. Yam culture in Porto Rico . Fig. I.—Edible Roots and Air Tubers of Yam (Dioscorea SATIVA VAR.), S. P. I. NO. Fig. 2.—Specimen of Yam (Dioscorea chondrocarpa), S. P. I. No. 31920. Bui. 27, Porto Rico Agr. Expt. Station. Plate VI

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Keywords: ., bookcentury1900, bookdecade1920, bookidyamcult00uni, bookyear1921