440 



TRELEASE— THE DESERT GROUP NOLIXE.^. [April 21, 



North-central Mexico and adjacent Texas, — apparently grading 

 into/). Jllwiicri. Adjoining or overlapping the area of D. WJiccleri 

 and Nolina crump ens. 



Specimens examined: Chihuahua. Paso del Xorte [Juarez] 

 {Wislisenns^ 218, 1846, — the type; ?Stcar)is, 1910, — with smaller, 

 slightly roughened dull leaves). Without locality (TJiiirbcr, 1852). 

 Texas. El Paso {Dez^'cy, 1891 ; Wagner, p8j, 1892). Franklin 

 Mountains (Rose, Stajidlcy & Russell, 12280, 1910). 



Fruit large (8-9 mm. wide), the style surpassing the wings. 



D. Berlandieri Watson, Proc. Amer. Acad. 14: 249. 1879. 



Habit ? Leaves ? Inflorescence apparently ample. Bractlets 

 rather long, lanceolate, finely toothed. Perianth seg- 

 ments 2-4 mm. long. Fruit round-elliptical, 7-9 X 

 7-10 mm., the style rather exceeding the very open 

 moderately deep notch. Seed ? — PL 12. 



Northeastern ?^Iexico. 



Specimens examined: Nue\T) Leon. La Silla, Monterey {Bcr- 

 landier, 3218, June, 1843, — the type). 

 Leaves 4-sidcd, unarmed. Quadra ngul.'KT.t:. 



D. LOXGissiMUM Lemaire, 111. Hort. 3. misc. p. 91. 1856. 



D. quadrangulatuui \\"atson, Proc. Amer. Acad. 14: 250. 1879. — 

 Gartenflora. 36 : 280. /. 75. — Bull. Soc. Tosc. Ort. 9 : 236. /. ; 

 35: 331. pi. 6. — Die Natur. 34: 340. /. — Hooker, Bot. Mag. 

 iii. 56. pi 'JI4C). 

 D. jujicifoliuiii Rehnelt, Gartenwclt. 11 : //. f. 1906. 

 Caulescent. Trunk 1-2 m. high. Leaves narrowly linear, 3-8 

 mm. wide, at length 2 m. long, not brush-tipped, green, dull, rhombic 

 -f-.^ or square in section, smooth, the edges minutely gran- 

 ular-roughened or further with very low elevations 

 \</^ 10-30 mm. apart representing the prickles of other 

 species. Inflorescence 2-6 m. high. Perianth seg- 

 ments 3-4 mm. long. Fruit broadly obovate or elliptical, 5-8 X 7~io 

 mm., the st\le surpassing the open very shallow notch. Seed 3 X 3-4 

 mm. — PL g, 12. 



Eastern Mexico. Of wide range, overlapping the regions of 

 Nolina Nelsoni, Caliban us and D. acrotrichc. 



