Phaseolus debouckii A. Delgado (2017: 260) [clade B; sect. Phaseoli DC emend. Freytag].

TYPE: DG Debouck et al. 2889 (HOLOTYPE: MEXU n.v.; ISOTYPE: P).

This is the interesting case of a species demonstrated to exist as such because of the progress in genomics (Rendón-Anaya et al. 2017a, b), while it was originally collected as “wild P.vulgaris ” (Fig. 7). Found by “accident” (the author was looking for the wild form of the large-seeded Lima bean), this species is distributed on the Pacific slope of the Andes in the Amotape-Huacabamba depression. When the author was consulted about this wild bean, the reply was “ancient and different”, and not less than 29 publications in the period 1992–2017 have precisely demonstrated that. The montane chaparral where it thrives at 1000–2000 m is at risk in many parts according to Michael Dillon (1994).

Specimens: ECUADOR. Chimborazo: JN Rose 23838 (US-1023151). Azuay: DG Debouck 2762 (QCA). PERU. Cajamarca: A Sagasteguí 15887 (HAO-5155).