Stachytarpheta jamaicensis Is a species of plant in the Verbenaceae family, native throughout the Caribbean. It has many common names including blue porterweed, blue snake weed, bastard vervain, Brazilian tea, Jamaica vervain, and light-blue snakeweed. It is unclear whether S. indica is a separate species. It is usually found along country roadsides and it grows also well as a ruderal plant on disturbed terrain. It is an invasive species in some places.
This plant can be also found on St. Croix, where it is locally known as "worryvine"....LESS