Artemisia ludoviciana subsp. ludoviciana

Artemisia pabularis (A. Nelson) Rydb. Bull. Torrey Club 33: 157. 1906.
Artemisia rhizomata pabularis A. Nelson, Bull. Torrey Club 27: 34. 1900.
A perennial, with a cespitose rootstock; stem slender, densely white-tomentose, 3-6 dm. high; leaves many, linear or lanceolate, 3-6 cm. long, 2-5 mm. wide, white-tomentose on both sides, the lower often dentate towards the apex; heads many in a leafy panicle; involucre campanulate, densely floccose, 3-3.5 mm. high and 2-2.5 mm. broad; bracts about 10, in 3-4 series; outer bracts lance-ovate, acute, half as long as the innermost; inner bracts elliptic or ovate; raj-flowers 4-6; corollas 1.5 mm. long; disk-flowers 10-15; corollas light-brown, 2 mm. long; achenes about 1 mm. long.
Type locality: Red Desert near Creston, Wyoming. Distribution: South Dakota, Nebraska, Colorado, and Wyoming.

Artemisia brittonii Rydb. Bull. Torrey Club 32: 129. 1905
A pereimial, with a horizontal rootstock; stem stout, 3-6 dm. high, white-floccose; lower leaves thick, cuneate or oblong-oblanceolate, 3-5 cm. long, with 3-5 short, lanceolate, often somewhat divergent lobes, mostly above the middle, white-tomentose on both sides; upper leaves ovate-lanceolate, 3-lobed or entire; heads numerous in a dense leafy panicle; involucre campanulate, densely floccose, about 3 mm. high and 2 mm. broad; bracts about 12, in 3-4 series, the outer ovate, acute, scarcely half as long as the innermost; inner bracts elliptic, obtuse; ray-flowers 8-10; corollas 1.5 mm. long; disk-flowers about 10; corollas 2 mm. long; achenes 1.5 mm. long.
Type locality: Golden, Colorado. Distribution: Wyoming to Oregon and Coahuila.

Artemisia lindheimeriana Scheele, Linnaea 22 : 163. 1849
Artemisia vulgaris americana Besser, Linnaea 15; 105, in part. 1841.
Artemisia cuneifolia Scheele, l^innaea 22: 162. 1849. Not A. cuneifoli a DC. 1837.
A perennial herb, with a rootstock; stem 3-10 dm. high, striate, sparingly floccose or in age glabrous, branched; lower leaves pinnatifid, with narrow linear divisions, 4-5 cm. long, slightly floccose but soon glabrate and green above, white-tomentose beneath; upper stemleaves entire, narrowly linear-lanceolate, those of the branches narrowly linear; heads very numerous in a branching panicle, mostly nodding; involucre campanulate, 3 mm. high, 2 mm. broad; bracts 10-12, in about 3 series, usually densely tomentose, the outer ovate and half as long as the innermost; inner bracts elliptic, obtuse; ray-flowers 5-7; corollas cylindric. 1.5 mm. long; disk-flowers 6-10; corollas yellow, 2 mm. long; achenes 1 mm. long. (Intermediate between A. ludoviciana and A. mexicana.)
Type locality : In the dry river bed of the Cibolo, fifteen miles west otNew Braunf els, Texas.
Distribution: Missouri and Oklahoma to Texas.

Artemisia cuneata Rydberg, sp. nov
A peremiial, with a creeping rootstock; stem 5-10 dm. high, tomentose, branched; leaves sessile, 2-4 cm. long, grayish-floccose above, white-tomentose beneath, those of the stem cuneate-obovate, pinnatifid, or coarsely toothed towards the apex, the lobes or teeth ovate, often mucronate, those of the inflorescence lanceolate and entire; heads numerous, very shortpeduncled or subsessile, hemispheric, about 3 mm. broad; bracts 10-12, straw-colored, oval, obtuse, tomentose, the inner scarious-margined; ray-flowers 6 or 7; corollas 1.5 nun. long, glandular-granuliferous; disk-flowers 6 or 7; corollas nearly 2 mm. long.
Type collected at Idaho Springs. Colorado, August 27, 1895, C. L. Shear 4617 (htrl.. N. Y. Bot. Card.).
Distribution: Texas to Colorado.

Artemisia pudica Rydb. Bull. Torrey Club 32: 130. 1905
A perennial, with a horizontal rootstock; stem 4-6 dm. high, simple up to the inflorescence, white floccose; leaves linear or narrowly lance-linear, 6-8 cm. long, 6-8 mm. wide, entire, white-floccosc on both sides; heads numerous, nodding, pedunclcd on the many long erect racemiform branches of the lax panicle; involucre broadly campanulate, about 5 mm. high, 4-5 mm. broad; bracts about 12, in 3 series, ovate, all acutish or the innermost obtusisb, densely floccose, the outer more than half as long as the innermost; ray-flowers about 12; corollas 1.5 mm. long; disk-flowers 25-30; corollas nearly 3 mm. long; achenes 1.5 mm. long.
Type locality: Gunnison, Colorado.
Distribution: Known only from the type locality.

Artemisia gnaphalodes Nutt. Gen. 2 : 143. 1818
Artemisia rhizomaia A. Nelson, Bull. Torrey Club 27: 34, in part. 1900.
A perermial, with a cespitose rootstock; stem 3-10 dm. high, white-tomentose, striate; leaves numerous, the lower oblanceolate, 5-10 cm. long, serrate towards the apex, tomentose on both sides, but usually less densely so and darker above, the upper linear and entire; heads very numerous in leafy panicles; involucre campanulate, 3-4 mm. high, 2-3 mm. broad, densely tomentose; bracts 10-12, in 3-4 series, the outer ovate, half as long as the innermost; inner bracts elliptic or oval, obtuse; ray-flowers 6-8; corollas 1.5 mm long; disk-flowers 10-15; corollas dark-brown or purplish, 2-2.5 mm. long; achenes 1 mm. long.
T'^'PE loc.-vlity; Dry savannas about Green Bay, Wisconsin.
Distribution: Michigan and Ontario to Saskatchewan, Colorado, and Missouri; introduced in New Hampshire and Massachusetts.

Artemisia rhizomata A. Nelson, Bull. Torrey Club 27: 34 1900.
A perennial, with a cespitose rootstock; stem 4-6 dm. high, simple, white-tomentose, terete; leaves white-tomentose on both sides, 2-4 cm. long, the lower elliptic, oblanceolatc, or oblong-cuneate, usually with 3-5 short ovate or lanceolate lobes, the upper lanceolate and entire; heads comparatively few in a narrow, spike-like panicle; branches of the latter short, with 2-6 erect heads; involucre campanulate, about 3.5 mm. high and 3 mm. broad, densely tomentose; bracts about 10, in 3 series, the outer ovate, half as long as the innermost; inner bracU elliptic, obtuse; ray-flowers 7 or 8; corollas nearly 1.5 mm. long; disk-flowers 7 or 8; corollas light-brown, 2 mm. long; achenes 1.5 ram. long.
Type locality: Sweet Water, Wyoming. Distribution: Wyoming to New Mexico.

Artemisia herriotii Rydb. Bull. Torrey Club 37: 455. 1910
A tall perennial herb, with a rootstock; stem simple, 6-10 dm. high, finely tomentose; leaves entire or sparingly and sharplj' toothed, 5-20 cm. long, 5-15 mm. wide, glabrate and green above, denseljwhite-tomentose beneath, rather thin, the teeth lanceolate and directed forward ; heads verjnumerous, erect, in a narrow dense panicle ; branches erect ; involucre oblong, 4—5 mm. high, 2.5-3 mm. broad; bracts 10-14, in 3-4 series, tomentose, the outer ovatelanceolate, acute, half as long as the innermost; inner bracts eUiptic, mostly obtuse; ray-flowers 6-8; corollas 2 mm. long; disk-flowers 5-7; corollas 2.5 mm. long; style-branches truncate, erose at the tips; achenes 1.5 mm. long, finely striate.
T-i-PE locality: Edmonton. Alberta.
Distribution: Alberta and Saskatchewan to South Dakota.

Artemisia diversifolia Rydb. Bull. Torrey Club 28: 20. 1901
Arletnisia gnaphalodes diversifolia A. Nelson; Coult, & Nels. Man. 569. 1909.
A perennial, with a horizontal rootstock; stem simple, white-tomentose, leafy, 3-10 dm. high; leaves densely tomentose on both sides, sessile, 5-10 cm. long, the lower pinnately cleft into 3-7 narrowly lanceolate, acuminate, rarely acute, lobes, which are directed forward, the upper or rarely aU entire, lance-linear, attenuate ; heads numerous, conglomerate and subsessile, in a narrow leafy panicle; involucre hemispheric or round-campanulate, 3-4 mm. high and about as broad; bracts about 10, densely floccose, in 3 series, the outer ovate, acute, fully half as long as the innermost; inner bracts oval, obtuse; ray-flowers about 10; corollas 1.5 mm long; disk-flowers about 10; corollas yellow, 2-2.5 mm. long; achenes about 1.5 mm. long.
Type locality: Priest River, Idaho.
Distribution: Northwestern Ontario Qames Bay) to British Columbia, California, and Colorado.