THE YUCCEAE. 41 



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 canon of the 

 Colorado, in northern Arizona, which neither Professor 

 Torrey* nor Dr. Engelinann 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 (?) arborescens Torrey, Bot. Whipple. 147. (1857). 

 F. brevifolia Engelmann, Bot. King. 496. (1871). Trans. Acad. St. 

 Louis. 3 : 47, 213, 371. Palmer, Amer. Journ. Pharm. 50 : 587. 



* Ives, Kept, upon the Colorado river of the West. Part IV. Botany. 



