Electronic Flora of South Australia
Electronic Flora of South Australia
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Electronic Flora of South Australia species Fact Sheet

Family: Leguminosae
Acacia trineura

Citation: F. Mueller, Pl. lndig, Colon. Vic. 2:25 (1863).

Derivation: tri (Latin)--three; neuron (Gr.)--nerve.

Synonymy: Not Applicable

Common name: Three-nerved wattle

Dense, bushy, rounded, spreading, fragrant shrubs 2-5 m high or a small tree-like habit with a short trunk; branchlets slightly angular and hoary but becoming terete and glabrous on older stems.

Phyllodes narrowly-obovate, oblanceolate, 4-6 cm long, 4-6 mm broad, flat, straight or curved, 3 prominent longitudinal veins and a few less conspicuous, reticulate lateral veins on each face, apex obtuse with a very short point; glands basal not prominent,

Inflorescences in short axillary racemes, raceme axis hoary with 3-6 heads; flower-heads globular, mid-yellow, c. 25-flowered; peduncles hoary, c. 5 mm long; flowers 5-merous.

Legumes linear, 3-5 cm long, c. 3 mm broad, straight or slightly curved, biconvex, acute at both ends; margins slightly constricted between seeds. Seeds longitudinal in legume, obloid-ellipsoid; funicle short, folded a few times below the seed then expanded into a small oblique aril.

Distribution:  Rare in S.Aust. Appears to be confined to a small area west and south-west of Naracoorte in the South-Eastern region. Soils: shallow dark cracking clays. Rainfall 500-600 mm. Also north-western Vic., not common.

S.Aust.: FR, NL, MU, SL, SE.

Conservation status: Lang & Kraehenbuehl (1987) consider this species to be Endangered.

Flowering time: August — October.

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

Biology: No text

Related taxa: Acacia redolens an endemic to W.Aust. appears closely allied (B R. Maslin, Nuytsia 1(4)327 (1974)).

Cultivation: Very showy when in flower and suitable for ornamental or roadside planting, adaptable to a variety of soils. Fast growth rate.

Author: Not yet available



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