235 
DIOSCOREACEAE, yam family 
DIOSCOREA, yam 
*+Dioscorea batatas Decne., yam, Chinese yam ge 1982) 
D. quaternata (Walter) J. ear: wild yam, p. 4 
D. villosa L., wild yam 
f. ee rhe Fern. [M: D. villosa] (Ward, 1977) 
villosa 
GRAMINEAE (see POACEAE) 
HYDROCHARITACEAE, frogbit family 
ANACHARIS (see ELODEA) 
ELODEA, elodea, waterweed, bassweed 
[S: ANACHARIS] (St. John, 1962, 1965) 
Elodea ssaateneie Michaux [S: Anachans canadensis (Michaux) 
Planchon] (St. John, 1965), p. 67 
E. nuttallii Grenier) H. St. John [S: Anacharis nuttallit 
Planchon] (St. John, 1965), P- 
LIMNOBIUM, frogbit 
Limnobium spongia (Bosc) Steudel, American frogbit, p- 67 
VALLISNERIA, eelgrass, tapegrass, wild celery 
Vallisneria americana Michaux, American eelgrass, American 
wild celery, p. 67 
var. americana 
: k 
S: Steyermark G: Great Plains Flora M: Mohlenbroc 
