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



Fruit with very shallow notch, broadly elliptical, the style rather surpass- 

 ing the wings. Prickles prevailingly upcurved. 



D. TEXANUM Scheele, Linnsea. 23: 140. 1850. — Bray, Bull. Univ. 



Tex. 82. pi. is; Bot. Gaz. 32 : 288. /. 



Shortly caulescent or with buried trunk. Leaves 10-15 mm. 

 wide, scarcely i m. long, somewhat brush-tipped, 

 green, smooth or rough-keeled, glossy: prickles 5-10 Sy(/^X4!\\\ 

 mm. apart, 2-3 mm. long, yellow, becoming brownish. U' '^■ 

 Inflorescence 3-5 m. high. Fruit elliptical, 4-6 X 7-8 A 

 mm., the very short style equaling or surpassing the 

 open shallow notch. Seed ?^ — PI. 12, 75. 



South-central Texas. In the range of Nolina tcxana and Liiid- 

 hckneriana. 



Specimens examined : Texas. \' icinity of New Braunfels (Liiid- 

 hcimcr, 548, 1845, — apparently the type, 5^p, 1846, 1211-121^, 1849). 

 Blanco Canon (Rcz'crclwii, i6oj, 1885). Putnam (Trclcase, 1892). 

 Gillespie County (Jcrmy). Kerr County (Heller, 1929, 1894; Bray, 

 228, 1899). Hueco Tanks {Miilford, go, 1895). Sanderson {Wein- 

 berg, 1907; Thompson, 1911). Marathon {Lloyd, 1910). Com- 

 stock {Tlionipsou, 191 1). Ft. Davis {Blake). 



D. texanum aberrans Trelease. 



Differing from the type in its dull somewhat glaucous leaves, 15 

 mm. wide. 



Northern Mexico. 



Specimens examined : " States of Coahuila and Nuevo Leon " 

 {Palmer, ipf,, 1880, — the type). 



Fruit rather small (5-6 mm. wide), subcordate, the style not surpassing 

 the wings. 



D. simplex Trelease. 



Acaulescent. Leaves 7-10 mm. wide, scarcely i m. long, rather 



sparsely very long-fibrous at tip, green, smooth, glossy : prickles 



10-15 or 20 mm. apart, 2-3 mm. long, rather straight, 



'W<r^ vF] prevailingly upcurved, yellow, the upper half becom- 



_/[___5/£^ ing brown or finally almost black, the margin nearly 



smooth between them. Inflorescence (typically?) 



small, the staminate with one to three small branches to each division 



