1916] 
GREENMAN— MONOGRAPH OF SENECIO 149 
S. aureus var. Balsamitae Torr. & Gray, Fl. N. Am. 2:442. 
1843, in part; Gray in Boston Jour. Nat. Hist. 6:231. 1857; 
Gray, Syn. Fl. N. Am. 1? :391. 1884, and ed. 2, 1886, in part. 
S. camporum Greenm. Monogr. Senecio, I. Teil, 24. 1901, 
and in Engl. Bot. Jahrb. 32:20. 1902. 
S. pseudotomentosus Mack. & Bush, Trans. Acad. Sci. St. 
Louis 12:88, pl. 17. 1902. 
An herbaceous perennial, usually more or less persistently 
white-floecose-tomentulose, rarely glabrous throughout ; stems 
erect, one to several from a common base, 1 to 4 dm. high; 
leaves variable, the lower ovate-oblong to lanceolate or some- 
what oblanceolate, 1 to 8 em. long, .5 to 4 em. broad, rounded 
to obtuse at the apex, crenate to serrate-dentate, subcordate to 
gradually narrowed at the base; petioles 1 to 15 em. long; 
stem-leaves petiolate and sublyrate to sessile and very ir- 
regularly pinnatisect; inflorescence a terminal corymbose 
cyme; heads usually numerous, 8 to 10 mm. high, radiate; 
involuere eampanulate, calyculate; bracts of the involuere 13 
(21), linear-lanceolate, 5 to 6 mm. long, glabrous or slightly 
tomentulose, penicillate; ray-flowers 10 to 12, rays yellow; 
disk-flowers numerous; achenes usually hispidulous along the 
angles, sometimes glabrous. 
Distribution: southwestern Ontario to Saskatchewan and 
eastern Montana, south to Louisiana and Texas. 
Specimens examined: 
Ontario: on sand dunes, Port Franks, Lambton Co., 24 
May, 1906, and 9 Aug. 1907, Dodge 298, 108 (U. S. Nat. 
Herb.) ; Camlachie, 18 June, 1901, Macoun (Gray Herb. and 
U. S. Nat. Herb.) ; northeast of Sarnia, 5 June, 1897, Dodge 
297 (U. S. Nat. Herb.). 
Manitoba: Stony Mountain, 14 June, 1887, Fowler (Mo. 
Bot. Gard. Herb.) ; open places south of Sewell, 12 June, 1876, 
Macoun 12232 (Geol. Surv. Canada Herb.) ; gravelly or rocky 
places, Fort Ellice, 20 June, 1879, Macoun 14799 (Geol. Surv. 
Canada Herb.). 
Saskatchewan: Long Lake (Last Mountain Lake), 6 July, 
1879, Macoun 48 (Gray Herb.). 
