COMPOSITAE. Vor. II. 
21. Artemisia Bigelovii A. Gray. Bigelow’s 
Sage-Bush. Fig. 4591. 
nea Bigelovii A. Gray, Pac. R. R. Rep. 4: 110. 
1856. 
Perennial, shrubby, silvery-canescent throughout, 
8’-15’ high, much branched, the branches erect. Leaves 
narrowly cuneate, or oblong, obtuse, truncate, or 
3-5-toothed at the apex, 5-0” long, about 1” wide; 
heads very numerous, about 1” broad, densely glom- 
erate-spicate in a narrow virgate panicle, 2-5-flow- 
ered, I or 2 of the marginal ones pistillate, the others 
perfect and fertile; involucre short-oblong, canescent 
or tomentose, its bracts obtuse; receptacle naked. 
Kansas (according te Smyth) ; Colorado to Texas and 
Arizona. Aug.-Oct. 
4) 
22. Artemisia tridentata Nutt. Common 
Sage-bush. Sage-brush. Sage-wood. 
Mountain Sage. Fig. 4592. 
Artemisia tridentata Nutt. Trans. Am. Phil. Soc. 
(II) 7: 398. 1841. 
Shrubby, silvery-canescent ; stem much branch- 
ed, 1°-12° high. Leaves narrowly cuneate, 4’- 
14’ long, 1”-3” wide, sessile, 3-7-toothed at the 
truncate apex; heads very numerous, 5-8-flow- 
ered, about 14” broad, sessile, or very nearly so, 
in large dense panicles; involucre oblong, to- 
mentose, its inner bracts oblong, the outer short, 
ovate, all obtuse or obtusish; receptacle naked; 
flowers all perfect and fertile. 
On dry plains and in rocky soil, western Ne- 
braska to Colorado, Utah and California, north to 
Montana and British Columbia. July—Sept. 
23. Artemisia cana Pursh. Hoary Sage- 
bush. Fig. 4593. 
Artemisia cana Pursh, Fl. Am. Sept. 521. 1814. 
Shrubby, densely white-canescent ; stem much 
branched, 1°-24° high. Leaves linear, linear- 
oblong or narrowly lanceolate, sessile, acute 
at both ends, 1’-2’ long, 14’~3” wide, usually 
quite entire, rarely with 2 or 3 acute teeth or 
lobes; heads numerous, about 14” broad, glom- 
erate or sometimes solitary in the axils of 
the leaves, or crowded into a naked thyrsus 
at the summit, 5-9-flowered; involucre ob- 
long, canescent, its inner bracts oblong or lan- 
4 ceolate, obtuse, usually with 1-3 shorter outer 
| ones; receptacle naked; flowers all perfect and 
fertile. ; 
Plains, Nebraska and Colorado to North Da- 
kota, Montana and Saskatchewan. July—Sept. 
95. TUSSILAGO [Tourn.] L. Sp. Pl. 865. 1753. 
An acaulescent herb, more or less white-tomentose, with slender perennial rootstocks, 
broad basal cordate, dentate or lobed, long-petioled leaves, and large solitary, monoecious 
