1918] 
GREENMAN—MONOGRAPH OF SENECIO 63 
Monogr. Senecio, I. Teil, 24. 1901, and in Engl. Bot. Jahrb. 
32 : 20. 1902; Wooton & Standley, Contr. U. S. Nat. Herb. 19 : 
746. 1915. 
S. canus var. pygmaea Gray, Bot. Mex. Bound. Surv. p. 103. 
1859. 
A low herbaceous perennial, at first white-tomentose, some- 
what glabrate; stems solitary or cespitose, .5 to 1.5 dm. high, 
slender ; leaves chiefly basal, linear or linear-oblanceolate, 1 to 
3 em. long, 1 to 2 mm. broad, entire or inconspicuously dentate 
towards the apex, acute or obtusish, slightly revolute-mar- 
gined; upper stem-leaves few, bract-like; heads solitary or 
terminating the scapose stem in a few-headed corymbose 
cyme, 6 to 10 mm. high, radiate; involucre campanulate, spar- 
ingly calyculate, glabrous or nearly so; bracts of the involucre 
(13-)21, linear-lanceolate, 4 to 7 mm. long; ray-flowers 7 to 10, 
rays yellow; disk-flowers rather numerous; achenes hispidu- 
lous. 
Distribution: mountains of southwestern New Mexico. 
Specimens examined: 
New Mexico: hillsides, Copper Mines, Santa Rita del Cobre, 
May, 1851, Thurber 210 (Gray Herb., Kew Herb., Berlin 
Herb., and Mo. Bot. Gard. Herb.), түре, and at the same sta- 
tion, June, 1851, Bigelow (Gray Herb.) ; without definite local- 
ity, Mexican Boundary Survey 661 (U. S. Nat. Herb. Nos. 
47599, 47600). 
110. 8. Actinella Greene, Bull Torr. Bot. Club 10: 87. 
1883; Gray, Syn. Fl. N. Am. 1?: 384. 1884, and ed. 2, 1886; 
Greenm. Monogr. Senecio, I. Teil, 24. 1901, and in Engl. Bot. 
Jahrb. 32:20. 1902; Wooton & Standley, Contr. U. S. Nat. 
Herb. 19 : 745. 1915. 
A low herbaceous perennial, at first white-tomentose 
throughout, more or less glabrate; stem 1 to 3 dm. high, rising 
from a stoutish subhorizontal or ascending rootstock, leafy at 
the slightly decumbent base, nearly naked above; leaves sub- 
coriaceous, ovate, obovate to oblong-oblanceolate, rounded to 
obtuse at the apex, entire to slightly sinuate-dentate, nar- 
rowed below into a winged petiole, including the petiole 1.5 
