Phaseolus xanthotrichus Piper (1926: 698) [clade A; sect. Xanthotricha A. Delgado].

TYPE: ET Heyde & E Lux 4171 (HOLOTYPE: US-247544 n.v.; ISOTYPES: GH-64114, M, US-942184).

While its habitat (lower montane moist forest with alder, oak, pine, cedar, at 1400–2400 m) has been invaded by Coffea arabica mostly over the last two centuries, it has been able to survive under the fences of coffee plantations where herbicide sprays are less frequent.

Specimens: MEXICO. Chiapas: DE Breedlove 53235 (CAS-668979). GUATEMALA. Sacatepéquez: M Véliz 7362 (MEXU-999506). Santa Rosa: DG Debouck 2438 (US-3168340). EL SALVADOR. Ahuachapán: EA Montalvo 4596 (ITIC). Santa Ana: DG Debouck 3229 (LAGU). Sonsonate: EA Montalvo 4926 (ITIC). COSTA RICA. San José: DG Debouck 3176 (CR-247291), DG Debouck 3358 (USJ-111605), B Hammel 23864 (INB-3974385). Cartago: DG Debouck 3125 (USJ-88822).