124 COMMON CANADIAN WILD PLANTS. 



racemes on the spreading branches. Leaves lanceolate, 

 acute at each end, sharply serrate in the middle. Low 

 grounds. 



17. A. panieula'tUS, Lam. (A. simplex, Willd.) Bays 

 pale blue or whitish. Scales of the involucre linear-awl- 

 shaped. Stem stout, smooth or nearly so, with numerous 

 leafy branches. Heads medium-sized, scattered, loosely 

 paniculate. Leaves smooth, oblong to lanceolate, tapering 

 at both ends, the lower serrate. Moist and shady banks. 



18. A. jun'eeus, Ait. Bays light purple. Stem slender, 

 1-3 feet high, simple, with few small heads, or loosely 

 branching. Leaves narrow, entire, or the lower sparingly 

 denticulate. Scales of the involucre small, narrow, in 2 or 

 3 rows. Bogs and wet places. 



19. A. vimin'eus, Lam. Bays white or nearly so. Stem 

 2-5 feet high, smooth, bushy. Leaves linear or narrowly 

 lanceolate, the larger ones sparingly serrate in the middle 

 with fine teeth. Heads very numerous, in 1-sided racemes 

 on short branchlets. Scales of the involucre narrowly 

 linear, in 3 or 4 rows. Moist banks. 



20. A. nemora'lis, Ait. Bays lilac-purple, elongated. 

 Stem slender and leafy, the upper branches terminating in 

 1-nowered nearly naked peduncles. Leaves small, rigid, 

 narrowly lanceolate, nearly entire, with revolute margins. 

 Swamps, Atl. Prov. and Muskoka. 



21. A. ptarmieoi'des, Torr. and Gr. Bays pure white. 

 Stems clustered, generally a foot high, each bearing a flat 

 corymb of small heads. Leaves linear-lanceolate, acute, 

 rigid, entire, mostly 1-nerved, with rough margins. Dry or 

 gravelly hills. Our earliest Aster. 



22. A. aeumina'tus, Michx. Bays white or faintly 

 purple. Stem about a foot high, somewhat hairy, zigzag, 

 panicled-corymbose at the top. Leaves large, thin, oblong- 

 lanceolate, pointed, coarsely toothed towards the apex, entire 

 at the base. Cool sandy woods ; mostly eastward. 



23. A. umbella'tUS, Mill. (Diplopappus umbellatus, Torr. 

 and Gr.) Pappus double, the inner of long capillary bristles, 



