418 TRELEASE— THE DESERT GROUP XOLIXE.^. [April 21, 



Southern Arizona. In the region of iV. microcaypa and Dasy- 

 lirioii JVJicclcri. 



Specimens examined: Arizona. Mule Mountains {Tourney, 



1894, — the type). Huachuca Mountains {"^Wilcox, 1892, and 2f,j, 



1894; Griffiths, 4831, 1903). Dragoon Summit {'^J\iscy, 1881, — 



leaves). Xogales (?Braiidcgce, 1892; Fcrriss, 1902; Coville, 1624, 



1903; Tliompson, 191 1). Sierra del Pajarito (?Trclcasc, ^Sy, 



1900). Boundary Line (?Parry, Bigclow, Wright & Schott, 



1443: Mcanis, 258, 2po, 1892). 



Lower panicle divisions more or less equaling the attenuate 

 "subtending bracts, with rather stiff spreading branchlets. 



N. ERUMPEN.S Watson, Proc. Amer. Acad. 14: 248. 1879. 



Dasylirioii cntiiipciis Torrey, Bot. Mex. Bound. 216. 1859. 



Bcaucarnca crnmpens Baker, Journ. Bot. 10: 326. 1872. 



Leaves usually 6-10 mm. wide and very rough- 

 edged, exceptionally narrower or smooth-edged. In- ^^""""^/^ 

 llorescence with pyramidal divisions 15 cm. long and C^ vC^--* 

 lower branchlets half as long. Fruit rather depressed, -^ ' '^'^ 

 5 X 5-7 mm. Seed very large, 4 mm. in diameter. 



Western Texas and adjacent Mexico. In the region of Dasy- 

 lirioii Iciophylluiii and D. Whcclcri JVisIicciii. 



Specimens examined: Texas. Western Texas {Wright, 1918, 

 1851-2, — the type of D. crnmpens: 6q2, 1849). Chisos Mountains 

 {Bailey, jp/,, 1901). Eagle Mountain (Bigcloic, 1852). Eagle 

 Spring {Hayes, 1858). Podrero {?Schott, 1855). Chihuahua. 

 Between El Paso and Chihuahua {Ji'isli-cenns, 2ip, 1846). 



N. erumpens compacta Trelease. 



Leaves almost as in te.vana, sometimes scarcely 5 mm. wide, the 

 edge either rough or smooth. Intlorescence with very compact ovoid 

 divisions scarcely 6 cm. long and branchlets about i cm. long. 



Extreme western Texas. 



Specimens examined: Texas. El Paso {Fcrriss, 1902, — the 

 type). Sierra Blanca {Trelease, 386, 1900). Sanderson {'fThonip- 

 son, 191 1 ). ^larathon {Lloyd, 1910). Presidio {Haivrd, 1880). 

 N. Greenei Watson in herb. Greene, Bot. Gaz. 5 : 56. 1880. — Name 

 onlv. 



