East-Himalayan Mucuna is a climbing shrub with young parts grey velvet-hairy Leaves are alternate  trifoliolate  up to 25 cm long  leaflets 65-15 x 5-12 cm  laterals obliquely ovate or triangular  last one ovate-rhomboid  pointed or nearly so  base rounded  flat  hairless or becoming hairless above  adpressed velvet-hairy beneath