WESTERN ASTBRACBAE. 11 



lous, the heads }i inch broad, nearly hemispherical, their 

 bracts in several series and imbricated, spatulate-oblong to 

 oval, pungently acute, green-herbaceous mainly, but with cal- 

 lous whitened and entire margins : rays manifest, deep-yellow : 

 achenes nerveless, glabrous and shining ; pappus coarse. 



Subalpine on Mt. Stanford, eastern California, C. F. Sonne ; 

 the type specimens collected in August, 1888, the plant not 

 otherwise known. 



Pyrrocoma microdonta. Stems erect, a foot high, not 

 stout, with smooth whitish and shining bark, toward the sum- 

 mit bearing a rather strict raceme of 5 or 6 heads ; basal 

 leaves lanceolate, entire, or the margins of some obscurely 

 denticulate ; cauline leaves ovate, lanceolate, sessile by a broad 

 base, their margins rather closely and minutely callous-den- 

 ticulate or spinulose : involucres between hemispherical and 

 turbinate, j4 inch high and about as broad, much imbri- 

 cated, the almost corneous bracts with broad subsquarrose 

 green tips, these marginally denticulate, on the back scaberu- 

 lous : rays not very conspicuous, light-yellow. 



Inyo County, California, at Resting Springs Valley, 6 Feb., 

 1891, Coville and Funston ; being n. 269 of the Death Valley 

 collection, as in U. S. Herb. 



Pyrrocoma sessiliflora. Stems many, ascending, a foot 

 high or more, with glabrous straw-colored bark, subspicately 

 fioriferous from below the middle : basal leaves 3 inches long, 

 linear-lanceolate, very firm, commonly entire, sometimes 

 toothed, always sharply serrulate-scabrous, the flattened and 

 subpetiolar base hispid-ciliate ; cauline remote, lance-linear, 

 sessile : involucres turbinate, small, sessile singly in the axils 

 of the leafy bracts ; those of the involucre cartilaginous, but 

 with short, broadly triangular abruptly very acute green tips : 

 rays few but large for the heads, light-yellow. 



Collected somewhere in southern Nevada, at an altitude of 

 3,000 feet or more, in 1898, by C. A. Purpus ; his n. 6340 as 

 in U. S. Herb. Superficially recalling P. glomerata of the 

 far Northwest ; in character wholly different. 



