The stile and stigma are terminal. Ovary is superior, the floral whorls being inserted below the ovary. The carpel or female unit of the flower is solitary, the placenta marginal and the ovules usually numerous attached to the upper suture of the fruit. Pollen grains are often united into small packets. It is dehiscent, ie.
Seeds have a leathery testa or coating.
The endosperm, or nutritive material within the seed, is generally absent or sparsely developed. The embryo has two large flat cotyledons with a usually superior or ventrally placed radical, the organ which gives rise to the primary root system. Other Features Timber varies between the species but some are useful for building, furniture material and specialised use. Use is now being made of the seeds of some species in preparing 'bush tucker'. Aborigines used many parts of acacias for food.