Acacia tuberculata Maslin, Nuytsia 12: 408 (1999)
Diffuse shrub 0.5–2 m high. Branchlets puberulous. Young branchlets, phyllodes and often the peduncles puncticulate by brown to black, circular, resin papillae. Stipule bases commonly indurate, persisting as blunt tooth-like projections. Phyllodes subsessile, narrowly elliptic to narrowly oblong-elliptic, 1–3 (- 4.5) cm long, 2–5 mm wide, l:w = 4–10, flat or undulate, obtuse to acute, mucronulate, not easily separated from branchlets, dark green, with margins and midribs verruculose by persistent tubercle-bases of hairs, prominently 1-nerved per face; lateral nerves few, obscure; gland 3–6 mm above base, sometimes absent. Inflorescences 2–5-headed racemes; racemes axes 4–7 mm long, sometimes growing out and resulting in single axillary heads; peduncles 6–20 mm long, slender, glabrous to sparsely puberulous, with a semi-persistent bract near or above the middle; heads globular to obloid, 5.5–7 mm long, 4–5.5 mm diam., 30–60-flowered, golden. Flowers 5-merous; sepals mostly free. Pods and seeds not seen.
Known only from within a 50 km radius of Hyden, south-western W.A. Grows on or in association with granite outcrops.
Phyllodes on plants around Hyden are flat or with margins only slightly undulate whereas those at Mt Vernon have strongly undulate margins. These latter collections were made from a regrowth population following fire.
Most closely allied to A. dentifera and A. graniticola which have longer, non-undulate phyllodes and heads in axillary twos or threes or in long racemes with the initiation of the growing-out phase occurring during anthesis.
Type of accepted name
Base of Mt Vernon, W.A., 10 Sept. 1988, B.R.Maslin 6317 ; holo: PERTH; iso: CANB, G, K, MEL, NSW, NY, PERTH.
Representative collection
W.A.: Camel Peaks, due N of Hyden, K.Wallace 1819 (PERTH).
(BRM)
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.
