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Acacia trinervata

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Acacia trinervata Sieber ex DC., Prodr . 2: 451 (Nov. 1825)

Three-nerved Wattle

Shrub or tree 1–6 m high. Branchlets angular apically, later terete with low ridges, glabrous except commonly with minute resin-hairs. Phyllodes sessile, patent to inclined, linear to linear-lanceolate, straight to incurved, 1–4 cm long, 1–3 mm wide, coarsely pungent, acute, mucronate, rigid-coriaceous, glabrous, with 2 or 3 raised, distant main nerves and rare anastomoses. Inflorescences simple; peduncles 7–18 mm long, glabrous except for resin-hairs; heads globular, 3.5–5.5 mm diam., 24–45-flowered, golden. Flowers 5-merous; sepals 1/2–3/4-united. Pods linear, slightly raised over seeds, straight or slightly curved, to 12 cm long, 2–4 mm wide, coriaceous, glabrous. Seeds longitudinal, oblong, 3.5–5.5 mm long, dark brown or black; aril apical.

Restricted to western Sydney and adjacent lower Blue Mtns, N.S.W. Grows on sandstone in eucalypt communities.

See R.S.Cowan & B.R.Maslin, Nuytsia 10: 82- 83 (1995), for discussion of nomenclature and synonomy.

Perhaps related to A. elongata ; possibly also to A. bynoeana . Possibly hybridises with A. implexa .

Type of accepted name

[N.S.W., 1823], F.W.Sieber 445 ; holo: G-DC; iso: A, BM, FI, K, MO, NSW, NY, PERTH (Fragment ex G-DC), PR, STR, W.

Synonymy

Acacia taxifolia A.Cunn., in B.Field, Geogr. Mem. New South Wales 344 (Apr. 1825), nom. illeg., non Willd. (1806); A. cunninghamii Sweet, Hort. Brit . 2nd edn, 164 (1830); A. cunninghamii Don, Gen. Hist . 2: 404 (1832), superfluous comb.; A. cunninghamii Steud., Nomencl. Bot . 2nd edn, 1: 4 (1840), superfluous comb. Type: eastern ascent of Blue Mtns, N.S.W., Oct. 1822, A.Cunningham 215 ; holo: K; iso: A, BM, K.

Acacia trinervata var. brevifolia Benth., Fl. Austral. 2: 325 (1864). Type: Blue Mtns, [N.S.W.], no collector or date indicated; lecto: K, fide R.S.Cowan & B.R.Maslin, Nuytsia 10: 82 (1995).

Acacia trinervata var. angustifolia Benth., Fl. Austral. 2: 325 (1864); A. elongata var. a ngustifolia (Benth.) Maiden & Betche, in J.H.Maiden, Wattles & Wattle-barks 3rd edn, 58, 73 (1906), as to name only, see R.S.Cowan & B.R.Maslin, Nuytsia 10: 82 (1995). Type: Blue Mtns., N.S.W., Miss [C.L.W.] Atkinson ; holo: K; iso: NSW (Fragment ex K), PERTH (Fragment ex K).

[ Acacia genistifolia auct. non Link: G.Bentham, London J. Bot . 1: 335 (1842)]

Illustrations

M.Simmons, Acacias Australia 2: 39 (1988); T.Tame, Acacias SE Australia 77, fig. 62, pl. 62 (1992).

Representative collections

N.S.W.: East Kurrajong, R.Coveny 4100 & R.Bisby (A n.v. , AD n.v. , BRI n.v. , CANB n.v. , K n.v. , L n.v. , NSW, PERTH, U n.v. , US n.v. ).

(RSC)

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