CBRTAIN AMERICAN ROSES. 63 



Museum, and one in my personal herbarium, both as collected 

 by Mr. Wooton in the Sierra Blanca. 



There is now before me a third representative of this strange 

 group of roses, and this from a region to the southward of 

 New Mexico, taken by a zoological traveler in another isolated 

 range, the Guadalupe Mountains of Texas. In compliment 

 to the discoverer of it, I name the species 



Rosa Vernonii. Next of kin to true R. stellata but grow- 

 ing twigs, also the peduncles, appearing retrorsely villous- 

 silky ; large spines more slender than in any of the foregoing, 

 also not notably dilated at base, conspicuously deflexed, white 

 and polished, numerous stout but short gland-tipped hairs or 

 bristles intervening ; leaves nearly all trifoliolate, glaucescent, 

 nearly glabrous, faintly pustulate above ; leaflets notably dis- 

 similar, the terminal much the largest and cuneate-obovate, 

 the small laterals not cuneate but obliquely oval, all deeply 

 crenate almost all around, the crenatures broader than high 

 and themselves glandular-dentate ; calyx closely villous- 

 hirtellous, also armed with a few stout prickles. 



Known only as collected in the Guadalupe Mountains, 

 Texas, by Mr. Vernon Bailey, 15 Aug. 1901, the specimens 

 in flower. 



Old twigs of this rose show a roughness made up of short 

 stout points, quite as in R. stellata, and the whole secret of 

 the villous appearance of its pubescence is this, that the 

 trichomes are developed here on only the lower or earthward 

 base of the short prickles, and these are so crowded that the 

 hairs, somewhat elongated, overlap. 



I append characters of another new rose from the far 

 Northwest. 



Rosa ai,cea. Dwarf and apparently compact, the branches, 

 and especially the flowering twigs copiously spinescent, the 

 spines all rather slender, straight, ascending, or on older 

 branches the larger and more persistent almost divaricately 

 spreading, but none deflexed or even recurved : leaves small. 



