160 METASPERMAE OF THE MINNESOTA VALLEY. 
DIOSCOREA Linn. Gen. 754 (1787). 
Borderea Miscey. Skull. Soc. Fr. XIII, 374 (1867). 
Epipetrum Purrrerr, Linn. XX XIII, 253 (1859). 
Helmia Kuntu, Enum. V, 414 (1850). 
Hamatris SAauiss. Gen. Pl. Fragm. 11 (1822?). 
Botryosychios Hocust. Flora (1844). 
Merione and Polynome SALisB. 1. c. (1822?). 
Sismondea DELPON. Mem. Tur. 2, XIV, 394 (1854). 
Strophis and Elephantodon SAtiss. 1. c. 12 (1822?). 
Benth. and Hook., Gen. Pl. III, 748; Durand, Ind. Gen. Phan. 420; 
Engler and Prantl, Nat. Pfanz. 2, V, 132 (Pax); Schenck, Palaeophyt. 365. 
Living species: 150; warmer regions of the earth. 
Principally N. and S. America and S. Africa. U.S., 1. 
Fossil species. Cretaceous, Kansas (Lesquereauz), a 
doubtful species. Tertiary, S. France, Bonn, 1-2 (Saporta, 
Weber). 
Dioscorea villosa Linn. Spec. 1083 (1758). 
D. quinata WALT. F', Car. 246 (1788). 
D. paniculata Micux. Fl. N. Am. II, 289 (1803). 
Wats. and Coult., Gray’s Man. 517; Britt., Fl. N. J. 238; Upham, Fl. 
Minn. 143; Chap., Fl. 8. St. 474; Mac., Fl. Can. II, 26; Engl. Pax, Nat. 
Pflanz. IT, 5, 134; Cov., Fl. Ark. 224. 
North America: Ont. to N. Eng., N. J. and Fla.; W. 
to Minn., Kan., Ark. and Tex 
Minn. valley: Forest district; Ft. Snelling to Mankato; 
infrequent; thickets and edges of woods. 
XX. IRIDACEAE. Iris Family. 
Endlicher, Gen. Pl. 164 (1840); Benth. and Hook., Gen. Pl. III, 681 
(1883); Pax in Engler and Prantl, Nat. Pflanz. 2, V, 187 (1887). 
Genera: 57 living; 1 fossil. 
Species: 800; Mediterranean and African region, and 
all warmer and temperate regions. Center in Cape of Good- 
hope region for Old World, and in Central America for New 
World. 
IRIS Linn. Gen. 29 (1787). 
Neubeckia ALEF. Bot. Zeit. 290, 297 (1863). 
Chamoletta ADANS. Fam. II, 60 (1763). 
Xyridion and Ioniris KuattT, Bot. Zeit. 497, 513 (1872). 
Onocyclus S1Emss. Bot. Zeit. 706 (1846). 
Evansia, Diaphane, Thelysia Sauiss. Trans. Hort. Soc. I, 
803-305 (1812). 
Costia WiLLK. Bot. Zeit. 131 (1860). 
Coresanthe ALEF. Bot. Zeit. 298 (1863). : 
Hermodactylon, Xiphion, Gynandriris PARLAT. N. Gen. 
et Spec. Monoc. 34 (1839?). 
