704 CALIFORNIA ACADEMY OF SCIENCES. . 



pedately lobed and lobes oblong, rarely again toothed, 

 blades 6" or less long, all on a slender petiole about half 

 their length, and obtuse or barely acute, alternate, thin; 

 plants racemosely branched above with solitary heads on 

 slender peduncles, 2' or less long; flowers light yellow; 

 few, in small heads, 2" long and 2" wide, flowers and 

 scales pubescent; akenes with thick lateral nerves and 

 usually a slender awn at each angle, narrowly oblong, 

 scabrous pubescent. 



Senecio Bigelovii Gray. I can find no crucial charac- 

 ter separating this from S . Riisbyi Greene. 



Cnicus clavatus. 



No. 5715. August 2, Fish Lake, Utah, 10,000" alt., 

 in gravel. 



Plants tufted from a deep perennial root, erect, 2-2|° 

 high, glabrous throughout; leaves lanceolate, root leaves 

 about 1° long, stem leaves 6-8' long, all deeply pinnatifid 

 with lanceolate, very shortly spinose lobes, spines i" long 

 or less ; leaves percurrent by a narrow wing (3 ' high) be- 

 low the petiole; heads on peduncles 2' long, involucrate 

 with several leafy bracts; scales imbricated, coriaceous 

 except at tips of the innermost, all but the uppermost 

 spinose with short spines, and these also with lateral 

 spines; bracts imbricated, the outer somewhat shorter, 

 the upper all with dark tips; flowers white, corolla lobes 

 ^ the tube; at least some of the pappus awns clavate 

 thickened at the apex in each flower, short, barely ex- 

 ceeding the corolla tube; heads 2' high, nearly hemi- 

 sperical to campanulate. This grows at high elevations 

 close to snow, in the same situations in which C. Eatoni 

 is found, but it is conspicuously different from that 

 species. 



Cnicus calcareus. 



No. 5695bh. July 27, Bromide Pass, Henry Mountains, 

 Utah, 10,000° alt., in gravel. 



