STANDLEY TREES AND SHRUBS OF MEXICO. 101 



Yucca acrotrlcha Schiede, Linnaea 4: 230. 1829. 



Ronlinia gracilis Brongn. Ann. Sci. Nat. II. 14: 320. 1840. 



San Luis PotosI, Veracruz, Hidalgo, and Queretaro ; type from Mount Orizaba. 



Trunk 1 meter .high or more ; leaves less ttian 1 meter long, 6 to 10 or rarely 

 15 mm. wide, green or glaucescent ; inflorescence 3 to 5 meters high or larger. 

 " Cucharilla " (San Luis PotosI, Urbina). 



11. Dasylirion grarainifolium Zucc. Allg. Gartenz. 6: 259. 1833. 

 San Luis PotosI ; described from cultivated plants. 



Leaves about 1 meter long, green, smooth, lustrous. 



12. Dasylirion durang-ense Trel. Proc. Amer. Phil. Soc. 50: 438. 1911. 

 Known only from Durango, the type locality. 



Leaves 1 meter long or shorter, glaucescent. 



13. Dasylirion serratifolium (Schult.) Zucc. Allg. Gartenz. 6: 258. 1838. 

 Yucca serratifolia Schult. Syst. Veg. 7: 1716. 1830. 



Dasylirion laxiflorum Baker, Journ. Bot. Brit. & For. 10: 299. 1872. 

 Oaxaca ; described from cultivated plants. 



Plants suba caulescent ; leaves 1 meter long or shorter, 1.5 to 3.5 cm. wide, 

 whitish. 



14. Dasylirion wheeleri S. Wats. ; Rothr. in Wheeler, Rep. U. S. Surv. 100th 

 Merid. 6: 378. 1878. 



Dasylirion wheeleri ^isUzeni Trel. Proc. Amer. Phil. Soc. 50: 439. 1911. 

 Chihuahua. Western Texas to Arizona (tj'pe from Ash Creek). 

 Trunk 1 meter high or less ; leaves 1 meter long or shorter, glaucous or 

 green, nearly smooth ; inflorescence 3 to 5 meters high. 



15. Dasylirion berlandieri* S. Wats. Proc. Amer. Acad. 14: 249. 1879. 

 Known only from the type locality. La Silla, Monterrey, Nuevo Leon. 

 The leaves of this species have not been collected. 



16. Dasylirion longissimum Lem. 111. Hort. Lem. 3: Misc. .91. 1856. 

 Dasylirion qtiadrangvlatuni S. Wats. Proc. Amer. Acad. 14: 250. 1879. 

 Dasylirion juncifolium Rehnelt, Garten welt 11: 77. 1906. 

 Tamaulipas to Hidalgo ; described from cultivated plants. 



Trunk 1 to 2 meters high ; leaves sometimes 2 meters long, 3 to 8 mm. wide, 

 green, dull; inflorescence 2 to 6 meters high. " Junquillo " (Quer6taro, 

 Hidalgo). 



11. SMILACACEAE. Smilax Family. 

 1. SMILAX L. Sp. PI. 1028. 1753. 



Reference: A. De Candolle in DC. Monogr. Phan. 1: 1-213. 1878. 



Scandent shrubs; rhizomes often tuberiferous ; stems often armed with 

 spines ; leaves alternate, usually persistent, palmately nerved, the petiole often 

 tendril-bearing ; flowers small, dioecious, umbellate, the umbels axillary ; fruit a 

 small globose berry. 



The species of catbrier, greenbrier, or horsebrier, because of their spiny stems, 

 often form almost impenetrable thickets. 



^ In honor of Jean Luis Berlandier, a Belgian, who made extensive collections 

 between 1827 and 1830 in northeastern Mexico, especially in Tamaulipas, San 

 Luis PotosI, Nuevo Leon, and Coahuila. The larger portion of his botanical 

 collections was obtained in Texas. He died at Matamoros in 1851. His plants 

 were widely distributed, and some of them are in the U. S. National Herbarium. 



