Indigofera species
Appears to be some Alysicarpus ? Munnar Dec2009
For ID 
This is Indigofera sp.
This plant is Indigofera tinctoria Linn. the plant may bear red or purple flowers in them. I got this information from a picture in the book entitled as " Medicinal Plant Resources of South West Bengal" published by Research Wing , Directorate of Forests, Govt. of West Bengal edited by Dr. N.D Paria (Professor of Botany, Dept. of Botany, University of Calcutta) , published in the year 2005.
Does not match with images at Indigofera tinctoria

Images by Arvind Kadus (Inserted by J.M.Garg)
Indigofera sp. ID pl. : 5 posts by 4 authors. Attachments (1)
Indigofera sp. ID Pl.
For me this looks like Indigofera astragalina
..., as far as i know, I. astragalina has broadly oblong, opposite leaflets and terminal, elongated racemes.
But the posted picture shows narrow, alternate leaflets and shorter, axillary racemes.
You may refer Dr.Sanjappa's revision for an unambiguous id.
fabaceae shrub w/ reddish stems ... pls help id AS-19Oct2012-2: Found growing in the wild, outskirts of Chennai
About 18" height, Fruit and flower in early october,
Stems were reddish.
Fruit pod about 10-12 mm long, 1.5 mm across
Flower is coral red, papilionaceous, about 3 or 4 mm length

Based on earlier EFOI post I think this may be Indigofera prostrata ?
Re: [efloraindia:100765] Fwd: Fabaceae-Faboideae (Papilionaceae) Week: Lespedeza sp. from Chakrata Tiger fall area