COMPOSIT.E. 184 EUPATORIFM. 



* Involucre 3 — 5-flowered. 



1. E. SESSILIFO'LIUM. 



Leaves opposite, sessile, distinct, amplexicaul, ovate-lanceolate, rounded at 

 the base, very smooth, serrate ; s^e/re smooth. Plants — 4 feet high, in rocky 

 woods. Stem slender, erect, branching at top into a corymb with white 

 flowers. Leaves large, tapering regularly from the somewhat truncate base 

 to a long point, with small serratures, paler beneath. Flower stalks downy. 

 Heads 5-flowered, witii twice as many scales in tv/o rows. Sept. 



Sessile-leaved Eupalorium. 



2. E. TEUCRIFOLIUM. IVilld. E. pubescens. Bw. 



Leaves opposite, sessile, distinct, ovate, rough, veiny, the lower ones doubly 

 serrate, the upper ones snbserrate or entire ; stem paniculate, pubescent, with 

 fastigiate, corymbose branches above. Plant hairy, 2 — 3 feet high, with a 

 somewhat panicled corymb of white flowers. The upper leaves are often en- 

 tire. Involucre .5-flowered, with twice as many scales in two rows. Scarcely 

 distinct from E. sessiliflorum. Aug. Hairy Eujjatoiium. 



3. E. HYSSIPIFO'HUM. 



Leaves opposite (the upper ones alternate), often verticillate, linear-lanceo- 

 late, triple-nerved, punctate, lower ones subserrate, upper ones entire. A 

 more delicate species, smooth in all its parts, or minutely pubescent, in dry 

 fields. Stem about 2 feet high, branching, witli numerous narrow leaves, 

 which are mostly opposite, and a spreading corymb at the summit. Heads 

 5-flovvered. Outer scales shortest, the others shorter than the purplish flow- 

 ers. Aug. Sept. J\~arruw-leaved. Eupalorium, 



4. E. rotundifo'lium. 



Leaves opposite, sessile, distinct, roundish ovate, subcordate at base, 3-nerv- 

 ed, veiny, coarsely serrate •, ijiner scales of the involucre acuminate, as loner 

 as the flowers. A slender species, with large leaves, found in dry fields. 

 Heads fastigiate-corymbed, each with 5 purplish flowers. Aug. Sept. 



Ilound-lcaved Eupatorium. 



* * Involucre more than 5-flowered. 



5. JCj. PURPU'REUM. L. E. purpureura, verticillatum,maculalum, &c. of authors 



Leaves verticillate, in 4s or 5s, ovate-lanceolate, acuminate, serrate, petio- 

 Jate, veiny, minutel}' punctate, rugose and somewhat rough; stnn fistulous 

 This is a tall plant, conspicuous for its large, pale purple corymbs, about 

 thickets and low grounds. Stem 5 or G feet high, hollow in various degrees, 

 whence it is called trumpet-weed. It terminates above in a large fastigiate 

 corymb. Each involucre consists of about 8 — 15 leaves, and contains about 8 

 flowers, with very long styles. Aug. Sept. Purple Eupatorium. 



/3. vertir.'llatum, leaves verticillate, in 3s or 4s, acuminate at each end, un- 

 equalh' serrate, nearly smooth; stem nearly or quite solid, smooth. A tall 

 plant with the general asi)ect of the preceding, found in wet woods. Stem 

 slender, round, 4 feet high, with a large terminal corymb, and smaller axillary 

 ones. Leaves in whnrls of about 4. large, tapering from the middle to both 

 ends. Scales whitish, corollas purple. 



y. ovatum, leaves raiher ovate than lanceolate, and the stem rather taller. 

 2. 7niiciilatum, leaves jtuhcsccnthenoaih; stem pubescent, furrowed, punc- 

 tate with oblong purple spots. Tall like the foregoing, found in low grounds. 



