This small tree has a short smooth brown trunk with spreading branches that form a dense rounded crown. It has silvery leaves that are covered in white hairs when young and the fragrant golden yellow flowers appear in a raceme during early winter.

Hardiness zones 9 to 11

Acacia podalyriifolia is naturally found in Australia growing along coastal watercourses from Brisbane to Rockhampton in Queensland. 

It prefers a poor to moderately fertile sandy well-drained soil and grows in a open sunny position and is frost tender when young but drought and salt spray tolerant.

The Queensland Silver Wattle is grown for its flowers and its rounded crown. It is planted in parks and gardens along shrub borders for screening or  trained to form a small shade tree. It establishes in 1 to 2 years growing quickly but is short lived from 7 to 15 years. The foliage is used in floral arrangements and the tree attracts birds and insects. ID 140
 
Note:
This tree self sow's easily and has become a weed in many regions.
 
Acacia (a-KAY-see-a) podalyriifolia (põd-a-li-ree-I-FO-lle-a)

'Acacia': from Greek akazo - to sharpen (some species have sharp thorns); 'podalyriifolia': leaves like Podalyria.

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