Habit: Spermacoce tetraquetra grows as an herbaceous perennial, up to 60 cm in height. Branches and stems quadrangular and vegetation with long, white, pubescence. The leaves are arranged oppositely with bristle like stipules between the petioles. The sub sessile leaves are ovate to lanceolate, up to 8 cm long (typically shorter) and 3 cm wide, with an acute leaf apex and a ciliate margin. Leaves shorter toward the branch apex and the internodes are longer than the leaf length.
The, actinomorphic, perfect, complete, flowers occur in few flowered or solitary terminal heads at the ends of branches and are subtended by shorter leaves. The calyx has 4 fused at the base, glabrous linear – lanceolate lobed sepals. The corolla has 4 fused, pubescent, white, petals that form a short tube and each slightly recurved lobe with an ovate apex. There are 4 stamens that are fused to the perianth forming a hypanthium. The ovary is inferior with 1 locule and many ovules. The fruit is a pubescent capsule at maturity.
Habitat: Spermacoce tetraquetra grows in Human Altered environments (old fields, abanadoned lots, roadsides),
Distribution: Spermacoce tetraquetra is an unlikely native to the Lucayan Archipelago occurring throughout the islands as well as Cuba, Jamaica, Mexico, Central America.
Medicinal/Cultural/Economic usage: Spermacoce tetraquetra not known to be used medicinally in the Bahamas.