Yes Vijayasankarji, this should be Indigofera. But the species is feel to me like *Indigofera trita *var. *scabra.*
-- *Prabhu Kumar K M* Scientist Plant Systematics & Genetic Resources Division Centre for Medicinal Plant Research (CMPR) & 'CMPR' Herbarium Kottakkal Arya Vaidya Sala Kottakkal, Malappuram *E-mail: prabhumkris...@gmail.com*