Jamaican Vervain
Blue Porterweed
Stachytarpheta jamaicensis
Photographed at the forest boundary, Kakamega, western Kenya, East Africa. Dec. 2015.
LEAVES: Dark green leaves have prominent veins and coarsely serrated leaf margins.
Opposite leaves.
SUBSHRUB: Mostly herbaceous growth from woody bases; plants mostly less than 1½ m.
FLOWERS: Blue flowers appear in a tall, narrow spike. There are five fused petals.
RANGE: This is an introduced plant and is sometimes weedy or invasive.
Native to the Caribbean.
FRUIT:
UNARMED.