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Flora of Australia Online

Acacia cyperophylla F.Muell. ex Benth., Fl. Austral. 2: 400 (1864)

Racosperma cyperophyllum (F.Muell. ex Benth.) Pedley, Austrobaileya 2: 347 (1987). T: Cooper’s Creek, S.A., 1858, A.C.Gregory ; lecto: MEL, fide L.Pedley, Austrobaileya 1: 126 (1978); isolecto: NSW, PERTH; paralecto: see Acacia curranii .

Illustrations: F.J.H. von Mueller, Iconogr. Austral. Acacia dec. 10 [pl. 6] (1888), as to central twig, fide J.H.Maiden, J. & Proc. Roy. Soc. New South Wales 49: 494 (1916); J.H.Maiden, Forest Fl. New South Wales 7(10): pl. 227 (1917); A.A.Mitchell & D.G.Wilcox, Arid Shrubland Pl. Western Australia 272 & 273 (1988); D.J.E.Whibley & D.E.Symon, Acacias S. Australia 2nd edn, 269 & 271 (1992); K.A.W.Williams, Native Pl. Queensland 4: 15 (1999).

Shrub or usually tree to 12 m high, multistemmed, resinous. Bark ‘Minni Ritchi’, reddish or ±salmon-coloured. Branchlets spreading-erect or pendulous, grey-waxy over reddish surface, glabrous or sparsely appressed-pubescent. Phyllodes ±erect or pendulous, straight or shallowly curved, terete to subterete, rarely flat, 7–28 cm long, normally 0.8–2 mm wide, appressed-puberulous (often sparsely so), pungently pointed, finely multistriate; nerves longitudinal, numerous, parallel, closely-spaced, inconspicuous, non-anastomosing; gland 1, minute, basal. Spikes 1–3 cm long, interrupted, pale yellow. Flowers 5-merous; calyx 0.8–1.5 mm long, dissected by 1/3 to 1/4, fimbriolate or sparsely pubescent; corolla 1.5–2.3 mm long, dissected to c. 1/2, glabrous; ovary glabrous or finely tomentose towards apex. Pods narrowly oblong to linear, ±flat, straight-sided or slightly constricted between seeds, 4–16 cm long, subwoody, glabrous or with short hairs usually encrusted with resin (possibly becoming glabrescent), with anastomosing ±longitudinal nerves; margins not significantly thickened. Seeds longitudinal to oblique, elliptic to ±rhombic, flat, 8.3–10.5 mm long, with marginal ridge encircling seed; areole open, paler, 0.8–2.2 mm long. 

Occurs in arid regions of Australia, in W.A., N.T., S.A. and Qld. 

J.H.Maiden, Forest Fl. New South Wales 6(10): 272–277, pl. 227 (1917), discussed the confusion surrounding the name A. cyperophylla . See also B.R.Maslin, W. Austral. Naturalist 18: 185–186 (1991). Acacia cyperophylla is related to an undescribed taxon of uncertain rank from the Pilbara region which is noted under A. rhodophloia , and is also related to A. grasbyi which is most readily distinguished by its shorter, nonpungent phyllodes.

There are two varieties.

(Dr M.D.Tindale and Dr P.G.Kodela with the assistance of M.Bedward, S.J.Davies, C.Herscovitch, D.A.Keith and/or D.A.Morrison)

Ultimate branchlets not pendulous; phyllodes ±erect; pods commonly 4–5.5 mm wide (6–9 mm in eastern Australia)

var. cyperophylla

Ultimate branchlets and phyllodes pendulous; pods 7–9 mm wide

var. omearana

 

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