SYNOPSIS OF THE SPECIES OP DIOSCOREA. 13 



North Carolina. — Guilford County, Biltmore Herb., 364 a ; Orange County, 

 W. W. Ashe; Swain County, H. C. Beardslee and G. A. Kofoid, July 25, 1S91. 



South Carolina. — Oconee County, H. D. House, 3470 and 2120 ; Pickens 

 County, //. D. House, 3079. 



Georgia.— De Kalb County, H. Eggcrt, May 22, 1897, and W. W. Ashe, May, 

 1896; Floyd County, Chapman Herb.; McDuffie County, H. H. Bartlett, 1722 

 and 1733 ; Walker County, Percy Wilson, 197 ; Meriwether County, S. M. Tracy, 

 9208. 



Alabama. — Bibb County, E. A. Smith, July 20, 1879 ; Cullman County. //. 

 Eggert, June 21, 1897, and C. P. Baker, May 18, 1897 ; Hale County, S. Watson, 

 in 1857 ; Lee County, F. S. Earle and C. F Baker, April 24, May 8, and October 

 2, 1897 ; Montgomery County, C. Mohr; Tuscaloosa County, E. A. Smith, 1287 

 and 1516 ; Wilcox County, 8. B. Buckley, May, 1839. 



Florida. — Franklin County, Chapman. 



Louisiana. — East Baton Eouge Parish, W. R. Dodson. 



Mississippi. — Choctaw County (?), /. M. Cliite, 68; Jones County, 8. M. Tracy, 

 3355 ; Smith County, S. M Tracy, August 22, 1903. 



Arkansas. — Garland County, William Trelease, October 3, 1898, and 8. E. 

 Meek, August 19, 1889 ; Independence County, F. V. Coville, ISO ; Pulaski 

 County, H. E. Hasse, April 11, 1886. 



Missouri. — Jefferson County, H. Eggert, July 15, 1892. 



Tennessee. — Franklin County, A. Gattinger; Hamilton County, F. Lamson- 

 Scribner, May 21, 1890; Haywood County, S. M. Bain, June 13, 1893; Knox 

 County, A. Ruth, 779 and 1200 a ; Monroe County, F. Lamson-Scribner, June 29, 

 1890. 



Kentucky. — ^Lyon County, IF. W. Eggleston, 4674. 



2. Dioscorea glauca Mulil. Rhizomes 1 cm. or more in diameter, 

 often forked and with many short lateral branches equal in diameter 

 to the rhizome, usually much contorted and forming dense masses. 

 Stems 1 to 3 m. long, rigid and erect below the first node, requir- 

 ing support above. Lower leaves verticillate in whorls of 5 to 7; 

 upper leaves alternate. Petioles densely pubescent at the apex. 

 Leaves larger than in D. quaternata.^ less markedly repand or not at 

 all so, usually sparsely hirtellous beneath, but often glabrous, always 

 glaucous when mature. Paniculately branched staminate inflores- 

 cences solitary, occurring in all the leaf axils. Pistillate inflores- 

 cences few flowered ; fruits 2 to 3 cm. long. 



Dioscorea glauca is essentially a plant of the mountains, although 

 in the northern part of its range it is found near sea level. In the 

 lowlands southward it is replaced by the closely related D. quater- 

 nata. As will be seen from the map (fig. 2) the ranges of the two 

 species hardly overlap. 



The following specimens have been examined: 



Pennsylvania. — Allegheny County, J. .4. Shafer, 590, and C. C. Mellor, June 

 7, 1889 ; Fulton County, Witmer Stone, June 4, 1905 ; Huntingdon County, O. E. 

 Jennings, May 17, 1904 ; Lancaster County, J. J. Carter, May, 1870, and A. A. 

 Heller, June 5. 1900; Susquehanna County, A. Stengel, May 29, 1886; West- 

 moreland County. O. E. Jennings, May 19, 1904 ; York County, J. N. Rose and 

 J. H. Painter, 8123. 

 189 



