A taxonomic note on the genus Mimosa (Fabaceae) and the potential invasiveness of M. diplotricha in Sri Lanka (Giant sensitive plant)

Mimosa diplotricha, naturally a tropical American species, has now achieved the status of a noxious and invasive weed in the continental Africa and tropical Asia including the neighbouring India. It evidently impacts upon agriculture, pasture, forest ecosystems and wildlife. Although this species had been recorded several decades ago in Sri Lanka, its relatively extensive occurrence, rapid spread and invasive features have been manifested during recent past and therefore necessitate prompt attention of relevant authorities to control this troublesome invader. Furthermore, the recent addition of two more exotic species of Mimosa to the flora of Sri Lanka necessitates the updating of the taxonomy of the genus.