sensitive plant, sensitive briar, catclaw mimosa (M. pigra)
Could be confused with
tropical and subtropical America
Mimosa pigra L. (giant sensitive plant) is introduced into northern Australia.
Mimosa pigra is a serious weed in Southeast Asia and is considered one of the worst weeds in Australia. It is also a weed on the U.S. federal noxious weed list.
creeping or erect herb or shrub
Perennial. Stem creeping or erect, highly branching, spinose. Leaves bipinnate, with 6-16 pairs of leaflets, sensitive to touch (will fold up); petioles and leaves also spinose. Inflorescence axillary. Flowers in globose heads, pink to purple. Seeds produced in distinctive hairy pods that break into individual one-seeded segments (in M. pigra). Dispersal by vegetative fragmentation or of seed pods and pod segments by water or animals.
Mimosa is a large genus of over 400 species, with only a few semi aquatic species. Mimosa pigra, although sensitive, is not nearly as sensitive as M. pudica L.