of the Chicago Natural History Museum (herbarium 
accession numbers 981251 and 1119897). The caruncle 
ridges of this species are less distinctly separated than 
those of P. coccineus. 
Concerning the distribution of Phaseolus polyanthus, 
Piper (1926) says only that the type specimen is from near 
Jalapa, Vera Cruz, where it was collected on a railway 
embankment (Greenman, 1907). Piper further notes that 
specimens which may be from wild P. coccineus plants 
have been collected near Puebla, Puebla; Monte Esco- 
bedo, Zacatecas; Saltillo, Coahuila; Tacuba, Mexico; 
San Juan Capistrano, Jalisco; Tumbala, Chiapas; and 
Frajanco Santa Rosa, Guatemala. As yet, there is, un- 
fortunately, not sufficient information concerning affini- 
ties and barriers between putative wild P. coccineus and 
wild possibly interbreeding species, and domesticated P. 
coccineus to draw any conclusions concerning systematic 
relationships. 
Common beans 
Types of Phaseolus vulgaris not generally distinguish- 
able from modern cultivated varieties appear in abun- 
dance beginning with the Mesa de Guaje level, at about 
the same time that intensive agriculture and fired ceramic 
wares were introduced. Bean remains in non-agricultural, 
pre-pottery Ocampo and Guerra cultures are limited in 
number. This situation is similar to that in the South- 
west, where in the Mogollon and Basketmaker—Pueblo 
regions the increase in bean remains is correlated with 
the introduction of pottery (Kaplan, 1956). 
Common beans, appearing for the first time in the 
Ocampo culture, join the already established Cucurbita 
Pepo (Whitaker, et al., 1957). Both of these plants an- 
tedate the appearance of corn. This is the only area in 
which common beans have been shown to occur prior to 
[ 52 | 
