THE YUCCEAE. 113 



as in Y. baccata, they are rough like shagreen on the back 

 and frequently on the upper surface as well, and very 

 coarsely .gray filiferous. The flowers and fruit are as de- 

 scribed by Dr. Torrey, though the latter varies greatly in 

 form and size. Specimens in the Engelmann Herbarium, 

 collected by Dr. Wislizenus between El Paso and Chihuahua, 

 show that to this extent the Y. baccata australis of Engel- 

 mann included this species, though in large part it referred 

 to other things, principally what is called Y. australis above. 



Y. MOHAVENSIS Sargent, Gard. and For. 9: 104. (1896). 

 Silva. 10: 15. pi. 500. 



Y. macrocarpa Coville, Contr. U. S. Natl. Herb. 4:202. (1893). In 

 large part. Merriam, N. Amer. Fauna 7:358. pi. 14. 



Y. baccata Watson, Bot. Calif. 2 : 164. Trelease, Kept. Mo. Bot. 

 Gard. 3 : 162. pi. 2, 48. 4 : 185. pi. 20. Amer. Florist. 8 : 57. f. 

 Orcutt, West Amer. Scientist. 6 : 134. 



Y. schidigera Roezl, Belg. Hort. 1880 : 51. 



Habit and general characters of the preceding. Style very short, 

 contracted. Fruit mostly smaller. Plates 68. 81 , f. 6. 



Western Arizona and Southern Nevada to the vicinity of 

 San Diego, California, and Alamo, Lower Calif ornia, and as 

 far north as Monterey, where Parry first collected it. 

 Plate 94, f. 1. 



Though the principal observed difference between this 

 and the preceding lies in the style, which is contracted and 

 short in the one, and elongated in the other, the great area 

 of desert country lying between their known respective 

 localities makes it desirable to recognize them as distinct 

 species. From the locality there can be no doubt that 

 what Roezl collected near San Diego in 1869 and sold to 

 De Smet under the name of Y. schidigera was Y. 

 Mahavensis, which Dr. Engelmann regarded as intermediate 

 between Y. baccata and its variety australis as understood 

 by him. 



In addition to the names applied in this paper as syn- 

 onyms or otherwise to various species of Yucca or other 



