Citation: J. H. Maiden, J. Proc. R. Soc. N.S.W. 53:182 (1920).

Derivation: havilandii—named in honour of Edwin Haviland (1823-1908) and his son, Archdeacon Francis Ernest Haviland (1859-1945).

Synonymy: Not Applicable

Common name: needle wattle, Haviland's wattle

Description:
Bushy, rounded, glabrous shrubs 2-3 m high, occasionally tree-like with a short trunk to 4 m high; branches grey to reddish-brown, ascending, smooth, almost terete; bark thin, greyish-brown.

Phyllodes terete, 4-8 cm long, 0.8-1 mm diam., straight or slightly curved, ascending, always very brittle and snapping easily and cleanly, finely striate with numerous rather obscure longitudinal veins, apex acute but barely pungent; glands small, near the centre of the phyllodes and usually slightly bent at this point.

Inflorescences simple and axillary mostly twin, occasionally ternate; flower-heads bright yellow, 20-30-flowered; peduncles glabrous, 5-8 mm long; flowers 5-merous.

Legumes linear, 5-7 cm long, 2-2 1/2 mm broad, straight or slightly curved not twisted, margins contracted between seeds. Seeds longitudinal in legume, obloid; funicle filiform with 2-3 folds and thickening into a conical aril.

Distribution:  Mainly Flinders Ranges region in tall or low shrubland, on rocky hillsides and gullies, also a few scattered occurrences on Eyre Peninsula region (Gawler Ranges). An isolated occurrence is recorded from Southern Eyre Peninsula near Ungarra. Soils; shallow calcareous loam. Rainfall 200-400 mm. Also N.S.W. and Vic. Conservation status: Lang & Kraehenbuehl (1987) consider this species to be Rare on Eyre Peninsula but not otherwise to be of conservation significance. Flowering time: May, August — November.

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

Biology: No text

Related taxa: Acacia rigens (sp. 82) has tough phyllodes, not snapping easily and veins yellowish and obvious.

Taxonomic notes: A. havilandii is illustrated in colour in Holliday (1976).

Cultivation: A useful small shrub for inland planting, moderate to fast growth rate.

Author: Not yet available

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