Phaseolus albescens McVaugh ex R. RamÍrez & A. Delgado (1999: 638) [clade B; sect. Phaseoli DC. emend. Freytag].

TYPE: A Delgado-Salinas et al. 1705 (HOLOTYPE: MEXU n.v.; ISOTYPES: GH-423041, K-651820, NY-1104834).

It is a pluriannual vine in montane pine, fir, oak, ash forests on a few mountainous ridges of western Mexico (RamÍrez-Delgadillo & Delgado-Salinas 1999) at 1300–2300 m. Apparently, it was Rogers McVaugh who first realized that this plant was not a P. coccineus nor a P. dumosus (McVaugh 1987, p. 654) . Primary bracts and bracteoles are smaller as compared to those of P.dumosus, corolla pale lavender to old rose contrasting with purple in P.dumosus (Fig. 2), and 4–5 seeds per pod (one less on average in wild P.dumosus). It is possibly at risk because of the logging in these old-growth forests, namely in the area of El Fresnito (county of Zapotiltic in Jalisco) as noted by the author in November 2003.

Specimens: MEXICO. Jalisco: T Kajita 95120310 (MEXU-1235511). Colima: L Rico 926 (IBUG-133696). Michoacán: C Medina G. 3601 (IEB-148134). Guerrero: E Velázquez 479 (K).