While studying the species of Zornia J. F. Gmel. (Leguminosae, Papilionoideae, Dalbergieae) from Brazil for taxonomic revision of the genus, eight lectotypifications are proposed: Hedysarum bifolium Vell., Z. diphylla (L.) Pers. var. bernardinensis Chodat & Hassl., Z. diphylla var. elatior Benth., Z. diphylla f. ciliata Chodat & Hassl., Z. myriadena Benth., Z. perforata Vogel, Z. reticulata Sm., and Z. sericea Moric., as well as two neotypifications for Z. brasiliensis Vogel and Z. ovata Vogel. A new combination, Z. vichadana (Killip ex Mohlenbr.) Fort.-Perez & A. M. G. Azevedo is proposed, based upon Z. pardina Mohlenbr. var. vichadana Kilip ex Mohlenbr. Eighteen new synonymizations are also included.