Acacia farnesiana seeds mature in Oct.Vachellia farnesiana, also known as Acacia farnesiana, and previously Mimosa farnesiana, commonly known as needle bush, is so named because of the numerous thorns distributed along its branches. The native range of V. farnesiana is uncertain. While the point of origin is Mexico and Central America, the species has a pantropical distribution incorporating northern Australia and southern Asia. It remains unclear whether the extra-American distribution is primarily natural or anthropogenic.