. Bulletin. Agriculture. 24 THE SOURCE OF THE DRUG DIOSCOREA. pubescent beneath, and figures 6 and 7, illustrating rhizomes of D. paniculata and its variety glahrifolia. "When Dioscorea glmica grows at Ioay altitudes its rhizome is less branched and contorted than Avhen it grows in the mountains. In the Aicinity of Washington. D. C, its rhizome is often as unbranched as the rhizome of D. quatemata^ and might be mistaken for that. Fig. 7.—Rhizomes of Dioscorea paniculata var. ijlubrifulia from Gloundale, Prince Georges Co., MfL, collected by H. H. Bartlett. (Two-thirds natural size.) speci
. Bulletin. Agriculture. 24 THE SOURCE OF THE DRUG DIOSCOREA. pubescent beneath, and figures 6 and 7, illustrating rhizomes of D. paniculata and its variety glahrifolia. "When Dioscorea glmica grows at Ioay altitudes its rhizome is less branched and contorted than Avhen it grows in the mountains. In the Aicinity of Washington. D. C, its rhizome is often as unbranched as the rhizome of D. quatemata^ and might be mistaken for that. Fig. 7.—Rhizomes of Dioscorea paniculata var. ijlubrifulia from Gloundale, Prince Georges Co., MfL, collected by H. H. Bartlett. (Two-thirds natural size.) species, but its greater diameter still suffices to distinguish it from D. paniculata. The form of rhizome which occurs most frequently in the drug trade at the present time is well illustrated by figure 8. This particular specimen was obtained through the kindness of Mr. R. W. Proctor, of Cincinnati. Ohio. As a general rule, collectors of Dioscorea who supply the drug market do not distinguish between 189. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Bureau of Plant Industry. Washington : G. P. O.
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