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Acacia minyura

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Acacia minyura Randell, J. Adelaide Bot. Gard . 14: 126 (1992)

Usually multistemmed shrub to 4 m tall and wide. Branchlets with massive resinous ribs; blue-grey resin coating growing points and young phyllodes. Phyllodes flat, straight or slightly sigmoidly curved, 5–25 (–30) mm long, 2.2–4 mm wide, mucronulate, with prominent nerves. Inflorescences single in axils; peduncles 4–12 mm long; spikes 10–15 mm long. Flowers 5-merous; sepals 0.5–0.8 mm long, free; corolla 1.4–1.5 mm long, glabrous; stamens 2.5–3 mm long; ovary with minute appressed scale-like hairs. Pods shortly stipitate, oblong, flat, oblong; to 3.5 cm long, 11–15 mm wide, including wings 1–2 mm wide, chartaceous, brown, reticulately nerved, glabrate, dehiscent. Seeds obliquely transverse, oblong, 4–5 mm long, 2–2.5 mm wide; aril small, terminal, oblique, pileate, creamy .

Ranging from the western fringe of the Gibson and Great Victoria Deserts, W.A. through southern N.T. and central S.A. to Bilgunnia Stn, with three widely separated outliers in central-western Qld; usually on sandy soils particularly in dune swales and occasionally on shallow rocky soils.

Intergrades with A. ayersiana and A. aneura over much of its range, particularly in the southern part of the N.T. Intergrades usually have narrower phyllodes with a greater length/width ratio than those of A. minyura . Intergrades with A. aneura usually have copious red-brown resin on the branchlets and those with A. ayersiana have blue-grey resin sometimes only on the new growth and sometimes also on developed phyllodes which often have prominent marginal nerves. A well-marked variant occurs in shallow stony soils on hillsides and mesas in the south of the N.T. It is a single or multistemmed shrub with often reddish resin on the branchlets, phyllodes that are broadly obovate or orbicular, 5–25 (–30) mm long, 5.5–10 mm wide, 2–4.5 times longer than wide, and smaller flowers. A representative collection is New Crown Stn, N.T., P . K . Latz 6873 (NT). As noted by B.R.Randell ( J. Adelaide Bot. Gard . 14: 127, 1992), a Winnecke collection mentioned by Mueller in the protologue of A. craspedocarpa is A. minyura. It belongs to this variant with wide phyllodes.

Type of accepted name

24 km E of Ayers Rock, N.T., 30 Sept. 1979, J.R.Maconochie 2539 ; holo: PERTH; iso: BRI, DNA.

Representative collections

W.A.: Laverton District, 14 May 1965, per R.J.Donovan (PERTH); N of Rawlinson Ranges, A . C . Kalotas 1621 (DNA, NT, PERTH). N.T.: 1.6 miles [2 km] NW of 16 Mile Bore, D.J.Nelson 1599 (NT); old Ayers Rock road, 36.6 km E of Ranger’s Station, M.Lazarides & J.Palmer 225 (BRI, CANB). S.A.: Bulgunnia Stn, 1.7 km SW of homestead, F.Badman 6536 (AD). Qld: near Noonbah Stn, Vegemont Ck, R.Dowling WP292 (BRI).

(LP)

 

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