COMPOSITE. 77 



on the spreading branches. Leaves lanceolate, acute at each 

 end, sharply serrate in the middle. Low grounds. 



14. A. simplex, Willd. Rays pale blue or whitish. Scales 

 of the involucre linear-awl-shaped. Stem stout, smooth or nearly 

 so, with numerous leafy branches. Heads medium -sized, some- 

 what corymbose. Leaves smooth, lanceolate, tapering at both 

 ends, the lower serrate. Moist and shady banks. 



15. A. tenuifolius, L. Rays pale blue or whitish. Scales 

 of the involucre linear-awl-shaped, with very slender points. 

 Heads medium-sized, in panicled racemes. Leaves long, narrowly 

 lanceolate, tapering to a long slender point, the lower usually 

 serrate in the middle. Stem much branched, pubescent in lines. 

 Low thickets. 



16. A. nemora'lis, Ait., is found in the eastern provinces an4 

 in Muskoka. Rays lilac-purple. Stem slender and leafy, the 

 upper branches terminating in 1 -flowered nearly naked peduncles. 

 Leaves rigid, narrowly lanceolate, nearly entire, ivith revolute 

 margins. 



17. A. ptarmicoi'des, Torr. and Gr. Rays 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. 



18. A. acuniina'tllS, Michx. Rays 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 in eastern Ontario. 



19. ERIG'ERON, L. FLEABANE. 



1. E. Canadense, L. (HORSE- WEED. BUTTER- WEED. ) Rays 

 white, but very inconspicuous, shorter than their tubes. Heads 

 very small, numerous, in panicled racemes. Stem 3-5 feet high, 

 erect and wand-like, bristly-hairy. Leaves linear, mostly entire. 

 Common in burnt woods and new clearings. 



2. E. bellidifo'lium, Muhl. (ROBIN'S PLANTAIN.) Rays&/m'sA- 

 purple, numerous. Heads medium -sized, few, on slender corym- 



