Diagnostic Opal Phytoliths from Pods of Selected Varieties of Common Beans (Phaseolus vulgaris)

Abstract

Numerous distinctly hooked silicified hairs are produced in pods of common beans (Phaseolus vulgaris). Similar phytoliths were found in six dicot species native to the central Great Plains in an extensive reference collection of both cultivated and wild plants. Statistical analysis demonstrates that many of the hooked hairs produced in common beans are significantly wider near the tip than those produced in the other species. Bean phytoliths were identified at a late prehistoric village in central Kansas based on this distinguishing characteristic.