322 CLASS XIX. ORDER II. 



ray. Receptacle naked, dotted. — Dry fields, Cambridge. — Pe- 

 rennial. 

 * Erh;eron integrifolium. Entire leaved Erigeron. 



E. caule simpllci, folloso, glabra ; foliis lanceolatis, 

 itileg-ris, trinervlbus ; Jioribus corymbosis ; calyce 

 hemisp/iccrico, sqiiatnis aciitis. 



Stem simple, leafy, smooth ; leaves lanceolate, en- 

 tire, three nerved : flowers corymbed ; calyx hemis- 

 pherical, with acute scales. 



Stem two feet high, simple, furrowed with a barely percepti- 

 ble pubescence. Leaves lanceolate, slightly clasping, three 

 nerved, entire with rarely a tooth or two in the lower ones, 

 pubescent. Peduncles somewhat leafy, branched, furrowed, 

 rough. Calyx hemispherical, flattened, the leafets acute, ap- 

 pressed. Ray crowded, white. — Sides of roads and woods. — 

 June to August. — Perennial. 



Ekigeron strigosum. ^Villd. Hairy Erigeron. 



Hairy or bristly, leaves lanceolate, with a few 

 large teeth in the middle or entire ; flowers in a pan- 

 icled corymb. 



Stems erect, channelled, hairy, with loose scattered bristles. 

 Leaves sessile, lanceolate, with remote teeth and scattered hairs. 

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

 spherical ; leafets pilose with long flaccid points. Ray capillary, 

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

 fences. — July, 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 



