly oblong to linear, rounded over seeds, curved, 2–6 cm long, 3–5 mm wide, firmly chartaceous to thinly coriaceous, densely hirsute-hirsutellous with some or all hairs gland-tipped. Seeds longitudinal, oblong, 4–5 mm long, shiny, dark brown; aril terminal. Fig. 83Q–T.

Discontinuous in south-eastern Australia, occurring from The Grampians to Warby Ra., Vic., northern A.C.T. and adjacent N.S.W., Peak Hill S to the Ardlethan–Temora area, and at Sutton Forest, N.S.W. Normally grows on ranges, in shallow stony or gravelly soil, in Eucalyptus open forest or mallee communities. Map 498.

N.S.W.: Jindalee, Sutton Forest, W. de Beuzeville (NSW252801); Herveys Ra. (sphalm. ‘Barker Ra.’), between Baldy and Peak Hill, E.Gordon (NSW78949). A.C.T.: Ginninderra, 26 Aug. 1968, C.Burgess (CANB). Vic.: Bendigo Whipstick, c. 12 km N of Bendigo, B.R.Maslin 5849 (PERTH); between Benalla and Glenrowan, 19 km SW of Wangaratta, N.Hall H79/98 (NSW, PERTH).

A variant from the Brisbane Ra., Vic., is recognised by its peduncles 7–15 mm long and slender, heads small, cream to pale lemon yellow, (15–) 24–35-flowered, and bracteoles not exserted in the buds (e.g. B.R.Maslin 3498 , CANB, MEL, PERTH).

A collection from Herveys Ra., N.S.W. (C.H.Pratten s.n. , NSW178724), with ±linear phyllodes 3–4.5 cm long and 2–3 mm wide, corresponds to the types of A. erythrocephala . This locality is at the northern extremity of the species range; ‘typical’ A. aspera also occurs in Herveys Ra. (see NSW78949 above).

Putative hybrids between A. aspera and possibly A. montana are noted by J.H.Willis, Victorian Naturalist 73: 157 (1957) and A.B.Court, in J.H.Willis, Handb. Pl. Victoria 2: 216 (1973). These plants occur in the Bendigo Whipstick and resemble A. montana in phyllode characters but possess bracteoles and stipules very similar to those of A. aspera (e.g. D.J.Paton 3 , MEL).

The pods of A. glandulicarpa also have gland-tipped hairs, but it has asymmetrically ovate to ovate-elliptic, 2-nerved phyllodes, usually fewer flowers per head and smaller, obliquely oriented seeds.

The Australian Plant Census recognises subspecies for this taxon since publication of the Flora of Australia treatment.

(B.R.Maslin)

Autonym

subsp. aspera

Published since the Flora of Australia treatment

subsp. parviceps

 

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