48 MISCELLANEOUS CIRCULAR 92, U. S. DEPT. OF AGRICULTURE 



VARIETIES DISTINGUISHED IN CULTIVATION 



Yucca gloriosa plicata Carriere. Yucca gloriosa recurrifolia Engelmann. 



Yucca treculeana Carriere. Spanish Bayonet. 



Range. — Texas (Matagorda Bay) and southward into Mexico (Sierra Madre, 

 Nuevo Leon), and along the Rio Grande to the mountains of western Texas. 



NAMES IN USE 



Spanish Bayonet (Tex.). Texas Spanish Bayonet. 



Spanish Dagger. 



Yucca torreyi Shafer. 15 Spanish Bayonet. 



Range. — Western Texas (desert plateau) to eastern Arizona; Mexico (Chi- 

 huahua) . 



Note on nomenclature. — Formerly designated as Yucca macrocarpa (Torrey) 

 Coville, some authors still maintaining this name. 



NAMES IN USE 



Broad-fruit Yucca (lit.). Palma Criolla. 



Spanish Dagger. Amole. 



Palmo. Torrey Yucca. 

 Spanish Bayonet. 



Yucca mohavensis Sargent. Mohave Yucca. 



Range. — From northwestern Arizona and southern Nevada into California 

 (over the Mohave Desert to the coast, in Monterey County); northward to 

 Monterey Bay; southward to northern Lower California. 



names in use 



Spanish Dagger. Tree Yucca. 



Spanish Bayonet. Mohave Yucca (lit.). 



Yucca schottii Engelmann. Spanish Bayonet. 



Range. — Southern Arizona (slopes of Santa Catalina, Santa Rita, and Rincon 

 Mountains); Mexico (Sonora). 



Note on nomenclature. — Formerly designated as Yucca macrocarpa Engel- 

 mann. 



NAMES in use 



Spanish Dagger (Ariz.). Spanish Bayonet. 



Schott Yucca. 



Yucca faxoniana Sargent. 1 " Spanish Bayonet. 



Range. — Southwestern Texas (desert plateau). 



Note on nomenclature. — Formerly designated as Yucca macrocarpa Sargent 

 not Engelmann, nor Coville. 



names in use 



Spanish Dagger (Tex.). Faxon Yucca. 



Sierra Blanca Yucca (lit.). Spanish Bayonet. 



14 Britton and Shafer (North American Trees, 157, 1908) have taken up this name in place of Yucca macro- 

 carpa (Torrey) Coville, and the change appears to be necessary. Yucca macrocarpa Coville (1893), based 

 on Yucca baccala var. macrocarpa Torrey (1858), is antedated by Yucca macrocarpa Engelmann (1881), 

 which was applied to another species. The Torrey Yucca was, therefore, without a tenable name when 

 it was renamed Yucca torreyi Shafer (1908). 



« Dr. Trelease (Missouri Bot. Gard. Kept. 1902, 116) has created for this plant the genus Samuela, desig- 

 nating the species as Samuela Faxoniana Trelease. Britton and Shafer (North American Trees, 159, 1908) 

 have followed Dr. Trelease in maintaining this name, the common name given to it being Sierra Blanca 

 Yucea. 



