images are not very clear. Please check it as Lobelia sp. (Campanulaceae) / Veronica sp. (Plantaginaceae)

When and where was the species recorded?

This images are taken Andaman Islands..

You can be confident that it is a lobelioid Campanulaceae, quite likely a member of Lobelia itself. That particular corolla shape and colour pattern is frequently matched in Lobelioideae. Besides, the inferior ovary precludes Scrophulariaceae.

Could be Lobelia, but the pictures are not clear. Check the stamens which is very characteristic for Lobelia

Thank you Nair sir....Flower: petals fused thats way images not cleared....It is lobelia confirm species..

Then it might be Lobelia alsnoides

I agree with Dr. Narayanan Nair Mohanan. It is Lobelia alsinoides Lam. of Campanulaceae family. It is found at damp places in Southern and Northeastern states of India.

Yes it is Lobelia alsinoidis....Correct Id Dr. Narayanan Nair Mohanan.

Then it Lobelia alsinoides