The hybrid’s branching behaviour differs from Acacia
mangium and Acacia auriculiformis in that the tree
has many small, light branches that can be easily
pruned. Similarly, its main stem, though not as
straight as that of Acacia mangium, is much straighter
than the main stem of Acacia auriculiformis. Unlike
the stem of Acacia mangium, that of the Acacia
hybrid has no angles or ribs (Darus and Ghani 1989,
Kijkar 1992). Its phyllode is about 4–6 cm wide and
15–20 cm long, with four veins similar to those of
Acacia mangium, with the vein on the outer edge of
the crescent difficult to see. Flowers come out in July
and August and again in November and December.
Acacia hybrid begins to set flowers at about 3 years.
The flowers are creamy to whitish and arranged in a
straight, or slightly bent, 8–10 cm spike. Since male
flowers in the hybrid are usually situated towards