Stachytarpheta species

Stachytarpheta species;

Stachytarpheta jamaicensis - 190112 - RK - 2: Hope the ID is correct. flowersofindia informs there are 2 other blue stachys that look similar. - S. indica & S. cayennensis.
Pic taken on 08-01-2012 at 9.45am on Bhadravati banks,Lakkavally,Karnataka.
I think Stachytarpheta cayennensis, Verbenaceae.
Probably S. jamaicensis but I can't confirm as the complete plant is not visible in the photos its quite hard to ID a plant just
looking at the flowers.