188 
BOTAKY. 
Humboldt and Clover Mountains, Nevada, and in the AValisatch and Uintas ; 
7-10,500 feet elevation ; June-September. (660.) 
Senecio lugens, Ricliardson. Perennial, wliite-tomcntose, deciduously 
lanate, or nearly smooth ; stems 6'-2° high, often several from one root ; 
leaves toothed or denticulate with gland-tipped teeth, sometimes entire, ob- 
scurely veined, 2-5' long, 6-12" wide ; the radical obovate or spatulate, 
obtuse, narrowed into a petiole ; the cauline sessile and partly clasping, grad- 
ually becoming lanceolate and passing into subulate bracts ; corymb open or 
dense ; heads rather large ; involucre with a few bractlets at the base, (calyc- 
ulate,) the scales hnear-lanceolate, acute, the tips usually blackish and seem- 
ingly withering, (sphacelate ;) rays 10-12, twice as long as the involucre ; 
achenia glabrous. — Occurring in one form or another from Arctic America to 
Oregon and California, and eastward to the Saskatchewan and the mountains 
of Colorado. Eeferred to the European and Asiatic S. ca?7ipesfris, DC, by 
Dr. Hooker. The numerous specimens examined may be arranged in three 
leading forms or varieties : — 
Var. HooKEEi. (S. lugens, Hook. FL Bor. Am., 1, 332, t, 114.) ''De- 
ciduously tomentose or naked, simple ; leaves entire, glandular toothed ; rad- 
ical oblong-subspatulate, cauhne lanceolate, acute, somewhat clasping; corymb 
dense ; scales of the involucre conspicuously sphacelate." Hook, /. c. — Varies 
with the leaves broader or narrower, and the corymb more lax and open. 
Hall & Harbour's 316 and Bolander's 5063 represent this form. From the 
vicinity of Salt Lake City to the Uintas near Bear River, frequent ; 4,500- 
10,000 feet elevation; May-August. (661.) 
Var. Parryi. Nearly glabrous, though at first shghtly webby ; leaves 
mostly not toothed, rather broad; involucral scales scarcely or not at all 
blackened at the tips.— Parry's 21, Hall & Harbour's 326, Vasey's 332, are 
examples of this form. Frequent from the base of the Sierras to the East 
Humboldt Mountains ; 4,500-9,000 feet elevation ; May-August. (662.) 
Var. EXALTATUS. Stem and corymb densely webby-tomentose ; leaves 
ample, more or less whitened, finely glandular-denticulate or entire ; heads 
small, in a dense compound somewhat umbel-like corymb ; scales of the invo- 
lucre with a dark mid-vein, and the ends somewhat blackened.— One of the 
forms of iS. exaltatus, Nutt., fide Gray, Fl Flail ^' Harbour, j?. 64. Colorado, 
(Piirry, 23 ! Hall & Harbour, 325! Vasey, 335!) New Mexico, (Fendler.) 
