Dear Mohina ji
I agree with the treatments followed in flowersofindia website.
I also strongly believe that J. trinervia and J. betonica are two distinct species: the former is generally a low-lying procumbent herb with narrow leaves, whereas the latter species is a taller, erect herb/subshrub/shrub reaching 2 m high, with ovate-lanceolate leaves. (nevertheless, the bracts are similar-looking: scarious with green nerves in both the species).
Your plant looks like J. betonica to me.
The Plant List follows Tropicos
http://www.tropicos.org/Name/100073?tab=acceptednames which has treated J. trinervia as synonym to J. betonica based on two publications (Russell et al., 1987; Immelmann, 1988). But I think it needs a recheck.
Let's wait for comments...
Vijayasankar Raman
National Center for Natural Products Research
University of Mississippi