PI. 212. 
AN ORNAMENTAL TROPICAL YAM, DIOSCOREA SP., S. P. I. No. 38134. 
'The ordinary cinnamon vine (Dioscorea batatas Decsne.) which is related to this species, 
produces such quantities of small aerial tubers resembling miniature potatoes, and these produce 
such persistent vines that they are a veritable nuisance in a border. This large-leaved species, 
however, which produces aerial tubers as large as a good-sized potato, has distinct possibilities as a 
screen vine for porches and may prove valuable treated as an annual much above the frost line. 
Photographed (P19630FS) by P. H. Dorsett at Miami Field Station, June 16, 1916. 
