[Vor. 3 
136 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
Var. flavulus (Greene) Greenm. comb. 
S. flavulus Greene, Pittonia 4:108. 1900; Rydb. Bull. Torr. 
Bot. Club 27:185. 1900; Fl. Colo. 397. 1906, in part. 
S. Balsamitae Nels. in Coulter & A Manual Cent. 
Rocky Mountains 583. 1909, in part, not Muhl. 
Stems slender, 1.5 to 4 dm. high; leaves relatively small, 
the radical and lower stem-leaves ovate-rotund to ovate- 
oblong, .8 to 4 cm. long, 8 to 20 mm. broad, rounded to acute at 
the apex, crenate to serrate-dentate, more or less cordate at 
the base; petioles 1 to 8.5 cm. long; upper stem-leaves petio- 
late and sublyrate or sessile and laciniate to entire. 
Distribution: southern Wyoming and Colorado. 
Specimens examined : 
Wyoming: river bottoms, Encampment, Carbon Co., alt. 
2175 m., 15 June, 1901, Tweedy 4132 (U. S. Nat. Herb.). 
Colorado: Walden, Larimer Co., 8 July, 1908, Goodding 
1494 (U. S. Nat. Herb. and Mo. Bot. Gard. Herb.) ; Sapinero, 
alt. 2285 m., 19 June, 1901, Baker 176 (Gray Herb., U. S. Nat. 
Herb., Greene Herb., and Mo. Pot. Gard. Herb.) ; Black Cañon, 
alt. 2135 m., 12 June, 1901, Baker 114 (Gray Herb., U. S. Nat. 
Herb., and Mo. Bot. Gard. Herb.); Veta Pass, 15 July, 1896, 
Shear 3592 (U. S. Nat. Herb.); Arboles, Archuleta Co., 15 
June, 1899, Baker 707 (Greene Herb., Berlin Herb., and Mo. 
Bot. Gard. Herb.), TYPE. 
56. S. Burkei Greenm. Ottawa Nat. 25:114. 1911; Ann. Mo. 
Bot. Gard. 2:626, pl. 20, fig. 1. 1915. 
An herbaceous perennial, glabrous or nearly so; stems erect, 
3 to 9 dm. high, simple or rarely branched, striate; lower 
leaves petiolate, ovate-oblong, 1 to 7 cm. long, 1 to 3.5 cm. 
broad, obtuse or rounded at the apex, crenate to serrate-den- 
tate, cuneate to subtruncate at the base; petioles 2 to 12 cm. 
long; stem-leaves petiolate and sublyrate to sessile and pin- 
natisect; inflorescence a terminal few to many-headed corym- 
bose cyme; heads 10 to 12 mm. high, radiate; involucre cam- 
panulate, calyculate; bracts of the involucre usually 21, linear- 
lanceolate, 6 to 8 mm. long, glabrous or floccose-tomentulose, 
more or less tinged with purple; ray-flowers about 12, rays 
yellow; disk-flowers numerous; achenes glabrous. 
