Acacia wilsonii R.S.Cowan & Maslin, Nuytsia 12: 449–450 (1999)
Prostrate shrub normally 0.2–0.3 m high. Branchlets at first slightly angled, villous to pubescent with minute black resin-hairs intermixed, soon terete and glabrous except for resin-hairs. Phyllodes continuous on branchlets, ascending to erect, shallowly curved to shallowly sigmoid or sinuous, terete, 6.5–22.5 cm long, 1–1.5 mm diam., with curved-acute and innocuous apex, coriaceous to semirigid, glabrous, with 8 distant, strongly raised nerves. Inflorescences simple, 1 (2) per axil; peduncles 4–10 mm long, to 14 mm long in fruit, villous and with minute resin-hairs intermixed; heads globular, 8 mm diam., 24–37-flowered, golden. Flowers 5-merous; sepals 1/2–3/4-united. Pods linear, not constricted between seeds, slightly curved, subterete, to 5.5 cm long, 3–3.5 mm wide, thinly crustaceous, dotted with minute, black resin-hairs. Seeds longitudinal, oblong, 2–3 mm long, dull brown, tuberculate, the tubercles irregular-shaped; aril apical, yellow.
Restricted from near Eneabba S to Badgingarra, south-western W.A. Grows in sand or sandy lateritic gravel in heath.
Relationships not clear but perhaps has some affinities with A. ridleyana ; both species have free sepals and variably united petals, linear, acuminate bracteoles and linear, terete or subterete pods. However, A. ridleyana has pulvinate, flat, much shorter phyllodes with clear articulation between pulvinus and branchlet. Phyllodes that are epulvinate and continuous on the branchlets are not common in section Plurinerves. Both A. campylophylla and A. chapmanii , in this section, have such phyllodes, but they are much shorter than those of A. wilsonii and furthermore, their petals and sepals are free and they have very different pods.
Type of accepted name
10 km N of Badgingarra, W.A., 2 Nov. 1965, P.G.Wilson 3850 ; holo: PERTH; iso: K, PERTH.
Representative collections
W.A.: c. 12 km E of Eneabba, E.A.Griffin 8143 (PERTH); E of Eneabba, M.Simmons 510 (PERTH).
(RSC)
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.
