Botanic Gardens Trust, Sydney, Australia

Australian Botanic Garden

Acacia semilunata

The Australian Botanic Garden, Mount Annan - August

Common name Crescent-leaved wattle
Scientific name Acacia semilunata Maiden & Blakely
Family  Fabaceae subfamily Mimosoideae

Genus: Acacia - from Greek acacia, ace or acis, a point or thorn.

Species: semilunata - nearly crescent shaped.

Distribution Confined to the Darling Downs District, Queensland.
Native habitat Grows in eucalypt communities on plains in sand or sandy loam or on low rocky hills.
Description An erect shrub which may reach 2-4 m high by 1-3 m across. This species has reddish coloured branches covered in loose white hairs. The leaves are narrow, glaucous, greyish phyllodes. They are broadly sickle-shaped and up to 3 cm long. The bright yellow ball flowers are borne in racemes in the upper leaf axils and terminally.
Flowering/fruiting Small bright yellow ball-shaped flower heads appear in clusters during July-September. The seed pods mature between September-November and are 5-8 cm long.

Location in Garden

Wattle Garden beds 120, 121, 128, 131.


Acacia semilunata prefers a well drained moderately fertile soil in an open sunny position. This showy plant is both frost and drought tolerant. It is suitable for planting in coastal and inland regions, preferring tropical and sub-tropical zones. Once established it has low water requirements. It responds well to mulch and an occasional deep watering during dry periods, particularly for young plants.

Often this wattle is planted in parks and gardens as a specimen or used along borders for screening. The foliage is attractive all year round. And the long flowering period makes for great winter colour.

This species is similar in general appearance to Acacia cultriformis. However, it is distinguished as having hairy branches, and phyllodes green, rather than the glaucous covering (whitish bloom) on the phyllodes which is very evident on Acacia cultriformis.

A. semilunata

A. semilunata