Phaseolus lignosus Britton (1918: 183) [clade B; sect. Paniculati Freytag].

TYPE (LECTOTYPE): Fig. 205 in “Flora of Bermuda”(from C Watlington 3: EPITYPE K-556376 and K-556377; ISOEPITYPES: BRIT, CAS, COL, F, FHO, FI, G, GH, MEXU, MICH, MO, NCU, NY, P; see Debouck 2015) .

Reasons were presented elsewhere (Debouck 2015) for choosing an epitype (and several duplicates from a single gathering), since the original type was an illustration. So, the “ Bermuda bean” was confused with wild P. lunatus as indicated on some labels (Debouck 2019a); the differences on living plants however are striking (Debouck 2015) (Fig. 10). It is not mentioned in the list of “Vascular Plants of the Americas” (Tropicos 2020), although in author’s view it is a valid species of the section Paniculati (also validated by Delgado-Salinas et al. 1999). This species is endemic to the Bermuda archipelago where 29 mature individuals thrive, explaining its status of critically endangered (Copeland et al. 2014).

Specimens: BERMUDA. Long Island: E Manuel 637 (A), C Watlington 3 (K-650154).