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. Monavensis Sargent, Gard. and For. 9: 104. (1896). 
Silva. 10:15. pl. 500. 
Y. macrocarpa Coville, Contr. U. 8. Natl. Herb. 43202. (1893). In 
large part. — Merriam, N. Amer. Fauna 7:358. pl. 14. 
Y. baccata Watson, Bot. Calif. 2: 164.—Trelease, Rept. Mo. Bot. 
Gard. 8: 162. pl. 2,48. 43185. pl. 20. — Amer. Florist. 8 3 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 California, 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 
8 
