Stachytarpheta Vahl.
Engl.: porterweed.

Stachytarpheta indica:

Stachytarpheta indica Vahl, Verbenaceae: See Stachytarpheta jamaicensis (L.) Vahl.

Stachytarpheta jamaicensis

Stachytarpheta jamaicensis (L.) Vahl.
Engl.: blue porterweed, light-blue snakeweed, Jamaica vervain.
Bot. syn.: Stachytarpheta indica Vahl, Valerianoides jamaicensis (L.) Kuntze, Verbena jamaicensis L.

Stachytarpheta urticifolia

Stachytarpheta urticifolia Sims.
Engl.: blue porterweed, false vervain, nettle-leaf velvetberry.

I have no articles for this botanical term, but there might be some for the next level down (if found).