160 METASPERMAE OF THE MINNESOTA VALLEY. 



DIOSCOREA Linn. Gen. 754 (1737). 



Borderea Miegev. Hull. Soc. Fr. XIII, 374 (1867). 

 Epipetrum Philippi, Linn. XXXIII, 253 (1859). 

 Helmia Kunth, Enum. V, 414 (1850). 

 Hamatris Salisb. Gen. PI. Fragm. 11 (1822?). 

 Botr.vo.sychios HocnsT. Flora (1844). 

 3Ierione and Polyuome Salisb. 1. c. (1822?). 

 Sisiuondea Delpon. Mem. Tur. 2, XIV, .394 (1854). 

 Strophis and Elepliaiitorton Salisb. 1. c. 12 (1822?). 

 Benth. and Hook., Gen. PI. Ill, 743; Durand, Ind. Gen. Phan. 420; 

 Engler and Prantl, Nat. Pdanz. 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 (Lesquei-eaux), a 

 doubtful species. Tertiary, S. France, Bonn, 1-2 {Sajwrta, 

 Weber). 



Dioscorea villdsa Linn. Spec. 1033 (1753). 



D. quinata Walt. F1. Car. 246 (1788). 

 D. pankidata MiCHX. Fl. N. Am. II, 239 (1803). 

 Wats, and Coult., Gray's Man. 517; Britt., Fl. N. J. 238; Upham, Fl. 

 Minn. 143; Chap., Fl. S. St. 474; Mac.,Fl. Can. II, 26; Engl. Pax, Nat. 

 Pflanz. II, 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. PI. 164 (1840); Benth. and Hook., Gen. PI. Ill, 681 

 (1883); Pax in Engler and Prantl, Nat. Pjianz. 2, Y, 137 (1887). 



Genera: 57 living; 1 fossil. 



Sjyecies: 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 (1737). 



Neubeckia Alef. Bot. Zeit. 290, 25)7 (1863). 



Chanioletta Adans. Fam. II, 60 (1763). 



Xyrhlion and louiris Klatt. Bot. Zeit. 497, 513 (1872). 



OiKK-yt-lus SiEMSs. Bot. Zeit. 706 (1846). 



Kvansia, Diaplianc, Tlicly.sia Salisb. Trans. Hort. Soc. I, 

 303-305 (1812). 



Co-stia WiLLK. Bot. Zeit. 131 (1860). 



Coresaiithe Alef. Bot. Z.-it. 298 (186.3). 



HeriiKxlartylon, Xiphioii, Gynaiulriris Parlat. N. Gen. 

 etSpec. Monoc. 34(18390. 



