Blue snakeweed
Stachytarpheta cayennensis

Verbena is a small weedy perennial herb growing up to no more than 3' high. It has tiny purple flowers along a curled spike and a variable hair grow. Blue porter weed attracts bees and butterflies. Verbena, or gervao, has spasmogenic and vasodilator activity; also anthelmintic and lavacidal properties.