This shrub has an upright smooth greyish trunk with spreading hairy branches that form an open rounded crown. It has grey-green broad sickle-shape leaves and the small bright yellow ball-shape flower heads appear in clusters during spring.

Hardiness zones 9 to 11 

Acacia semilunata is naturally found in Australia growing in Queensland on the Darling Downs. It prefers a well drained moderately fertile soil in an open sunny position tolerating frost and drought.
 
This wattle tree is grown for its foliage colour and flowers. It is planted in parks and gardens along borders or used as a specimen. It is suitable for inland regions or coastal and establishes in 2-3 years. It is moderately long lived and may self sow under optimum conditions. ID 2575

Acacia (a-KAY-see-a) semilunata (SAY-mee-loo-NAH-tah)

Fabaceae (fab-AY-see-ee)
subfamily Mimosoideae 
Wattles