Phaseolus acutifolius var. tenuifolius A. Gray Phaseolus acutifolius var. tenuifolius A. Gray in Smithsonian Contr. Knowl. 5(6): 33. 1853 sec. Maréchal & al. 1978=Phaseolus montanus Brandegee in Proc. Calif. Acad. Sci., ser. 2, 3: 130. 1891 syn. sec. Freytag & Debouck 2002