Citation: G. Bentham, Hook Lond. J. Bot. 1:332 (1842).

Derivation: gunnii--in honour of Ronald Campbell Gunn (1808-1881), pioneer botanist and scientist in Tasmania.

Synonymy: A. vomeriformis A. Cunn. ex Benth., Hook. Lond. J. Bot. 1:332 (1842). , Racosperma gunnii

Common name: Ploughshare wattle

Description:
Small, rigid, diffuse, prickly, sprawling or procumbent shrubs 20-80 cm high; branchlets terete slender pubescent.

Phyllodes broadly to narrowly triangular, 5-13 mm long, rigid, vein prominently raised and situated near the lower straight margin, upper margin humped or sharply angled below the middle, abruptly contracted at the base, tapering towards the apex into a free straight pungent point.

Inflorescences simple and axillary, solitary; flower-heads globular, whitish-yellow, 20-30-flowered; peduncles slender, finely hairy, about as long as phyllodes; flowers 5-merous.

Legumes linear, 2-3 cm long, c. 4 mm broad, flat, coriaceous, dark brown; margins thickened and constricted between the seeds. Seeds longitudinal in legume, almost orbicular; funicle short, filiform, without aril.

Distribution:  In the Southern Lofty region mainly in the Adelaide Hills area. Usually on rocky hillsides and amongst rocky outcrops in open forest, associated with Eucalyptus obliqua and Eucalyptus baxteri. Soils: hard, acidic, yellow-duplex. Rainfall 500-1000 mm. Also Qld, N.S.W., A.C.T., Vic. and Tas. S.Aust.: SL, SE. Conservation status: Lang & Kraehenbuehl (1987) consider this species to be Rare to Vulnerable. Flowering time: May — September.

SA Distribution Map based on current data relating to specimens held in the State Herbarium of South Australia

Biology: No text

Related taxa: Acacia pravifolia is similar as to phyllode shape but differs in having more than 1 veined phyllodes.

Cultivation: An attractive procumbent or sprawling shrub, very useful as an ornamental for rockery planting. Does well in rocky gravel as well as hard, heavy acid soils; suitable as a ground cover assisting in soil retention. Moderate to fast growth rate.

Author: Not yet available

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