314 CLASS XIX. ORDER I. 



336. MIKANIA. 

 MiKANiA scANDENs. WUld. CUirihing 3Iikania. 



Stem climbing, glabrous ; leaves heart shaped, re- 

 pand toothed, acuminate, the lobes divaricate, une- 

 qual; flowers corymbed. WUld. 

 Syn. EuPATORiuM scandens. Mich. 



Stem twining, smooth. Leaves opposite, on long petioles, 

 glabrous, somewhat triangular or halberd shaped, their lower 

 half toothed, the upper tapering into a long, even, and very acute 

 point. Branches opposite, axillary, bearing small, terminal 

 corymbs. Flowers purplish white. Calyx with about four 

 leaves, and as many florets. — Wet places. — August, September. 

 — Perennial. 



337. EUPATORIUM. 

 EuPATORiuM sESsiFOLiuM. L. SessUc httved Eupatoriutti. 

 Leaves sessile, clasping, distinct, ovate-lanceolate, 

 rounded at base, serrate, smooth ; stem smooth. WUld. 



An erect plant with corymbed flowers, as are all the subse- 

 quent species. Stem slender, smooth. Leaves opposite, closely 

 sessile, circular at base, tapering to a very long, acute point, fur- 

 nished with small teeth or serratures, and paler underneath. Pe- 

 duncles downy. Flowers white, in a terminal corymb. Calyx 

 containing about five florets. — Found in the woods atRoxbury. — 

 August. — Perennial. 



EuPATORiuM Verben^efolium. Micli. Vervain leaved 



Eupatorium. 



Leaves sessile, lanceoval, acute, obtusely cut- 

 toothed, pubescent ; calyxes pubescent, awnless, five 

 flowered. Mich. 



The name is taken from the resemblance of the leaves to the 

 upper ones of the officinal Vervain. Stem round, downy at top. 

 Leaves opposite, closely sessile, pointing upward, rounded at 

 base, acute, but not acuminate like the last, the sides cut into 

 very large, and rather blunt teeth. Corymb compound, termi- 



