Zornia grandiflora Fort.-Perez & A. M. G. Azevedo (Leguminosae, Papilionoideae), a new species from Bahia and Pernambuco states in northeastern Brazil, is described and illustrated. The new species is assigned to section Anisophylla Mohlenbr. of subgenus Zornia J. F. Gmel. Zornia grandiflora is similar to Z. sericea Moric., sharing erect stems and ovate to elliptic bracteoles. It can be distinguished from Z. sericea and from other species within Zornia sect. Anisophylla by the large standard (13–17 mm long).