Phaseolus nelsonii Maréchal, Mascherpa, & Stainier (1978b: 199) [clade A; sect. Minkelersia (Martens & Galeotti) Maréchal, Mascherpa, & Stainier].

TYPE: EW Nelson 1362 (LECTOTYPE: US-764858,as Minkelersia pauciflora Rose (1897:142)) .

Specimens: MEXICO. Oaxaca: M Sousa-Sánchez 8540 (RSA-272960). Chiapas: DE Breedlove 46259 (CAS-651595).