Additional observations about Phaseolus rotundatus (Fabaceae), an endemic bean species from western Mexico

Abstract

Further information is presented about Phaseolus rotundatus, a new bean species for western Mexico, where it appears to be endemic and endangered, with very few populations reported to date, and all outside current protected areas. The differences between P. rotundatus and P. marechalii (both of Phaseolus section Paniculati Freytag), the closest taxon with which it can be confused, are highlighted to confirm the validity of the former taxon