Stachytarpheta jamaicensis
Porterweed

Family: Verbenaceae

Form: Evergreen sprawling semi-woody shrub, reaching 4 to 5 ft.

Leaves: Simple, opposite, serrate, glabrous

Stem/Bark: Green turning semi-woody with age

Flower: Purple, borne on spikes

Fruit: Schizocarp

Comments: Often confused with non-native Stachytarpheta urticifolia, but distinguished by scariously margins mostly above the middle of the floral bract, rather than below the middle.