COMPOSITE. 121 



\ a.-J. TUSSILA'GO, Tourn. Cnr/rSFOOT. 



■ T. Far'fara, L. Wet places, chiefly eastward, but also 

 in Ontario. 



3G^ PETASI'TES, Tourn. Sweet Coltsfoot. 



1. P. palma'ta. Gray. Leaves rounded, somewhat kid- 

 ney-shaped, palmately 5-7-lobed, the lobes toothed and cut. 

 — Cedar-swamps and bogs ; -wet banks of streams. 



2. P. sagitta'ta. Gray. Leaves deltoid-oblong to rehi- 

 form-hastate, repand-dentate. — Swamps, N.W. 



87. ASTER, L. Staewokt. Astee. 

 * Leaves^ at least the lower ones^Jteart-sJtaped and pefioled. 



1.- A. eorymbo'SUS, Ait. Bays 6-9, white or nearly so. 

 Heads in corymbs. Stems slender, 1-2 feet high, zigzag. 

 Leaves,thin, sraoothish, sharp-pointed, coarsely \serrate, all 

 the lower ones on slender naked petioles. — Woodlands. 



2. A. ma'crophyl'lus, L. Bays white or bluish. Stem 

 stout, 2-3 feet high. Leaves tMckish, rough, finely serrate, 

 the lower long-petioled. Heads in closer corymbs than in 

 No. 1. — Woodlands. 



3. A. azu'reus, Lindl. Bays 10-20, bright blue. Heads 

 raoemed or paniclsd. Stem roughish, erect, racemose-com- 

 pound above. Leaves entire or nearly so, rough ; the lower 

 ovate-lanceolate, on long petioles ; the upper lanceolate or 

 linear, sessile. The latest flowering of our Asters. — Dry soil. 



4. A. unduIa'tUS, L. /Bays bright blue. Heads raoemed 

 or panicled. Stem hoary with close pubescence, si^roading. 

 Leaves with somewhat wavy margins, entire or nearly so, 

 ovate or ovate-lanceolate, roughish above, downy beneath ; 

 the lowest cordate, on margined petioles ; the upper with 

 winged short petioles clasping at the base, or sessile. — Dry 

 woods. 



5. A. eOPdifo'liUS, L. Bays pale blue or nearly white. 

 Heads small, profuse, panicled. Stem much branched. 

 Leaves thin, sharply serrate, the lower on slender ciliate 



