178 BOTANY. 
3-parted or pinnate, with the divisions all linear; inflorescence cymose- 
paniculate; pedicels few, bracteolate below; involucre scales with two thick 
nerves; loosely calyculate beneath the head. A most variable species, 
already noted by Dr. Gray as being with S. spartioides and others inextri- 
cably confused—New Mexico, where it is one of the commonest plants 
of the dry hill-sides. 
Senecio spartiowss, T. & G.—Smooth, suffruticose, much branching; 
leaves 2-3’ long and a line wide, entire or very sparingly toothed; heads 
corymbose, or corymbose-paniculate; peduncles short, minutely bracteolate, 
calyculate scales subulate or narrowly lanceolate; involucre cylindrical, 
scales thin, nerves delicate; achenia silky-caneseent.—Valley of the Upper 
Arkansas, Colorado (589). 
SENECIO EREMOPHILUS, Richards—San Luis Valley, Colorado, a 
narrow-leaved form (561, 562); also New Mexico. 
Senecio Fremontu, T. & G.—Colorado; among the mountains at 
11,500 feet and upward (571, 572, 576); contracted above, smooth, striate. 
Mountains of Colorado, at 12,000 to 13,000 feet altitude (573, 575). 
Senecio BicgeLovi, Gray.—Erect, smooth, branching toward the top; 
lower leaves &-8’ long, less than an inch wide, irregularly sinuate or 
dentate, the tips of the teeth callous, somewhat falcate, tapering toward 
the base into a margined petiole; upper leaves sessile and more reduced; 
heads large, homogamous, nodding, calyculate scales subulate, involucral 
scales in two series, lanceolate, the inner ones more decidedly scarious- 
margined than the outer. Achenia oblong, distinctly ribbed, and in some 
eases under the lens faintly glandular; root a cluster of fleshy fibres — 
Mount Graham, at and above 9,000 feet (762); also from the Sierra Blanca, 
Arizona; also var. MoNOcEPHALUS (Gray?), Twin Lakes, Colorado (587, 674). 
Senecio Frnpteri, Gray (Pl. Fendl. p. 108)—Twin Lakes, Colorado 
(557). 3 
Senecio So~panetia, Gray (Proc. Acad. Nat. Sci. Phila. March, 
1863, p. 76).—Dwarf, sub-caulescent; root fibrous and fasciculate, glabrous 
and usually glaucous, monocephalous; lower leaves orbicular, 15-2’ in 
diameter, purplish beneath, on petioles 6’ long, which are widely scarious- 
margined; upper leaves smaller and on shorter petioles, the highest one 
