Torenia species- Sikkim

Sikkim Flower:9 _ ID Request:
I got this flower on way to Khechipedi Lake from Pelling, South Sikkim.
The shot was taken in October,2010.

– I think Torenia cordifolia, quite common in the region

– Torenia asiatica could also be a choice. Pl post some more photos.

– Could it be Torenia bicolor?

Torenia violacea (Azaolo ex Blanco) Pannell, ??