Bui. 27, Porto Rico Agr. Expt. Station. 
Plate V. 
Fig. I.— Edible Roots and Air Tubers of Yam (Dioscorea 
SATIVA VAR.), S. P. I. NO. 31922. 
Fig. 2.— Specimen of Yam (Dioscorea chondrocarpa), S. P. I. No. 31920. 
