Bulletin University of New Mexico—No. 49 
to 5 cleft or parted, the radical cuneate. incisely pin- 
natfid or trifid; heads very numerous in an amiple 
loose panicle. 
40. seNEcIO. Tourn. GROUNDSEL, OF BUTTER-WEED. ) 
Herbs or shrubby, with alternate leaves, solitary 
or corymbed, many-flowered heads of chiefly yellow 
flowers; naked receptacle and pappus of very soft, 
numerous slender bristles. 
Heads an inch po or isle rayless, nodding, 
S. BIGELOVI. 
ends 1- Q im. or less high, erect, rays present, 
Stems few leaved or upper cmall, leaves not 
lonear, - - - - § FENDLERI. 
iy vie leafy. leaves or divisions linear, 
S. DOUGLASII. 
S. BIGELOVIA, ean d Fdlons G. \Robust, 2 to 3 ft. 
high, leafy up to near the raceform or simple panicu- 
late inflorescence, a few scattered hairs only when 
young; leaves from elongated-oblong to lanceolate, 
dentriculate or dentate, acute or acuminate; radical 
and lower cauline 3-6 inches long abrupt at base and 
naked-petioled, or tapering into a winged petiole or 
partly clasping base; upper lanceolate. Sandia Mts. 
S. FENDLERI, Gray. (Mountain R.) Very wool- 
ly, smooth when old; stems rather stout, 5-15 in. tall, 
leafy, the larger plants branching; leaves lanceolate, 
serrate to pinnatifid, radical sometimes almost entire; 
achenes glabrous. Bear Canon. 
..s. Douetasir. D. C. (Shrubby B.) Usually decid- 
edlyshrubby at base, more commonly parted into 3-7 
linear divisions; heads 1-3 to 1-2 in. high; rays 8-18. 
achenes finely conescent. Very common on the mesa. 
41. ouicus. Tourn. Thistles. 
Mostly biennial herbs, usually with large terminal 
heads of reddish-purple or lighter flowers. 
C. OCHROcENTROUS. Gray. Often tall 1 to 8 ft. 
leaves commonly but not always deeply pinnatifid and 
armed with long yellowish prickles; heads 1 to 2 in. 
high ; involucral bracts rather broad and flat, the viscid 
line on the back narrow or not rarely obsolete, tipped 
with a prominent spreading yellow bristle; corolla pur- 
ple, rarely white. Common at the base of the moun- 
tains and on the adjoining mesa and spreading down 
the arroyas. Occasionally on the open mesa. 
c. uNDULATUS. Gray. Usually lower 1-3 ft. high; 
(21) 
