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Asystasia gangetica
This plant is a spreading herb or groundcover, reaching 600 mm in height[3][4] or up to 1 m if supported.[5] The stems root easily at the nodes.[3] The leaves are simple[3] and opposite.[5] The fruit is an explosive capsule which starts out green in colour, but dries to brown after opening
Widespread throughout the Old World Tropics, and introduced into tropical Americas[6] and Hawaii, where it has become naturalized.[2] Both subspecies of this plant have been introduced to Australia where A. g. micrantha is on the National Environmental Alert List and must be reported when found.[5] The original range of the subspecies is unclear,[5] but it is likely that A. g. gangetica was limited to Asia, and A. g. micrantha was limited to Africa.[3] [edit]