466 



COMPOSITAE. 



[Vol. III. 



Artemisia vulgaris L. 



Common Mugwort. (Fig. 4010. ) 



Artemisia vulgaris L. Sp. PI. 848. 1753. 



Perennial; stem glabrous or nearly so, much 

 branched, 1°-},%° high. Leaves i'-^]z' long, 

 deeply pinnatifid, into linear, oblong or some- 

 what spatulate, pinnatifid, toothed or entire 

 lobes, densely white- tomentose beneath, dark 

 green and glabrous above, the lower petioled 

 and often with i or 2 pairs of small lateral divis- 

 ions at or'near the base of the petiole, the upper 

 sessile, the uppermost sometimes linear and en- 

 tire; heads numerous, erect, about 2" broad, in 

 panicled simple or compound spikes; involucre 

 oblongcampauulate, its bracts oblong, obtusish, 

 scarious-margined, tomentose or glabrous; re- 

 ceptacle naked; central flowers fertile. 



In waste places. Nova Scotia to Ontario, Michi- 

 gan, New Jersey and Pennsylvania. Naturalized 

 from Europe. Native also of Asia. Reported as 

 native in arctic America. Called also Motherwort, 

 Fellon-herb, Sailor's Tobacco, Wormwood, Bul- 

 wand. July-Oct. 



14. Artemisia Pontica L 



Artemisia Pontica L. Sp. PI. S47. 



Perennial; stem branched, glabrous or canescent, 

 i°-3°high. Leaves I'/i'-iyi' long, 2-3-pinnately 

 dissected into short narrow lobes less than 1" wide, 

 canescent on both sides, or tomentose beneath, the 

 lower petioled and the petioles somewhat clasping 

 or auricled at the base, the upper mostly linear and 

 entire; heads numerous, i"-2" broad, drooping, 

 slender-peduncled; involucre hemispheric, canes- 

 cent, its bracts oblong or obovate, obtuse, the outer 

 short, lanceolate; receptacle glabrous; central 

 flowers fertile. 



Railway embankment near Tumble Station, Hunt- 

 erdon Co., N. J. ; mountain-side near Lily Lake, Lu- 

 zerne Co., Pa. Both specimens in leaf only, and re- 

 ferred to this species with some hesitation. Fugitive 

 or adventive from central Europe. July-Aug. 



Roman or Hungarian Wormwood. (Fig. 40ii.)- 



1753- 



15. Artemisia Kansana Britton. Kansas- 

 Mugwort. (Fig. 4012.) 



y Densely white-woolly all over; stem erect, much 

 \// branched, the branches strict, bearing very numerous 

 ^ small heads forming a narrow dense panicle. Leaves 

 numerous, crowded, the lower pinnately divided iuto 

 3-7 narrowly linear revolute-margined segments /^" 

 wide or less, greenish above; upper leaves mostly 

 narrowly linear and entire; heads oblong-oval, ses- 

 sile, or very short-peduncled, erect, or somewhat 

 spreading, lYz" long; involucre very woolly, its bracts 

 ovate-lanceolate to oblong-lanceolate, acute; recep- 

 tacle naked. 



Plains, Lane Co., Kansas, Aug. 15, 1895 (.\. S. Hitch- 

 cock). 



