Class XIX. Order II. S03 



Flowers on leafy, branched, hairy peduncles. Calyx flat-hemis- 

 pherical ; leafets pilose with long flaccid points. Hay capillary, 

 longer than in the last species, white. About woods and 

 fences. J uly, August. Perennial. 



ERIGERON PHILADELPHICUM. L. Philadelphia Flea Bane. 

 Stem many flowered ; leaves lanceolate, subserrate, 

 those of the stem half clasping ; florets of the ray 

 capillary, as long as the disc. L. 



Stem erect, two or three feet high, much branched at top, 

 the branches somewhat downy. Leaves lanceolate or oblong, 

 sessile and partly clasping, the lower ones toothed. Flowers 

 numerous, panicled, erect. Calyx flattened or hemispherical. 

 Florets of the margin very numerous and fine, pale blue or 

 purplish. Road sides, flowering in July and August. Peren- 

 nial. 



Fubgenus CJENOTUS. Calyx oblong ; ray minute ; down 

 simple. 

 ERIGERON CANADENSE L. Annual Flea-Bane. 



Stem hairy ; flowers panicled ; leaves lanceolate, 



lower ones serrate. Sm. 



One of the most hardy and common annual weeds. It propa- 

 gates itself rapidly, and since the discovery of America, has 

 been introduced, and spread through most countries in Europe. 

 Stem erect, furrowed, very hairy, branching. Leaves linear- 

 lanceolate, edges rough and ciliate. Flowers small, of no 

 beauty, very numerous, arranged in a sort of racemes on the 

 branches. Calyxes cylindrical, longer than they are wide, 

 somewhat imbricate. Ray very short and obscure, white, 

 crowded, erect. In pastures, road sides, and cultivated grounds, 

 varying in height from one to four feet, according to the soil. 

 August. 



321. SOLID AGO.* 



SOLID AGO LANCEOLATA. L. Fpear leaved Golden Rod, 



Stem glabrous, branching ; leaves lance-linear, en- 



* This genus is exceedingly abundant in the United States, and with the 

 genus Aster predominates in August and September over all other vegetables^ 



