Pogostemon species?- Karjat, Maharashtra

Herb ID request - RK118 - 22-Aug-2013 : Attachments (2). 4 posts by 3 authors.
Requesting id of this small herb seen recently in Karjat.
The leaves are also quite small, maybe around 3 to 4 cms. but they are quite interesting since the under-side of the leaves is pink. Flowers / fruits not seen.
... Begonia ?
any thing like hemigraphis....?
Thanks a lot ... for the possible ids. I hope to see it flowering to be able to identify it properly. 
Perhaps Plectranthus scutellaroides
Thanks, ..., I do not think so as per Plectranthus scutellarioides
Maybe a Pogostemon sp.
Both P. pubescens and P. purpurascens have younger leaves with pink colour on the undersides. Both are found in Karjat area.