GENUS 94. 



THISTLE FAMILY 



12. Artemisia Stelleriana Bess. 

 Wormwood. Fig. 4582. 



Beach 



Artemisia Sielleriana Bess. Abrot. 79. pi. 5. 1829. 



Perennial, densely white-tomentose ; stem branch- 

 ed, i-2i high, bushy, the branches ascending. 

 Leaves obovate to spatulate, i'-4' long, pinnatifid 

 into oblong, obtuse, entire or few-toothed lobes, 

 the lower petioled, the upper sessile, all densely 

 tomentose beneath, but becoming green and gla- 

 brous above when old ; heads racemose-spicate or 

 racemose-glomerate, 3"-4" broad, not drooping; 

 involucre oblong-campanulate, its bracts tomen- 

 tose, lanceolate or oblong-lanceolate ; receptacle 

 naked; central flowers fertile. 



Sandy sea-beaches, Quebec to New Jersey ; Oneida 

 Lake, N. Y. Cultivated in gardens along the coast. 

 Native of northeastern Asia. Occurs also on the 

 coast of Sweden. Foliage similar to that of the dusty 

 miller, Cineraria maritima L. July-Aug. 



Motherwort. 



native of arctic America. 

 Green ginger. July-Oct. 



Artemisia elatior (T. & G.) Rydb., a northwestern 

 species, with elongated acuminate leaf-lobes, ranges 

 eastward to Hudson Bay. 



13. Artemisia vulgaris L. Common Mug- 

 wort. Fig. 4583. 



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



Perennial; stem glabrous or nearly so, much 

 branched, i-3$ high. Leaves \'-$.' long, deeply 

 pinnatifid, into linear, oblong or somewhat spatu- 

 late, 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 divisions at or near the 

 base of the petiole, the upper sessile, the upper- 

 most sometimes linear and entire; heads numer- 

 ous, erect, about 2" broad, in panicled, simple or 

 compound spikes ; involucre oblong-campanulate, 

 its bracts oblong, obtusish, scarious-margined, 

 tomentose or glabrous; receptacle naked; central 

 flowers fertile. 



In waste places, Nova Scotia to Ontario, Michigan, 

 New Jersey, Pennsylvania and Georgia. Naturalized 

 from Europe. Native also of Asia. Reported as 

 Fellon-herb. Sailor's-tobacco. Wormwood. Bulwand. 



14. Artemisia pontica L. 



garian Wormwood. 



Roman or Hun- 

 Fig. 4584. 



Artemisia pontica L. Sp. PI. 847. 1753. 



Perennial ; stem branched, glabrous or canescent, 

 i-3 high. Leaves ii'-2i' long, 2-3-pinnately dis- 

 sected into short narrow lobes less than i" 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 flow- 

 ers fertile. 



Waste grounds, Massachusetts, New Jersey, Pennsyl- 

 vania, Ohio and Colorado. Fugitive or adventive from 

 central Europe. July-Aug. 



