CLASS XIX. ORDER I. 315 



nal, pubescent. Flowers while. — Grows at Cambridgeport and 

 elsewhere in low ground. — August, September. — Perennial. 

 EuPATORiuM FUBEscENs. WUld. Hairy Eupatorium. 

 Leaves sessile, distinct, rough, veiny, the lower 

 ones doubly serrate, the upper ones subserrate, stem 

 panicled, pubescent, the branches fastigiate. WUld. 



Stem hairy, two feet high. Leaves opposite, sessile, ovate, 

 toothed, hairy. Upper leaves nearly entire, with a tooth or two 

 at base, alternate ? Branches of the corymb alternate ? Calyx 

 cylindrical, hairy ; florets about five. In a swamp at West Cam- 

 bridge. — July. 



As it agrees pretty well Avith the character above quoted from 

 Willdenow, I have assigned it to his species pubescens. The 

 upper leaves in my specimens are all alternate. Should this 

 character be found constant, it may deserve the name of alterni' 

 folium. 



* Eupatorium ovatum. Ovate Eupatorium. 



E. hirsutuin scabruni ; foUis opposiiis, sessilibus, 

 ovatis, obtuse, denial is ; corymbo fastiglato ; calycibus 

 sub-octojloris. 



Hairy, rough ; leaves opposite, sessile, ovate, ob- 

 tusely toothed ; corymb fastigiate, calyxes about eight 

 flowered. 



A stout, rough species, three or four feet high. Leaves per- 

 fectly ovate, the upper ones somewhat deltoid, all of them fur- 

 nished with simple, obtuse teeth, rough and veiny. Corymb 

 flat,' topped with white flowers. Calyx imbricated with hairy, 

 acute segments. Florets about seven or eight. — In low grounds 

 at Sudbury, twenty miles from Boston. — July, August. — Peren- 

 nial. 



Eupatorium perfoliatum. L. Thorough Wort., 



American Medical Botany, PI. ii. 



Leaves perfoliate-connate, downy. L. 

 Syn. Eupatorium connatum. Mx. 



