144 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



7. Dioscorea capillaris Heinsl. Biol. Centr. Amer. Bot. 3: 354. 1884. 

 Dioscorca hirsuta Miirt. & Gal. Bull. Acad. Briix. 9': 391. 1842. Not D. 



hirsuta Bluine, 1827-28. 

 Guerrero to Veracruz, Tabasco, and Oaxaca ; tyi)e from Mirador, Veracruz. 

 Central America. 



Glabrous or pubescent ; leaves often very large. 



8. Dioscorea laxiflora Schlecht. Linnaea 17: 606. 1843. 

 Dioscorea remotiflora Kuntb, Enum. PI. 5: 409. 1850. 

 Dioscorea sparsiflora Hemsl. Biol. Centr. Amer. Bot. 3: 360. 1884. 



Slnaloa to San Luis PotosI and Oaxaca; type from Atotonilco el Grande, 

 Hidalgo. 



Glabrous or pubescent; leaves often very large; capsules about 2 cm. long. 

 " Bejuco de visnaga," " falsa cocolmeca " (Oaxaca). 



Roots often very large, covered with irregular plates. 



9. Dioscorea dugesii^ Robinson, Proc. Amer. Acad. 29: 330. 1894. 

 Dioscorea riolacea Uline, Bot. Jahrb. Engler 22 : 423. 1896. 

 Guanajuato (type locality) to Oaxaca. 



Plants puberulent. 



10. Dioscorea spiculiflora Hemsl. Biol. Centr. Amer. Bot. 3: 361. pi. 92. 1884. 

 Yucatan (type locality). Guatemala. 



Plants glabrous. 



11. Dioscorea platycolpota Uline; Robinson, Proc. Amer. Acad. 36: 471. 1901. 

 Known only from the type locality, near Iguala, Guerrero. 



Plants glabrous ; leaves orbicular-cordate. 



12. Dioscorea pringlei Robinson, Proc. Amer. Acad. 29: 323. 1894. 

 Jalisco, the type from Guadalajara. 



Plants glabrous. 



13. Dioscorea m^acrostachya Benth. PI. Hartw. 73. 1841. 

 Dioscorea macrophylla Mart. & Gal. Bull. Acad. Brux. 9': 392. 1842. 



' Dioscorea leiboldiatia Kunth, Enum. PI. 5: 355. 1850. 



? Testudinaria cocolmeca Procopp, Bot. Centralbl. 49: 201. 1892. 



Veracniz and probably elsewhei'e; type from Panistlahuaca and Tepinistla- 

 huaca. Central America. 



Plants glabrous ; capsules 2 to 3 cm. long. 



Testudinaria cocolmeca is referred here with doubt by Uline ; it may be 

 referable rather to D. remotiflora, or perhaps it is a distinct species The 

 plant so named is very imperfectly known. 



14. Dioscorea composita Hemsl. Biol. Centr. Amer. Bot. 3: 354. 1884. 

 Veracruz, Oaxaca, and Chiapas ; type from Orizaba, Veracruz. Central 



America. 



Glabrous or nearly so ; capsules about 3 cm. long. 



15. Dioscorea floribunda Mart. & Gal. Bull. Acad. Brux. 9^: 391. 1842. 

 Veracruz, Oaxaca, and Tabasco; type from Jalapa, Veracruz. Central 



America. 



^ Alfredo Duges, a native of France, came to Mexico in 1853. For many years 

 he held the chair of natural history in the college of the State of Guanajuato. 

 He was a diligent student of the plants and animals of Mexico, and published 

 many papers upon natural history. He obtained extensive collections of plants, 

 many of which are in the Gray Herbarium, and a few in the U. S. National 

 Herbarium. He died in 1910. The genus Dugesia, of the family x\.steraceae, 

 was named in his honor by Gray. 



