Acacia cylindrica R.S.Cowan & Maslin, Nuytsia 10: 31 (1995)
Spreading shrub 1.5- 3 m high. Branchlets apically resin-ribbed, sericeous between the glabrous, resinous ribs. Phyllodes erect, straight, terete or quadrangular-terete, 8- 13 cm long, 1- 1.2 mm diam., coarsely pungent, rather rigid, minutely sericeous in the shallow longitudinal grooves between nerves, 16-nerved although sometimes only 8 readily visible, the nerves closely parallel, slightly raised, subequally prominent, the widest (c. 0.2 mm) on the four slight angles. Inflorescences simple, 1 or 2 per axil; peduncles 0.5- 1.5 mm long, densely sericeous; spikes 10- 11 mm long, 5 mm diam., densely flowered, golden. Flowers 4-merous; sepals 1/2- 3/4-united, sparsely puberulous. Pods linear, flat, slightly raised over and slightly constricted between seeds, straight, to 6.5 cm long, 2- 2.5 mm wide, chartaceous, sparsely and appressed-puberulous. Seeds longitudinal, oblong-elliptic, 3.5- 4 mm long, shiny, pale brown; funicle/aril a series of loose loops.
Most collections have been made between Southern Cross and Bullfinch (c. 35 km NW of Southern Cross), but also found NW as far as Kulja (c. 45 km NNW of Koorda), N to Mt Correll (c. 50 km N of Bullfinch) and Bungalbin Hill (c. 50 km N of Koolyanobbing), south-western W.A. Grows in deep yellow sand or gravelly, well-drained sand, on flat to gently undulating plains or on the sides of low hills, in open shrubland.
Erroneously reported by R.S.Cowan & B.R.Maslin, Nuytsia 10: 29 (1995), as having 5-merous flowers and as a consequence referred to the ‘ A. heteroneura group’; however, its closest affinities appear to be with A. filifolia and its allies. Superficially resembling A. desertorum which is distinguished by its globular to obloid, subdensely flowered heads, longer peduncles, narrower, quadrangular pods and mottled seeds. There is a superficial resemblance also to A. sibina which is most easily distinguished by its branchlets that are glabrous except within phyllode axils, its perfectly terete, sharply pungent phyllodes with more numerous nerves and its wider pods which are clearly constricted between the bicoloured seeds. Also similar to A. isoneura subsp. nimia .
Type of accepted name
23 km NE of Bungalbin Hill, c. 68 km NNE of Koolyanobbing, W.A., 8 Sept. 1984, K.Newbey 10826 ; holo: PERTH; iso: CANB.
W.A.: 10.5 km N of Southern Cross towards Bullfinch, B.R.Maslin 2384 (CANB, K, MEL, NSW, PERTH); 6.4 E of Kulja, 17 Dec. 1971, B.H.Smith (PERTH).
(RSC & BRM)