786 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Herbs, at most woody only at the base; leaves 
various, more or less tomentose. 
Involucres glabrous, at least in age; lower 
leaves bipinnate................. 16. A. fransertoides. 
Involucres densely tomentose, at least 
when young; lower leaves toothed 
or pinnatifid. 
Lower leaves merely coarsely toothed 
or lobed, the teeth or lobes short, 
the upper leaves entire; plants 
permanently white - tomentose 
throughout. 
Leaves glabrous or glabrate on the 
upper surface. ............... 17. A. silvicola. 
Leaves permanently tomentose on 
the upper surface. 
Panicles strict; plants stout, strict; 
heads 3 to 4 mm. wide...... 18. A. rhizomata. 
Panicles lax, spreading; plants 
slender, much branched 
above; heads about 2 mm. 
Wide.............22222-200- 19. A. albula. 
At least the lower leaves pinnatifid 
with long, filiform to lanceolate 
segments; pubescence various. 
Divisions of the leaves filiform; 
variously pubescent. 
Leaves permanently white-to- 
mentose...........-...-...20. A. kansana. 
Leaves glabrate above in age....21. A. wrightii. 
Divisions of the leaves broader, 
oblong - linear to lanceolate, 
never filiform, glabrate above. 
All leaves divided, the segments 
narrowly oblong-linear......22. A. redolens. 
Upper leaves lanceolate, undi- 
vided, the segments of the 
lower leaves oblong-lanceo- 
late... 2... eee eee ee eee ee ee 23. A. mexicana. 
1. Artemisia biennis Willd. Sp. Pl. 3: 1842. 1804. 
TYPE LocALity: ‘‘Nova Zelandia?” 
Rance: British America to California, New Mexico, and Pennsylvania. 
New Mexico: Shiprock; Dulce; Castle Rock. Wet ground, in the Upper Sonoran 
and Transition zones. 
2. Artemisia caudata Michx. Fl. Bor. Amer. 2: 129. 1803. 
Type Loca.ity: ‘‘Hab. ad ripas sabulosas fluminis Missouri.’’ 
RANGE: Manitoba and Vermont to New Mexico, Texas, and the Atlantic coast. 
New Mexico: Nara Visa (Fisher 174). Upper Sonoran Zone. 
3. Artemisia cana Pursh, Fl. Amer. Sept. 521. 1814. 
TYPE LocALITy: ‘‘On the Missouri.”’ 
RanGE: Rocky Mountain Region, south to northern New Mexico. 
New Mexico: Dulce (Stendley 8082). Plains and valleys, in the Upper Sonoran 
and Transition zones. 
