Vachellia farnesiana, previously known as Acacia farnesiana, commonly known as Needle Bush, is so named because of the numerous thorns distributed along its branches. Other common names included Sweet Mimosa Bush or Prickly Mimosa Bush or Prickly Acacia. It is prickly but not quite as prickly as the introduced species Vachellia (Acacia) nilotica, from the east Kimberley.
This shrub or tree grows up to 2.5 m high and has brown smooth bark with prominent bumps (lenticels). Originally from Central America it was probably introduced to Australia prior to European settlement.
Acacia farnesiana is popular for its fragrant flowers which are distilled in the south of France to make an essential oil called ‘cassie’ which is used as a basis for aromatherapy and perfume.