Erigeron Philadelphicum. 229 
branched, somewhat fibrous, and of a yellowish cast, The bratiches 
are pubescent. Radical leaves, ovate-lanceolate, on long petioles, 
and occasionally having one or two serratures. Upper leaves Jan- 
ceolate, entire sessile, and somewhat amplexicaule. Flowers nume- 
rous, erect, situated ona large diffuse pannicle. Calix hemispheri- 
cal. Florets of the ray capillary, whitish, or blue; sometimes 
purplish. It grows in the greatest profusion in all the fields near 
Philadelphia ; and it ranges extensively throughout the United States, 
in similar places. It begins to flower in July, and continues bloom- 
- ing through the month of August. It should be collected for me- 
dical use while in flower. 
VOL. I. 30 
