4. Artemisia Dracunculoides Pursh. Linear-Leaved Wormwood

Fig. 4574

A. dracunculoides Pursh, Fl. Am. Sept. 742. 1814.

Perennial, glabrous; stem somewhat woody, usually much branched, 2°-4° high, the branches nearly erect. Leaves linear, l'-31/2' long, 1"-2" wide, acute, entire, or the lower and basal ones sometimes 3-cleft or even more divided; heads very numerous, 1"-1 1/2" broad, nodding, very short-peduncled, racemose-paniculate; involucre nearly hemispheric, its bracts ovate or oblong, green, scarious-margined; receptacle hemispheric, naked; central flowers sterile.

Dry plains and prairies, Manitoba to British Columbia, Illinois, Missouri, Nebraska, Texas, Chihuahua, New Mexico and California. July-Nov.

5. Artemisia Glauca Pall. Silky Wormwood

Fig. 4575

A. glauca Pall.; Willd. Sp .Pl. 3: 1831. 1804. Ariemisia dracunculoides var. incana T. & G. Fl. N. A. 2: 416. 1843.

Perennial, similar to the preceding species; stems strict, leafy, usually simple or little branched, 1°-2° high, pubescent, tomentose or canescent, or glabrous below. Leaves linear, 1/2'-2 1/2' long, about 1" wide, entire, finely and densely pubescent, obtuse or obtusish, or the lower or sometimes nearly all of them 3-cleft into linear lobes, 1'-1 1/2' long; panicle narrow, branched, its branches nearly erect; heads drooping, sessile, very numerous, scarcely more than 1 1/2" long; involucre hemispheric, its bracts scarious-margined, obtuse; receptacle naked; central flowers sterile.

Minnesota to North Dakota, Manitoba and Saskatchewan. June-Sept.

6. Artemisia Filifolia Torr. Silvery Wormwood

Fig. 4576

Artemisia filifolia Torr. Ann. Lyc. N. Y. 2: 211. 1827.

Shrubby, finely silvery-canescent throughout; stem branched, 1°-3° high, the rigid branches nearly erect. Leaves 1'-2r long, nearly all 3-parted into filiform entire segments less than 1/2" wide, or the uppermost undivided; heads exceedingly numerous, about \" broad, racemose-paniculate, very short-peduncled, 3-5-flowered; involucre oblong, its bracts densely canescent; receptacle small, naked or slightly fimbrillate; central 1-3 flowers sterile.

On dry plains, Nebraska to Utah, Wyoming, Nevada, Texas, Mexico and Arizona. Wormwood-sage. July-Oct.

7. Artemisia Frigida Willd. Pasture Sage-Brush. Wormwood Sage

Fig. 4577

Artemisia frigida Willd. Sp. Pl. 3: 1838. 1804.

Perennial, woody at the base, densely silky-canes-cent all over; stem branched or simple, 10'-2o' high. Leaves 1/2'-1 1/2' long, ternately or 5-nately divided into numerous short acutish mostly entire lobes less than 1/2" wide, the lower and basal ones petioled, and often with a pair of entire or 3-cleft divisions near the base of the petiole, the upper sessile and less divided; heads rather numerous, racemose or racemose-paniculate, short-peduncled, nodding, about 2" broad; involucre hemispheric, its bracts oblong, canescent or tomentose; receptacle villous-pubescent; central flowers fertile.

On dry plains and in rocky soil, Minnesota to Saskatchewan, Yukon, Idaho, Nebraska, Texas and Arizona. Wild sage. July-Oct.