466 



COMPOSITAE. 



[Vol. III. 



13. Artemisia vulgaris !,. 



Common Mugwort. (Fig. 4010.) 



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



Perennial; stem glabrous or nearly so, much 

 branched, i-3^ high. Leaves i'-aYz' 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 1 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 i ,f broad, in 

 panicled simple or compound spikes; involucre 

 oblong- campanulate, 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 I_. Sp. PI. 847. 1753. 



Perennial; stem branched, glabrous or canescent, 

 i-3high. Leaves \Yz , -2Yz / long, 2-3-pinnately 

 dissected into short narrow lobes less thani // 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. 401 1.) 



15. Artemisia Kansana Britton. Kansas 

 Mugwort. (Fig. 4012.) 



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 into 

 3-7 narrowly linear revolute-margined segments Yz fr 

 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, i^ // long; involucre very woolly, its bracts 

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

 tacle naked. 



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

 cock). 



