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Acacia hystrix

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Acacia hystrix Maslin, Nuytsia 12: 353–354 (1999)

Rounded or obconic, dense shrub normally 0.3–1 m high. Branchlets glabrous. Stipules normally caducous, inconspicuous. Phyllodes sometimes continuous with branchlet but not forming cauline wings, erect, pentagonal in section, 2–6 cm long, 1–1.7 mm diam., pungent, rigid, glabrous, glaucous to subglaucous between the 5 prominent, yellow or yellow-green, vernicose nerves. Inflorescences simple, 2 per axil; peduncles 5–15 mm long, glabrous; basal bract persistent or caducous; heads globular, 10–13-flowered, bright light golden; bracteoles variably villous with glistening hairs. Flowers 5-merous; sepals free. Pods oblong to narrowly oblong, to 2.5 cm long, 3–5 mm wide, firmly chartaceous to thinly coriaceous, declinate, glabrous. Seeds longitudinal to oblique, oblong-elliptic to oblong-obovate, 2.2–2.7 mm long, somewhat glossy, brown; aril 1/2 to fully length of seed.

Occurs from Kulin E to near L. Gilmore, south-western W.A.

Possibly related to A. tetanophylla which differs by having 7-nerved phyllodes and pods which are not declinate. Two subspecies are recognised.

Phyllodes articulate at junction with branchlet; pulvinus yellowish orange and dilated at base

subsp. hystrix

Phyllodes continuous with branchlet; pulvinus absent

subsp. continua

 

Acacia hystrix Maslin subsp. hystrix

Shrub normally 0.3–0.6 m high. Phyllodes articulate at junction with branchlet, 2–4.5 cm long; pulvinus dilated at base, yellowish orange but often drying light brown. Peduncles 5–10 mm long; basal bract caducous.

Occurs from Kulin E to the Bremer Ra. (c. 165 km due E of Hyden), extending N to near Southern Cross. Grows in a variety of habitats but commonly in sandy loam or clay, in open scrub or open low woodland.

Type of accepted name

1.5 miles [2.4 km] N of Kulin, W.A., 3 Aug. 1970, K.Newbey 3226 ; holo: PERTH; iso: CANB, K, MEL, PERTH.

Representative collections

W.A.: 6.5 km S of Kulin, B.R.Maslin 3425 (AD, BRI, NY, PERTH); Bremer Ra., B.R.Maslin 5427 (BM, CANB, MEL, MO, NSW, PERTH).

 

Acacia hystrix subsp. continua Maslin, Nuytsia 12: 356 (1999)

Shrub to 1 m high. Phyllodes continuous with branchlet, mostly 3–6 cm long; pulvinus absent. Peduncles 7–15 mm long; basal bract persistent.

Known only from the type locality. Grows in clay loam in Eucalyptus woodland with a dense myrtaceous understorey.

Type of accepted name

N of Salmon Gums [precise locality withheld for conservation reasons], W.A., 24 Sept. 1983, B.R.Maslin 5439 ; holo: PERTH; iso: CANB, K.

Representative collection

W.A.: type locality, B.R.Maslin 2462 (CANB, K, MEL, NY, 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