Phaseolus costaricensis Freytag & Debouck (1996: 157) [clade B; sect. Phaseoli DC emend. Freytag]. TYPE: DG Debouck et al.2135 (HOLOTYPE: US-3168869; ISOTYPES: BR, CR-125599, K, UC-1571112, USJ-30270).

This taxon was confused with P. coccineus in previous floras of Costa Rica and Panama (Standley 1937 and Lackey & D’Arcy 1980, respectively), although several collectors noted the “bright crimson” or “brilliant fuschia” color of the corolla (Fig. 2). It thrives in alder or oak humid montane forest at 1400–2200 m. Some populations seem already extinct because of the expansion of urban areas and coffee plantations: the one at Ochomogo found in 1896 by A Tonduz 10914 (US-472031) or the one of San Isidro de Coronado found in 1937 by PH Allen 555 (F-920349). Urbanization and the raising of vegetable crops of temperate climate also affect some populations in the ChiriquÍ province of Panama (Debouck & RodrÍguez-Quiel 2020).

Specimens: COSTA RICA. Alajuela: N Chaves-Barrantes 11 (CR-296552). San José: JF Morales 10156 (K). Cartago: DG Debouck 3365 (USJ-111614). PANAMA. Chiriquí: DG Debouck 3372 (UCH).