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Acacia stanleyi

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Acacia stanleyi Maslin (ms)

Stanley's Rock Wattle

Obconic or +/- rounded, bushy shrubs 2–3.5 m tall (growth habit reminiscent of Calycopeplus paucifolius, Euphorbiaceae). Branchlets sub-glabrous when young. Phyllodes continuous with branchlets (and not easily separated from them), terete, 15–30 cm long, 1–1.5 mm diam. sub-rigid, ascending to erect, mostly shallowly incurved, +/- glabrous, green but upon dying turn yellow, then pale orange and finally grey (dead phyllodes remaining attached to branchlets); longitudinal nerves 8, deeply furrowed between nerves; pulvinus absent. Inflorescences simple; spikes 25–35 mm long, golden; peduncles 1–2 mm long, appressed-hairy. Flowers 4-merous; calyx gamosepalous. Pods moniliform to sub-moniliform, (5–) 7–14 (–16.5) cm long, 3–5 mm wide, thinly coriaceous, glabrous. Seeds longitudinal, elliptic to oblong-elliptic, c. 3–4 mm long and 2–2.5 mm wide, black, slightly shiny, minutely rugose and pitted; aril waxy, white to pale brownish cream.

A rare species known from only two populations NE and E of Kalannie, W.A. Occurs on granite outcrops in hard, light brown gritty, sandy loam.

Acacia stanleyi has affinities with both A. jibberdingensis and A. longiphyllodinea . All three species occur in the Kalannie region and are associated with granite rocks; at one site A. stanleyi and A. jibberdingensis are sympatric. Acacia jibberdingensis differs most obviously from A. stanleyi in having (commonly flat) phyllodes with a distinct pulvinus, longer peduncles and larger seeds with only the central area roughened by minute pits. Acacia longiphyllodinea is most readily distinguished from A. stanleyi by its phyllodes having more numerous nerves which are positioned very close together and not separated by well-defined longitudinal grooves; it also has 5-merous flowers, often pruinose branchlets, longer, glabrous peduncles and flat pods with smooth seeds.

Representative collection

W.A.: NE of Kalannie (precise locality withheld for conservation reasons), B.R.Maslin 7501 (PERTH).

(BRM)

This species was not included in the Fl. Australia treatment of Acacia . The above account is based on the treatment presented in: Maslin, B.R. (1998), Wattle of the Kalannie region: their identification, characteristics and utilisation. CDROM Publication. (Department of Conservation and Land Management: Perth.)

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