Inflorescence arrangement

Acacia flowers are aggregated into heads or spikes which are usually borne on peduncles (peduncles rarely absent); the peduncles may arise directly from within the axil of the phyllodes or leaves (Simple) or may be arranged along a long or short, unbranched (Racemose) or branched (Paniculate) common axis.

This Feature is most easily determined when plants are in flower; in fruiting material care should be taken to ensure that the observed structures are correctly interpreted.

Simple. Peduncles arising directly from within the axil of phyllodes or leaves. The number of peduncles per axil can vary from 1 to many. Sometimes inflorescences arise within the axils of juvenile phyllodes on actively elongating new shoots; these structures should not be confused with racemes.

Simple inflorescences are common in Acacia.