Dear Sabapathyji
The plant is Hyptis suaveolens (L.) Poit., coming under Lamiaceae.
Originally from America now Pantropical.
--
Prabhu Kumar K MScientist
Plant Systematics & Genetic Resources Division
Centre for Medicinal Plant Research (CMPR)
& 'CMPR' Herbarium
Kottakkal Arya Vaidya Sala
Kottakkal, Malappuram