96 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Chihuahua and Sonora, on mesas and stony hills ; type from near the city of 

 Chihuahua. Southern Arizona. 



Leaves 3 to 4 mm. wide, sometimes with smooth margins. " Palmilla " 

 (Chihuahua). 



Leaves used in Chihualma for making hats. The young leaves are eaten by 

 goats. 



6. Nolina erumpens (Torr.) S. Wats. Proc. Amer. Acad. 14: 248. 1879. 

 Dasylirion erumpens Torr. U. S. & Mex. Bound. Bot. 216. 1859. 

 Chihuahua. Western Texas (type locality). 



Leaves usually 6 to 10 mm. wide, with rough or rarely smooth edges. 



7. Nolina cespitifera Trel. Proc. Amer. Phil. Soc. 50: 419. 1911. 

 Coahuila ; type from Buena Vista. 



Leaves 6 to 10 mm. wide, rough-edged. 



8. Nolina palmeri S. Wats. Proc. Amer. Acad. 14: 248. 1879. 

 In canyons, Baja California ; type from Tantillas Mountains. 

 Acaulescent ; leaves 8 to 10 mm. wide, rough-edged. 



The roots ("amole") are said to be used as a substitute for soap. 

 Nolina palmeri hrandegeei Trel. (Proc. Amer. Phil. Soc. 50: 420. 1911) is a 

 form with the trunk up to 5 meters high. 



9. Nolina microcarpa S. Wats. Proc. Amer. Acad. 14: 247. 1879. 



Dry plains and hillsides, Chihuahua and Sonora. Arizona (type from Rock 

 Canyon) and' New Mexico. 



Leaves 6 to 12 mm. wide, rough-edged. 



10. Nolina durangensis Trel. Proc. Amer. Phil. Soc. 50: 421, 1911. 

 Chihuahua and Durango ; type from the city of Durango. 



About 2 meters high ; leaves 7 to 11 or even 20 mm. wide, rough-margined. 

 "Soyate" (Durango). 



11. Nolina elegans Rose, Contr. U. S. Nat. Herb. 10: 91. 1906. 

 Known only from the Sierra Madre of Zaeatecas. 



Leaves 50 to 60 cm. long, 12 mm. wide, rough-margined. 



12. Nolina rigida (Brongn.) Trel. Proc. Amer. Phil. Soc. 50: 422. 1906. 

 Anatis rigida Brongn. Ann. Sci. Nat. II. 14: 320. 1840. 



Known only from a drawing of SessS and Mocino,' believed to represent a 

 Mexican plant. 



Leaves about 10 cm. long, 4 to 5 mm. wide. 



13. Nolina bigelovii (Torr.) S. Wats. Proc. Amer. Acad. 14: 247. 1879. 

 Dasylirion Ugelorii Torr. U. S. Rep. Expl. Miss. Pacif. 4: 151. 1857. 



Dry mesas and hillsides, Sonora and Baja California. California and Ari- 

 zona ; type from Bill Williams Fork, Arizona. 



Trunk 1 to 2 meters high; leaves 1.5 to 2.5 cm. wide, the margin shredding 

 Into brown fibers. 



14. Nolina nelsoni Rose, Contr. U. S. Nat. Herb. 10: 92. 1906. 



Known only from the type locality, mountains near Miquihuana, Tamaulipas. 

 Trunk 1 to 3 meters high ; leaves 50 to 70 cm. long, 3 to 4 cm. wide, rough- 

 margined ; inflorescence 2 to 3.5 meters high. 



15. Nolina beldingi T. S. Brandeg. Zoe 1: 305. 1890. 



Baja California; type from mountains of the Cape Region. 

 Trunk 3 to 7.5 meters high, branched ; leaves 1.5 to 2 cm. wide. 

 Nolina beldingi dcscrticola Trel. (Proc. Amer. Pliil Soc. 50: 424. 1911) is a 

 nearly acaulescent form. 



' Proc. Amer. Phil. Soc. 50: pi. 17. 1911. 



