Phaseolus hintonii A. Delgado (2000: 431) [clade A; sect. Xanthotricha A. Delgado].

TYPE: GB Hinton 6728 (HOLOTYPE: K-118675; ISOTYPES: GH, POM-348563) .

A climbing vine resembling P.xanthotrichus from an almost cylindrical pluriannual tuberous root, differing in subcylindrical pods with more than ten seeds, thriving in oak woodlands of central western Mexico at 1200– 1900 m.

Specimens: MEXICO. Jalisco: EA Suárez-Muro 628 (IBUG-197086). México: A Delgado-Salinas 1567 (IBUG-198458). Michoacán: JC Soto-Núñez 4554 (IBUG-198014). Oaxaca: A Delgado-Salinas 1346 (IBUG-197386).