Acacia sedifolia Maiden & Blakely, J. Roy. Soc. W. Australia 13: 3; pl. 1, figs 13–18 (1928)
Resinous, glabrous, dense, rounded shrub to c. 1.5 m high and c. 3 m diam. Branchlets aromatic when crushed. Phyllodes crowded, sometimes on raised stem-projections, ascending to erect, oblong to asymmetrically cuneate, recurved at least at apex, terete to flat, 2–5 mm long, 0.5–1.5 mm wide, l:w = 2–5, obliquely narrowed to a distinct, acute point, thick, green, nerveless, medially sulcate when dry; pulvinus present or absent. Inflorescences simple, 1-headed in upper axils; peduncles 1–7 mm long, somewhat stout; heads globular, 20–26-flowered, light golden to mid-golden. Flowers 5-merous; sepals united. Pods linear, flat, to 5 cm long, 4.5–5.5 mm wide, crustaceous to coriaceous, openly reticulate. Seeds longitudinal, oblong to elliptic, 3.5–5 mm long, brown-black mottled yellow; aril thick.
Perhaps related to A. handonis (Qld) which is readily distinguished by its longer phyllodes.
Occurs from Muntadgin S to Newdegate and Lake King- Mt Gibbs, south-western W.A.
Two subspecies are recognised.
Pulvinus absent, raised stem-projections absent
Pulvinus present, phyllodes seated on raised stem-projections
Acacia sedifolia Maiden & Blakely subsp. sedifolia
Phyllodes not on raised stem-projections, sessile, 1.5–2.5 mm long, usually 0.5–1 mm wide and terete to subterete. Peduncles usually 1–4 mm long. Seeds 3.5–4 mm long.
Occurs from Muntadgin S to Bendering and Hyden, W.A. Grows in lateritic sand or loam, in closed heath or open scrub.
Plants from N of Hyden are characterised by flat phyllodes 1–2 mm wide and peduncles 5–10 mm long. These are perhaps worthy of separate infraspecific rank.
Type of accepted name
Bendering, W.A., 26 Aug. 1923, C.A.Gardner 2006 ; holo: NSW; iso: K, PERTH.
J.H.Maiden & W.F.Blakely, loc. cit .
W.A.: Bendering Reserve, G.J.Keighery 7023 (PERTH); Kittler’s property, 35 km due NE of Corrigin, B.R.Maslin 5759 (BRI, CANB, G, K, MEL, NY, PERTH); near Muntadgin, K.Newbey s.n. (PERTH 00125040).
Acacia sedifolia subsp. pulvinata Maslin, Nuytsia 12: 398 (1999)
Phyllodes on raised stem-projections, 2–5 mm long, 0.8–1.5 mm wide, flat but thick; pulvinus 0.3–0.5 mm long. Peduncles 4–7 mm long. Seeds 4.5–5 mm long.
Occurs from Karlgarin (c. 40 km due E of Kondinin) S to near Newdegate (c. 50 km due E of Lake Grace), also c. 65 km due E of Newdegate between Lake King- Mt Gibbs (Mt Gibbs is c. 35 km due NE of Lake King), W.A. Grows on lateritic hilltops or ridges with sand or clay, in open shrub mallee.
Type of accepted name
5 miles [8 km] S of Mt Gibbs, W.A., 31 July 1969, A.S.George 9457; holo: PERTH; iso: CANB, K, PERTH.
W.A.: 3 km E by road of former Pederah Siding, B.R.Maslin 5775 (BRI, CANB, K, MEL, NSW, PERTH); 11 km E of Lake King, K.Newbey 9482-1 (MELB, PERTH).