Indian Snakeweed is a terrestrial, annual or perennial, erect subshrub, up to
2 m tall. Taproot white or brown. Stem quadrangular, solid, glabrous or
hairy. Stipules absent. Leaves simple, not lobed or divided, opposite,
stalked, elliptic or ovate, more than 2 cm long/wide, usually airy on both
sides, margin coarsely dentate, apex acute or obtuse, base obtuse our
rounded, pinnately veined. Stalkless blue flowers appear in a slender
terminal spike, petals 5, blue, with white throat. Fruit is a nut.
This plant is similar to the Blue Porterweed (Stachytarpheta jamaicensis). Whether the two are same, is not clear.
Identification credit: Tabish
Photographed in Imphal, Manipur.
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The flower labeled Indian Snakeweed is ...