I9II-] TRELEASE— THE DESERT GROUP XOLIXE.E:. 431 



Rose, loij/, 1905, — the type of B. cvdipiis; Trclcase, i, 1903; Pur- 

 pus, I2f,^a in part, 1905. and 2jo^, 1907). Cultivated. New 

 York Botanical Garden {Taylor, 2jys4, 1906). 



Dasylirion. 

 Zuccarini, Allgem. Gartenzeit. 6: 258, 303. 1838. — Plant. Nov. 

 vel Alinus Cognit. 4: 221. pi. i (Abhandl. Akad. Aliinchen. CI. II. 

 3.^Denkschr. 16). 1840; — ^Plant. Nov. etc. 5: 19. (Abhandl. 

 Akad. Munchen. CI. II. 4. = Denkschr. 19). 1845. — Kunth, Enum. 

 Plant. 5: 38. 1850, — as Dasyliriuui. — Baker, Journ. Bot. 10: 296. 

 1872; Journ. Linn. Soc, Bot. 18: 237. 1880. — Rose, Contr. U. S. 

 Nat. Herb. 10: 89. 1906. — Though primarily based on Yucca 

 pitcainiiccfolia {Hcclitia gloiiicrata) and made to include with ques- 

 tion Yucca [Noliua] lougifoUa, it finally stood with its author for 

 the prickly-leaved sotols, of which D. scrratifolium and D. gramini- 

 foliuui were definitely included in his first publication on the genus 

 and mark its type. 



Leaves 2-edged, usually somewhat concave and irregularly keeled, prickly- 

 margined and usually roughened with minute intervening denticles or 

 serratures (pp. 431-440). Eudasylirion. 



_Fruit-small (3-5 mm. wide). 



Fruit normally with moderately deep notch, narrowly elliptical to 

 obovate, the style not surpassing the wings. Perianth segments 

 about 2 mm. long. Leaves elongated, rather wide (usually 15-20 

 mm.). 



Prickles prevailingly upcurved. 



Dasylirion cedrosanum Trelease. 



Dasylirion sp. Kirkwood, Pop. Sci. ^Monthly. 75: 438, 445. /. 



Shortly caulescent. Trunk 1-1.5 m. high. Leaves 20 mm. wide, 



upwards of i m. long, slightly brush-tipped, glaucous, 



slightly rough-keeled, dull; prickles mostly 10-15 mm. 



apart, 2-5 mm. long, yellow, becoming red upwards. 



Inflorescence 5 m. high. Fruit very narrowly 



elliptical, 4-5 X 7-9 nim., the style barely half as long as the narrow 



deep notch. Seed 2 X 3-5 mm. PL 3, 12, if,. 



Northeastern Mexico. Overlapping the range of Noliua 

 ccspitifcra. 



