Phaseolus albiviolaceus Freytag & Debouck (2002: 179) [clade A; sect. Digitati Freytag].

TYPE: DG Debouck et al. 2063 (HOLOTYPE: US-3168863; ISOTYPES: BR, COL-235996, G, K, M, MICH-1179904, UNL n.v., WIS).

This species (Fig. 4) has been considered a synonym of P.neglectus (Delgado-Salinas et al. 2006); in the latter, on the type, the primary bracts are bigger (4–7 vs 2–2.5 mm), and the rachis of inflorescence is much shorter (2–4 vs 5–8 cm) as compared to the peduncle.Pending more material for study, this synonymy is kept on hold.

Specimen: MEXICO. Nuevo León: DG Debouck 2059 (BR, K, US-3168519).