190 
BOTANY. 
crenately-serrate radical leaves, and the cauliiie ones lyratc or lanceolate, pin- 
nately toothed and cleft. British America, and the Northern United States 
to Nevada and California. East Humboldt Mountains ; 6,500-9,000 feet ele- 
vation ; August. (667.) 
Var. OBOVATUS, T. & G. Radical leaves roundish-obovate or broadly 
spatulate, toothed or serrated. — Throughout British America and the United 
States to Virginia, and westward to Nevada. Smooth forms ; plant rather 
low. Pah-Ute range, Ruby Valley, and East Humboldt Mountains, Nevada ; 
5-9,000 feet elevation. (668.) Also a lanuginous form, mostly taller, 15-20' 
high. Wahsatch Mountains ; 8,000 feet elevation ; June-August. (669.) 
Var. BOEEALTS, T. & G. Smooth ; radical leaves thickish, obovate or 
spatulate, entire or crenulate-toothed at the apex only. — Arctic America, and 
along the Rocky Mountains to New Mexico. Ruby and Goose Creek Valleys, 
Nevada; 6-6,500 feet elevation ; July-September. (670.) 
Var. CROCEus, Gray. Froc. Acad. Phil., March, 1863, 7?. 68. Smooth ; 
radical leaves roundish-oval, more or less crenately toothed, cauline ample ; 
corymb rather compact ; rays saffron-yellow. — Mountains of Colorado. City 
Creek Canon, AYahsatch, and Bear River Canon, Uintas ; 6-8,000 feet eleva- 
tion ; May-August. (671.) 
Senecio canus, Hook. Whitish-tomentose throughout; stems tufted, 
2-12' high ; radical leaves obovate, obtuse, narrowed into short petioles; the 
cauline sessile, lanceolate, pinnately cleft, or with a few teeth near the base, 
rarely entire ; heads rather large, few in a simple corymb ; involucre nearly 
ecalyculate ; rays 8-12, not twice as long as the involucre ; achenia glabrous.— 
Saskatchewan to Oregon and California, the Upper Missouri and Colorado. 
Peaks of East Humboldt Mountains, and of the Uintas; 9-12,500 feet 
altitude; July, August. Dwarf alpine forms, 2-1' high, like Brewer's 
1905. (672.) 
Var. ERADIATUS. Rays none; radical leaves few-toothed at the apex, 
cauline nearly entire.— Plant 4' high. Top of a high peak in the East Hum- 
boldt Mountains ; 10,000 feet elevation; August. (673.) 
Senecio Fendleri, Gray. PL Fendl. 108. Perennial, webby-canescent, 
at length nearly smooth ; stems a foot high or less, solitary or few from a 
single tap-root, leafy, corymbose at the summit ; leaves obovate-oblong, deeply 
lyrate-pinnatifid, the lower and radical ones narrowed into a short wingless 
petiole; upper ones sessile; segments cuneate-oblong, numerous, incisely 
