430 TRELEASE— THE DESERT GROUP XOLINE^. [April 21, 



Bcaiicanica rccun'ata stricta Baker, Journ. Linn. Soc, Bot. 18: 

 234. 1880. 



B. glaitca Roezl, Belg. Hort. 33: 138. 1883. 



B. Purpusi Rose, Contr. U. S. Nat. Herb. 10: 89. 1906. — 

 Purpus, ]\I511er's Deutsch. Gartn.-Zeit. 23 : 223. /. 



Trunk moderately swollen, irregularly rather few-branched. 

 Leaves more or less keeled or plicate, 8-15 mm. wide, 

 scarcely i m. long, the yellowish margin usually 

 minutely serrulate-scabrous. Inflorescence short- 

 stalked, ovoid-panicled, decompound with narrow 

 divisions 20 cm. long and short branches, the lower 

 with branchlets 3 cm. long. Perianth segments 2 mm. long. Fruit 

 broadly elliptical. 8-10 X 12 mm. Seed 3 X 4-5 "''"''• irregularly 

 3-lobed, smooth. — PL 8, 14. 



South-central Mexico. Associated with the next and Dasylirion 

 lucidnui. 



Specimens examined: Puebl.\. Tehuacan (Rose, Painter & 

 Rose, 10136, 1905, — the type of B. Purpusi; Rose & Rose, 11220, 

 1906; Purpus, 2^97, 1907). San Luis Tultitlanapa {Purpus, 5080, 

 1908). Oax.\ca. Tomellin Canon {Rose & Rose, ii42'/a and h, 

 1906). Almoloyas to Sta. Catarina ( ?Coii::atti, 1644, 1906). 



B. GRACILIS Lemaire, 111. Hort. 8. misc. p. 61. 1861. 



B. ccdipus Rose, Contr. U. S. Nat. Herb. 10: 88. pi. pj. 1906.— 



AlacDougal, Publ. Carnegie Inst. 99. pi. ig. 

 '^Nolina histrix Hort. 



Trunk enormously swollen below, variously and irregularly 

 branched. Leaves very glaucous, 4-7 mm. wide, 

 scarcely 50 cm. long, minutely but sharply serrulate- 

 scabrous on the paler margin. Inflorescence short- 

 stalked, ovoid- or oblong-panicled, decompound with 

 divisions scarcely 30 cm. long and weak branches half 

 as long, the lower often similarly branched. Perianth segments 

 scarcelv 2 mm. long. Fruit round-elliptical, 7-9 X 10 mm. Seed 

 2X3 mm., smooth. — PL 4, ii. 



South-central Mexico. Associated with the preceding. 

 Specimens examined: Puebla. Tehuacan {Rose, Painter & 



