112 COMMON CANADIAN WILD PLANTS. 



2. T. Huronen'se, Nutt. Hairy when young. Heads 

 usually few, and much larger than in T. vulgare. Pistillate 

 fimoers flattened, instead of terete as in T. vulgaie. — River- 

 margins, Atl. Prov. 



10. ARTEIHIS'IA, L. Wormwood. 



1. A. Canadensis, Michx. Stem smooth or sometimes 

 hoary with silky down, erect, usually brownish. Lower leaves 

 twice-pinnatifid, the lobes linear. — Shores of the Great Lakes. 



2. A. cauda'ta, Michx., has the lobes of the dissected 

 leaves filiform, and the heads smaH, in a wand-like long 

 panicle. Disk-flowers perfect hut sterile ; marginal florets 

 fertile.— Atl. Prov. and.]Sr.W. 



3. A. draeuneuloi'des, Pursh. Glabrous or slightly 

 hoary. Stems 2-4 feet high, branching. Leaves mostly 

 entire, linear, sometimes 3-cleft. Heads very numerous, in 

 a compound panicle. — N.W. plains. 



4. A. glau'ca, Pall. A smaller plant than the last, of stricter 

 aspect. Leaves linear to oblong-lanceolate. — N.W. plains. 



5. A. vulgra'ris, L. (Common Mua wort.) Stem tallf and 

 branching above. Leaves green and smooth above, white- 

 woolly beneath, pinnatifid, the lobes linear-lanceolate. 

 Heads small, erect, in panicles. Elowers purplish. — Old 

 fields near dwellings. 



6. A. LudOVieia'na, Nutt. White-woolly throughout. 

 Leaves lanceolate, the upper entire, the lower lobed or 

 toothed, the upper surface sometimes green and snioothiah. 

 Heads small, mostly sessile in narrow panicles. — N.W. 



Var. gnaphalo'des, Torr. and Gr., has the leaves 

 serrate at the tips. — N.W. 



7. A. bien'nls, Willd. Glabroiis; stem strict, 1-3 feet high. 

 Leaves once- or twice-pinnately parted, the lobes linear, 

 acute. Heads in very short axillary spikes or clusters, 

 crowded in a narrow leafy panicle. Florets all fertile. — 

 N.W., and spreading through the Eastern Provinces. 



