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378 COMPOSIT 4 SENECIO 
slender-petioled, thin and delicate, lightly but rather evenly crenate; cau- 
line bracts very variable, from somewhat lyrate to lanceolate or subu- 
late: heads usually solitary: involucre subeampanulate, 3-4 lines high, 
of numerous broad thin bracts and one or more rather broad and her- 
baceous bractlets at base: rays 1U or more, broad and short, golden-yellow. 
Coeur d’Alene Mountains Idaho. 
++ ++ ++ ++ Stems 6-30 inches high, bearing some leaves and corym- 
vee! cymose heads:-involucre sparingly calyculate or nearly naked. 
at base. 7 
= Leaves all entire, rarely sparingly denticulate or toothed. 
S. fastigiatus Nutt. ].c. Cinereous with a fine and close pannose to- 
-mentum, or glabrate: stems strict, simple, 1-2 feet high, terminated by a 
fastigiate cyme of several heads, or sometimes with branches t+rminated 
with single and rather large heads: leaves lanceolate or spatulate-lanceo- 
late, obtuse. about 2 inches long, entire or sparingly dentate; upper often 
linear; lower cauline, and the sometimes oblong, radical tapering into 
slender petioles: beads 4-6 lines high: rays conspicuous: achene: glab- 
rous. Plains of Oregon and Washington to Idaho and British Columbia. 
= = Leaves from entire or serrate to pinnatifid in the same 
species, none pinnately divided. 
S. Purshianus Nutt.1 c. S. Howellii Greene. Densely white tomen-_ 
tose when young, tardily deciduous above: stems 4-10 inches high leafy: 
leaves thickish the lower ones lanceolate, from nearly entire to coarsely 
dentate or pinnatifid, slender-petioled; upper leaves pinnately lobed or 
arted into obleng divisions, all petioled or the uppern ost sessile: Heads 
ew to numerous, in a rather close fastigiate cyme, 6 lines high or more; 
involucre campanulate its numerous bracts lanceolate acute or acumi- 
nate, green with white margins, minutely puberulent, the tips pubescent : 
rays 6-12, elongated oblong, 6 lines Jong or more: achenes glabrous, light 
colored prominently striate, Rocky banks Eastern Oregon and Washing- 
ton to the Rocky mountains. 
S. aureus L. Sp. 870. Perennial, glabrous or very nearly so through- 
‘aut; stems rather slender, solitary or tufted, 12-30 inches high: l 
leaves cordate-orbicular or reniform, crenate-dentate, very obtuse and 
rounded, often purplish, 1-6 inches long, with long slender petioles; lower 
stem-leaves lanceclate or oblong, usually laciniate, pinnatifid or lyrate, 
the uppermost small, sessile, somewhat auriculate and clasping: heads 
seyeral, 8-10 lines broad, 4-5 lines high, slender-peduncled, in an open 
corymb; rays 8-12, golden-yellow; achenes glabrous; pappus white. In 
wet places in the high mountains, Alaska to California and across the con- 
tinent ; 
S. balsamite Muhl. Wild. Sp. 1999. Stems slender, 10-20 inches high, . 
woolly at the base and in the axils of the lower leaves: radical leaves slender- 
petioled, oblong, rarely slightly spatulate, very obtuse, narrow at the base, 
mostly thick, crenate, often purplish, 1-3 inches long, 3-6 lines wide, their 
petivlesand sometimes their lower surfaces persistently tomentose or woolly, 
or glabrous, throughout; lower stem leaves petioled, lanceolate or pinnatifid, 
the upper sessile very small: heads few or several, slender peduncled, 6-10 
lines broad, 3-4 lines high: rays 8-12: achenes usually bispidulous: on the 
angles, Dry soil, British Columbia to Washington, Texas, Nebraska and 
Nova Scotia. ; 
S. subnudus DC. Prodr. vi, 428. Very glabrous throughout: stems 
often decumbent at base, simple, slender, 6-10 inches high, nearly leafless 
above and usually bearing a single head: radical leaves obovate, slender- 
petioled, coarsely dentate; cauline very few, sessile, oblong to linear, incised 
