THE YUCCEAE. AL 
No other species of this type could have been collected 
about San Diego, where H. Whipplei occurs in abundance, 
by Roezl, who in 1869 reintroduced it into European gardens 
through De Smet, under the name Y. Ortgiesiana, so that 
there appears no doubt as to the proper reference of this 
synonym. 
On April 3d, 1858, Professor Newberry collected leaves 
of a plant ‘‘ growing in tufts on rocks’’ at the mouth of 
Diamond river, at the eastern end of the grand cafion of the 
Colorado, in northern Arizona, which neither Professor 
Torrey* nor Dr. Engelmann could distinguish from those of 
this species as collected by Bigelow at the Cajon pass in 
California. The single leaf of Newberry’s collection in the 
Engelmann herbarium is glaucous, falcate, elongated and 
scarcely to be referred elsewhere, — but the locality is so 
far from the known range of this species on the other side 
of the desert as to warrant doubt as to the correctness of 
the record, and I know of no confirmation of this isolated 
locality. 
CLISTOYUCCA (Engelmann) Trelease. 
Perianth oblong to globose, of nearly distinct thick ob- 
long or lanceolate segments often incurved at end. Fila- 
ments nearly free, thickened, mostly outcurved above; 
anthers sagittate, horizontal. Ovary ovoid, tapering to the 
transiently stellate 6-lobed openly perforate stigma. Fruit 
dry, spongy about a papery core, 6-celled, indehiscent. 
Seeds rather thin, flat, nearly round; albumen not rumi- 
nated. — Large tree, with short thick and pungent rough- 
margined leaves and compact sessile panicle from an ovoid 
large-bracted bud. 
C. arborescens (Torrey) Trelease. 
Yucca Draconis (2) arborescens Torrey, Bot. Whipple. 147. (1857). 
Y. brevifolia Engelmann, Bot. King. 496. (1871). Trans. Acad. St. 
Louis. 8: 47, 213, 371. — Palmer, Amer. Journ. Pharm. 50: 587. — 
* Ives, Rept. upon the Colorado river of the West. Part IV. Botany- 
29. 
