Acacia uliginosa Maslin, Nuytsia 2: 285; 287, fig. 8 & 326, fig. 20 (1978)
Sprawling or erect shrub, 0.3–0.6 m high. Branchlets sparsely antrorsely puberulous, hairs confined to ribs and commonly appressed. Phyllodes narrowly triangular, sometimes narrowly semi-trullate with a slight gland-angle on adaxial margin near base, pungent, cusp slender and c. 1 mm long, 5–9 mm long, 1–1.5 mm wide, patent, rigid, often distant, glabrous, green, midrib prominent and central, lateral nerves absent; stipules narrowly triangular to setaceous, erect, straight. Inflorescences simple, 1 per axil; peduncles 1–5 mm long, puberulous; heads globular to shortly obloid, 8–15-flowered, pale yellow to cream. Flowers 4-merous; sepals 1/2-united, lobes triangular; petals glabrous, nerveless. Pods curved, terete, to 7 cm long, 2 mm diam., red-brown, striate, glabrous or subglabrous. Seeds longitudinal, oblong, 3–4 mm long; aril terminal, conical.
Occurs in the Witchcliffe-Augusta, Northcliffe-Walpole and Albany areas, south-western W.A. In the Witchcliffe-Augusta area it grows on sand, sandy loam or lateritic loam in shallow depressions in open Jarrah-Marri forest. Elsewhere it grows on loam in clearly defined, seasonal swampy areas.
Habit variable. In swampy sites within dense vegetation it is a sprawling shrub with long, weak, slender branches to 1 m long and as such it resembles A. inops . On drier, more open sites it is an erect shrub to 0.6 m high and with more rigid branches. Intermediate forms occur.
Type of accepted name
Marbellup, c. 15 km W of Albany towards Denmark, W.A., 29 Aug. 1975, B.R.Maslin 3778 ; holo: PERTH; iso: CANB, K, MEL, NSW, NY.
Acacia horridula var. hastulatoides E.Pritz., Bot. Jahrb. Syst . 35: 297 (1904). Type: near Marbellup, W.A., L.Diels 3393 ; n.v.
B.R.Maslin, Nuytsia 2: 287, fig. 8 (1978)
W.A.: near Karridale, on Margaret R.- Augusta road, B.R.Maslin 474 (CANB, NSW, PERTH); 2 km N of Northcliffe towards Manjimup, B.R.Maslin 3785 (AD, BRI, G, K, PERTH, RSA).