259] FIJDRA OF COLUMBIA AND VICINITY II 7 



Tops of cliffs, Sterile hills and red clay barrens. 

 Maine to Assiniboia; Florida to Texas. 



Family 19. DIOSCOREACEAE Lindl. Yam family. 



96. DIOSOOREA L. Yam. 



265. D. villosa L. Wild yam-root. 



In thickets, twining about bushes and fences. 

 Rhode Island to Minnesota; Florida to Texas. 



Family 20. IRIDACEAE Lindl. Iris family. 



97. IRIS L. Fleur-de-lis. 



266. I. pumila L. Dwarf iris. 



Fields west of Columbia, where it appears to be thorough- 

 ly established. 

 Southern Europe: widely cultivated. 



267. I. Virginica L. [7. versicolor L.]. Blue flag. 

 Swamps and swales; scarce and local. 

 Newfoundland to Manitoba; Florida to Arkansas. 



268. I. foliosa Mack. & Bush. Leafy blue flag. 

 Frequent in the swamp south of Hinkson creek. 

 Illinois and Kentucky to Missouri and Kansas. 



268a. I. foliosa Boonensis Daniels. Nov. var. Leafy 

 white flag. 



Flowers varying in color from pure white to delicate 

 cream, otherwise as in the type; common in the southern 

 portion of the swamp mentioned above. 



Boone County, Missouri. 



98. BELAMOANDA Adans. {GEMMxNGIA 

 Fabr.]. 



269. B. Ohinensis (L.) DC. [6^. Chinensis (L.) Kuntze]. 

 Blackberry lily. 



On hills and along roadsides; locally common. 

 Asia, thence to the eastern United States. 



