Acacia crispula Benth., Linnaea 26: 606 (1855)
Multistemmed, prostrate or low-spreading shrub to 0.3 m high. Branchlets hirsutellous or hirsutellous and pilose intermixed. Stipules persistent, linear, 2–6 mm long. Phyllodes oblique, elliptic or narrowly elliptic to lanceolate, infrequently obovate or narrowly oblong, 1–3 cm long, 2–12 mm wide, undulate, acute to obtuse and apiculate-mucronulate, pilose or hirsutellous or a mixture of both, 1-nerved per face; lateral nerves obscure. Inflorescences simple or in racemes 0.5–3 mm long, 1 or 2 per axil; peduncles usually 1–2.5 cm long, with indumentum as on branchlets; heads globular, 4–4.5 mm diam., 10–20-flowered, pale yellow. Flowers 5-merous; sepals 1/2–3/4-united, the lobes acute, the calyx tube 5-nerved; petals pilose to hirsutellous, 1-nerved. Pods narrowly oblong, straight or arcuate, 1–4 cm long, 5–7 mm wide, crustaceous to coriaceous, glabrous or pubescent as branchlets. Seeds transverse, oblong-elliptic, 3–3.5 mm long, shiny, black, arillate.
Gordon R. near Cranbrook E to near Cape Arid, south-western W.A., with one collection ( R.D.Royce 9805 , PERTH) from near Wagin, c. 140 km N of Cranbrook. Grows in sand, sandy or gravelly clay, sandy loam and loam, mostly in mallee shrubland but also in heath, low scrub and open wandoo flats.
Phyllodes are variable in size: the type of A. crispula (phyllodes 2–2.5 mm wide) and of A. pilosa (phyllodes 6–12 mm wide) encompass the variational limits of phyllode width for the species.
A.S.George 3148 (PERTH), from Bluff Knoll in Stirling Ra., has shorter than normal phyllodes (4–6 mm long). It also has very narrow phyllodes like the type of A. crispula which has short peduncles (6–7 mm long). This suggests that perhaps the type was collected from a peak in the Stirling Ra. The Maxwell specimen from near Cape Arid (at the eastern limit of the range) has unusual phyllodes which resemble some forms of A. crassistipula ; they are lanceolate, elongate (l:w = 6) and have narrowed to recurved apices; in A. crispula the apices are commonly straight. Acacia crassistipula is readily distinguished from most other Acacia species by its foliaceous stipules.
Type of accepted name
South west Australia, J.Drummond 78 ; syn: K (four specimens on sheet), NSW, PERTH.
Acacia pilosa Benth., Linnaea 26: 607 (1855), non Bertero ex DC. (1825). Type: Swan R., W.A., J.Drummond 5: 12 ; syn: K (herb. Bentham and herb. Hooker, 2 sheets); isosyn: BM, CGE, MEL, NSW, OXF, P, PERTH; Swan R., W.A., 1845, J.Drummond supplement no. 35 ; syn: K, MEL.
M.Simmons, Acacias Australia 2: 97 (1988), as A. pilosa .
W.A.: base of Mondurup Peak, Stirling Ra., R.J.Cumming 997 (PERTH, TLF); c. 10 km ESE of Howick Hill, E.N.S.Jackson 1237 (PERTH); Mt Melville near Cape Riche, B.R.Maslin 1057 (AD, BRI, K, MEL, NSW, PERTH); near Cape Arid, 1875 [G.] Maxwell s.n. (PERTH ex MEL); 8 km N of Ravensthorpe in Ravensthorpe Ra., P.G.Wilson 7105 (CANB, PERTH).