corn and the early bean types persist into more recent 
archaeological times. 
The presence of these bean types in early pre-pottery 
times followed by an expansion of their use with the in- 
troduction of pottery agrees with the hypothesis pre- 
sented (Kaplan, 1956) to account for the remarkable 
constancy of bean types over long time spans in the 
Southwest. This hypothesis postulates that beans en- 
tered as domesticates very early, were sparingly culti- 
vated until the use of pottery began and then the same, 
long established, well adapted varieties came into more 
general use. 
Collections of specimens determined as wild P. vul- 
garis have been made by G. F. Freytag, O. W. Norvell, 
A. Burkart and others. The only published account of 
wild and cultivar affinities which goes beyond morpho- 
logical comparison is that of Burkart and Briicher (1953). 
A wild Phaseolus species collected in Central and South 
America, and studied by these authors, has proven to 
interbreed with P. vulgaris and although the floral mor- 
phology is similar, differences in seeds, pods and leaves 
exist. Asa result of their studies, revisions in the no- 
menclature of P. vulgaris L. were proposed by Burkart 
and Briicher (1953). 
The various collections identified as wild P. vulgaris 
have all been vining types with seeds smaller than those 
encountered in most cultivated varieties. It seems that 
the determinate growth habit as well as increase in seed 
size and reduction of pod-shattering have been estab- 
lished under domestication. 
Sieva beans 
Small seeded limas, or sieva beans, were introduced 
late and never attained much importance. Their paucity 
here substantiates other evidence indicating that these 
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