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Acacia sedifolia

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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

subsp. sedifolia

Pulvinus present, phyllodes seated on raised stem-projections

subsp. pulvinata

 

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.

Illustration

J.H.Maiden & W.F.Blakely, loc. cit .

Representative collections

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.

Representative collections

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).

(BRM)

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