278 NORTH AMERICAN FLORA [VOLUME 34 
sessile, pinnately or bipinnately divided or cleft into linear or lanceolate or rarely broader 
often toothed divisions, sparingly floccose above when young, glabrate in age, white-tomen- 
tose beneath; heads usually in a simple spike- or raceme-like inflorescence, at first nodding; 
involucre hemispheric, 3-4 mm. high, 5-7 mm. broad; bracts 10-12, in 3 series, the outer 
linear-lanceolate, acute, shorter than the innermost; inner bracts oval, obtuse; ray-flowers 
10-12; corollas 1.5 mm. long; disk-flowers 15-30; corollas about 2 mm. long. 
TYPE LOCALITY: Rocky Mountains [Canadian]. 
DISTRIBUTION: Saskatchewan to British Columbia, Washington, Utah, and Colorado. 
94. Artemisia graveolens Rydb. Bull. Torrey Club 24: 296. 1897. 
Artemisia subglabra A. Nelson, Bull. Torrey Club 27: 36. 1900. 
A perennial, with a cespitose caudex or rootstock, sometimes suffruticose at the base; 
stems simple, 2-5 dm. high, striate, glabrous; leaves mostly bipinnatifid, with spreading, 
narrow, often toothed divisions, revolute-margined, glabrous on both sides or slightly and 
finely tomentulose beneath; heads numerous in a narrow spike-like panicle, nodding at least 
when young; involucre hemispheric, 3.5-4 mm. high, 4-6 mm. broad; bracts 10-12, in 3 series, 
glabrous, yellowish, the outer ovate, much shorter than the innermost; inner bracts oval, 
obtuse or acutish; ray-flowers about 10; corollas 1.5 mm. long; disk-flowers 20-50; corollas 
2 mm. long; achenes fully 1 mm. long. 
TYPE LocaLity: Long Baldy, Little Belt Mountains, Montana. 
DistTRIBUTION: Alberta and British Columbia to Oregon, Nevada, and Wyoming. 
95. Artemisia tenuis Rydb. Mem. N. Y. Bot. Gard. 1: 431. 1900. 
Artemisia tenuis integerrima Rydb. Mem. N. Y. Bot. Gard. 1: 431. 1900. 
A perennial, with a cespitose rootstock, sometimes somewhat suffruticose at the base; 
stems slender, glabrous or minutely puberulent, branched; leaves 2-4 cm. long, green and 
glabrous above, slightly tomentulose beneath, deeply pinnatifid or bipinnatifid into linear, 
diverging, revolute-margined segments; heads in a lax narrow panicle with short raceme-like 
branches, peduncled, erect; involucre campanulate, about 4 mm. high, 2-3 mm. broad; bracts 
7-8, in 3 series, glabrous, light-brown, the outer lanceolate, half as long as the innermost; 
inner bracts oval, obtuse; ray-flowers 3-5; corollas 1.5 mm. long; disk-flowers 8-15; corollas 
2 mm. long; achenes 1 mm. long. 
TYPE LocaLity: Emigrant Gulch, Montana. 
DistR1IBUTION: Montana and northern Wyoming; (Nevada?). 
96. Artemisia redolens A. Gray, Proc. Am. Acad. 21: 393. 1886. 
A perennial, with a thick root and short caudex; stems 4-6 dm. high, somewhat tomen- 
tose; lower leaves once or twice pinnately 3—5-cleft into linear or lanceolate divisions, some- 
what silky but green above, finely and sparingly tomentulose beneath, or those of the basal 
shoots more densely pubescent and white beneath; leaves of the branches linear and entire; 
heads numerous in an open, loose, leafy panicle; involucre 3.5 mm. high, 3 mm. broad; 
bracts 10-12, in 3-4 series, sparingly silky-tomentose or nearly glabrous, the outer lanceolate, 
half as long as the innermost; inner bracts elliptic, acutish; ray-flowers about 10; corollas 1.5 
mun. long; disk-flowers 4 or 5; corollas 2 mm. long; achenes 1 mm. long, striate. (In the orig- 
inal description referred to the section Dracunculus, but evidently erroneously so.) 
TypPE Locality: Chihuahua on cool slopes under cliffs [rocky hills near the city]. 
DistRIBUTION: Chihuahua and Durango. 
XIV. Wrightianae. Perennial herbs, somewhat suffruticose at the base. Leaves pinnately 
dissected into linear-filiform or narrowly linear, revolute, spreading divisions, tomentose on 
the lower or on both surfaces. Heads small, in dense leafy panicles; involucre campanulate, 
2-3 mm. broad. Corolias glandular-granuliferous, those of the ray-flowers nearly cylindric, 
2-toothed, those of the disk-flowers trumpet-shaped, 5-toothed. Style of the former long- 
exserted, with linear-filiform branches, that of the latter included or barely equalling the 
corolla, with short recurved branches truncate and erose at the apex. 
