Parr 3, 1916] CARDUACEAE: ANTHEMIDEAE 283 
111. Artemisia spiciformis Osterhout, Bull. Torrey Club 27: 507. 
1900. 
Artemisia spiciformis longiloba Osterhout, Muhlenbergia 4: 69. 1908. 
A shrub, about 5 dm. high; bark grayish; leaves narrowly cuneate or oblanceolate, 2—3.5 
em. long, petioled, irregularly 3—5-toothed at the apex, or sometimes 3-fid with toothed divi- 
sions, cinerous-canescent; heads comparatively few in a racemose inflorescence; involucre 
turbinate, 5-6 mm. high, 3-4 mm. broad; bracts about 15, imbricate in 4 series, somewhat 
floccose, one or two of the outer more or less foliaceous, lanceolate, acute, the rest ovate, acute, 
half as long as the innermost; inner bracts elliptic, scarious with a green midrib, obtuse or 
acutish; flowers about 12; corollas trumpet-shaped, nearly glabrous, fully 3 mm. long; style 
slightly exserted; achenes about 2 mm. long. 
Type Locatity: North Park, Colorado. 
Distrisution: Colorado and Utah. 
112. Artemisia Vaseyana Rydberg, sp. nov. 
A shrub, 5 dm. high or more; bark yellowish or brown; leaves narrowly cuneate, 3-5- 
dentate at the apex, 1-3 cm. long, canescent, rather conspicuously triple-veined; heads many 
in a narrow panicle, with erect short branches; involucre broadly campanulate, 5 mm. high, 
3-4 mm. broad; bracts about 12, in about 4 series, canescent, the outer ones broadly ovate, 
less than half as long as the innermost; inner bracts broadly elliptic, obtuse, scarious with a green 
midrib; flowers 5-8; corollas trumpet-shaped, 3 mm. long, sparingly glandular-granuliferous; 
style barely equaling the corolla; achenes nearly 2 mm. long. 
Type collected in the state of Washington in 1889, G. R. Vasey 480 (herb. N. Y. Bot. Gard.). 
DISTRIBUTION: Washington, Oregon, and western Nevada. 
113. Artemisia tridentata Nutt. Trans. Am. Phil. Soc. II. 7: 398. 
1841. 
A shrub, 5-50 dm. high, much branched, with straw-colored bark; leaves canescent, 1-4 
_em. long, narrowly cuneate, obtusely 3-toothed (rarely 4-7-toothed) at the apex, or the upper- 
most entire, linear or oblanceolate; heads numerous, sessile, clustered in dense leafy panicles; 
involucre campanulate, 3-4 mm. high, about 2 mm. broad; bracts about 15, in 4-5 series, 
imbricate, canéscent, the outermost short, thick, ovate, acute, less than a fourth as long as 
the innermost; inner bracts oblong, obtuse, thinner with scarious margins; flowers 4-8; corollas 
trumpet-shaped, 5-toothed, 2.5-3 mm. long; tube densely glandular-granuliferous, equaling 
the almost glabrous throat; style equaling the corolla; achenes about 1.5 mm. long. 
Type Loca.ity: Plains of the Oregon [Columbia River]. 
Distrmution: South Dakota and Montana to British Columbia, Lower California, and New 
Mexico. 
Intusrrations: Britt. & Brown, Ill. Fl. f. 4017; ed. 2. f. 4592. 
114. Artemisia angusta Rydberg, sp. nov. 
Artemisia tridentata angustifolia A. Gray, Proc. Am. Acad. 19: 49. 1883. 
A shrub, 10-12 dm. high, with erect branches; bark straw-colored; leaves canescent, 2-4 
cm. long, 1-4 mm. wide, linear and entire, or linear-cuneate and merely 3-toothed at the 
apex; heads numerous, sessile, clustered in leafy panicles; involucre canescent, 3.5-4 mm. 
high, 2 mm, broad; bracts 12-15, imbricate in 4-5 series, the outer thick, ovate, less than one 
fourth as long as the innermost; inner bracts oblong, obtuse, scarious-margined; flowers 4-6; 
corollas trumpet-shaped, about 2 mm. long, glandular-granuliferous; achenes 1.5 mm. long. 
Tyre LocaLity: South Idaho. r 
Distriution: Washington, Oregon, Idaho, Nevada, and northern California, 
