VO COMMON CANADIAN WILD PLANTS. 



f * Upper leaves all sessile or clasping by a heart-shaped base ; lower ones 

 not heart-shaped. 



7. A. ISBVis, L. Rays large, purple or blue. Very smooth 

 throughout. Heads in a close panicle. Leaves lanceolate or 

 ovate-lanceolate, chiefly entire, rough on the margins, the upper 

 ones clasping by an aurided base. Dry woods. 



8. A. NOV36- An'glise, L. Rays many, narrow, violet-purple ; 

 heads large. Involucre of many slender equal scales, apparently in 

 a xingle row, clammy. Stem stout, 3-8 feet high, hairy, corymbed 

 above. Leaves very numerous, lanceolate, entire, clasping by an 

 auricled base, pubescent. River-banks and borders of woods. 



9. A. puni'ceus, L. Hays long, lilac-blue. Scales of the invo- 

 lucre narroivly linear, loose. Stem 3-G feet high, stout, rough- 

 hairy, usually purple beloiv. Leaves oblong-lanceolate, clasping 

 by an auricled base, sparingly serrate in the middle, rough above, 

 smooth beneath, pointed. Swamps ; usually clustered. 



10. A. longifo'lius, Lam. Rays large, numerous, purplish- 

 blue. Scales of the involucre in several rows, linear, ivith awl- 

 shaped spreading green tips. Stem smooth. Leaves lanceolate or 

 linear, taper-pointed, shining above. Heads solitary or few on 

 the branchlets. Moist thickets along streams. 



* * * None of the leaves heart-shaped; those of the stem sessile, tapering at the 

 base (except in ^Vo. 11). 



11. A. multiflo'rus, Ait. Rays white. Stem pale or hoary 

 with minute pubescence, 1 foot high, bushy. Leaves crowded, 

 linear, with rough margins ; the upper partly clasping. Heads 

 crowded on the racemose branches. Scales of the involucre with 

 spreading green tips. Dry soil. 



12. A. Tradescan'ti, L. Rays white or whitish. Scales of 

 the involucre narrowly linear, in 3 or 4 rows. Heads small, very 

 numerous, in 1 -sided close racemes on the branches. Stem 2-4 

 feet high, bushy, smooth. Leaves linear-lanceolate, the larger 

 ones with a few remote teeth in the middle. Moist banks. 



13. A. miser, L. (A. diffasus, Hook., in Macoun's Catalogue.) 

 Rays pale blue or whitish. Involucre nearly as in No. 12. Stem 

 more or less hairy, much branched. Heads small, ia loose raceni.- 



