110 PITTONIA. 
Hills of the Yainax Indian Reservation, southeastern 
Oregon, 1893, Mrs. R. M. Austin; types in my own ~ 
herbarium. 
Rosa ALDERSONII. Apparently a low bush, the slender 
stem and branches glabrous and very glaucous, destitute of 
prickles except as to a pair of very stout and conspicuous, — 
nearly straight but slightly deflected ones beneath each 
stipule: leaflets 7, ovate or oval, obtuse or truncate, simply 
or doubly serrate-toothed, 4 to ? inch long, dull-green and 
glabrous above, paler and villous beneath ; stipules also vil- 
lous and with few scattered marginal glands; the rachis of 
the leaf sparingly prickly: calyx-tube smooth and glabrous, 
the segments pubescent, villous-margined: corollas small. 
Collected on Witch Creek, San Diego Co., California, in 
June 1894, by R. D. Alderson; type specimens in my own 
herbarium. 
CHRYSOTHAMNUS LaRIcINus. Allied to C. stenophyllus, more 
decidedly shrubby and quite diffusely branching, the stem 
and branches with a glabrous but very white bark: leaves 
very short and almost acerose, ł inch long or more, acute, . 
glabrous except as to the scabrous-ciliolate margins: heads 
rather few and subcorymbose at the ends of all the branch- 
lets; bracts of the involucre subcoriaceous, in about 3 ranks, 
subcarinate, all with very acute or acuminate somewhat 
spreading tips: corollas deeply cleft and the segments re 
curved: style-tips subulate, pubescent: pappus bristles very 
rigid. 
Known only as collected on or near the Moqui Indian 
Reservation in northeastern Arizona, August or September, 
1899, by Walter Hough; the type in the U. S. Herhen 
