Phaseolus trifidus Freytag (2002: 181) [clade A; sect. Digitati Freytag].

TYPE: FG Meyer & DJ Rogers 2899 (HOLOTYPE: MO-1597351; ISOTYPES: BM, G).

This species only known from the type specimens has been put in synonymy of P.neglectus (Delgado-Salinas et al. 2006), a move that is kept on hold, because the terminal leaflets are differently lobed, and the ratio peduncle/ floral rachis is different as compared to the former (in addition to the different morphology of primary bracts).