Acacia chapmanii R.S.Cowan & Maslin, Nuytsia 12: 455–456 (1999)
Dense, intricate shrub 0.5–2 m high. Branchlets glabrous. Stipules persistent, spinose or not, 1–3 mm long. Phyllodes sessile, normally continuous with branchlets but not forming cauline-wings, patent to strongly reflexed or ascending, acicular, straight to shallowly recurved, terete to flat, 2–3 (- 5) cm long, 0.7–1 mm diam., cuspidate-pungent, rigid, green to subglaucous (conspicuously glaucous when young), glabrous, with 8 distant, raised nerves altogether, 3-nerved per face when flat. Inflorescences simple, 1 per axil; peduncles mostly 10–19 mm long, glabrous; basal bracts persistent; heads globular, 4–5 mm diam., 14–27-flowered, golden; bracteoles spathulate, acute or obtuse, exserted or not. Flowers 5-merous; sepals free, spathulate or linear-spathulate. Pods (typical subspecies) strongly curved to openly once coiled, to 4 cm long, 2.5–3 mm wide, glabrous. Seeds (typical subspecies) longitudinal, broadly elliptic, 2.5 mm long, shiny, mottled; aril clavate.
Related most closely to A. campylophylla which has generally shorter, strongly recurved phyllodes and straight, broad pods with transverse seeds. Superficially similar to A. colletioides , A. subsessilis and A. wilsonii .
Occurs as two subspecies in the area just north of Perth, W.A.
Stipules spinose. Phyllodes patent to reflexed, terete, straight
subsp. chapmanii
Stipules not spinose. Phyllodes ascending, subterete to flat, gently recurved
subsp. australis
Acacia chapmanii R.S.Cowan & Maslin subsp. chapmanii
Stipules 1.5–3 mm long, rigid, spinose; gland 0.5–3 mm above phyllode base, commonly absent. Phyllodes patent to reflexed, terete, straight. Heads 14–19-flowered; bracteoles insignificant, the laminae about same width as sepals.
Known only from near Three Springs and near Marchagee, south-western W.A. Grows in sand, laterite and clay loam, sometimes on saline flats, in heath, scrub and disturbed areas.
Type of accepted name
Near Three Springs [precise locality withheld for conservation reasons], W.A., 1 Sept. 1976, B.R.Maslin 4277 ; holo: PERTH; iso: BRI, CANB, K, MEL, NSW, NY.
Representative collections
W.A.: near Three Springs [precise locality withheld for conservation reasons], C.Chapman s.n. (CANB, G, MEL, NSW, PERTH); near Marchagee, B.R.Maslin 5305 (K, PERTH).
Acacia chapmanii subsp. australis R.S.Cowan & Maslin, Nuytsia 12: 457 (1999)
Stipules 1 mm long, not at all rigid, subulate; gland 4–9 mm above phyllode base. Phyllodes ascending, subterete to flat, shallowly recurved. Heads 24–27-flowered; bracteoles evident in buds, the laminae much broader than sepals. Pods and seeds not seen.
Known only from near Bolgart, south-western W.A. Grows in sand and sandy gravel in low heath.
Type of accepted name
Near Bolgart [precise locality withheld for conservation reasons], W.A. 15 Sept. 1972, H.Demarz D3920 ; holo: PERTH; iso: CANB, K.
Representative collection
W.A.: between Bolgart and Calingiri, S.Paust 1005 (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.
