EuPATORiuM. COMPOSITiE. 329 



Stem 2-4 feet high, very smooth, finely striate ; the corymbose branches and pedicels 

 pubescent. Leaves 3-5 inches long and 1-1^ inch wide, rather thin. Corymb widely 

 spreading, very compound. Heads cylindrical, always 5-flowered. Scales greenish-white, 

 very pubescent. Pappus longer than the flower. 



Borders of woods, in dry bushy places and on rocky hill-sides. August - September. Not 

 rare, except in the western part of the State. 



6. EuPATORiUM PERFOLiATUM, Linn. Boneset or ThoroughworL 



Leaves connate-perfoliate, lanceolate-oblong, acuminate, crenate-serrate, rugose, pubescent 

 underneath; heads commonly 10-flowered. — Linn. sp. 2. p. 838 ; Pursh,Jl. 2. p. 516 ; EIL 

 xk. 2. p. 302 ; Bigel. med. hot. 1. p. 328. t. 2, and Jl. Bost. p. 297; Raf. med. hot. t. 36 ^ 

 Beck, hot. p. 198 ; Darlingt, Jl. Cest. p. 451 ; Hook. fl. Bor.-Am. 1. p. 305 ; DC. prodr. 

 5. p. 151 ; Torr. ^ Gr. jl. N. Am. 2. p. 88. E. connatum, Michx. jl. 2. p. 99. 



Stem stoat, 2-4 feet high, mostly solid, terete, clothed with a woolly or hairy pubescence. 

 Leaves 4-8 inches long, for the most part perfectly united at their bases, but sometimes 

 contracted and only slightly connate, decussate, divaricate ; the veinlets reticulated and pro- 

 minent underneath, copiously sprinkled with resinous dots. Corymb large, fastigiale, very 

 compound. Scales of the involucre 12 - 15, very pubescent, glandular; inner ones linear- 

 lanceolate, with scarious tips. Styles much exserted. Achenia glandular. Pappus shorter 

 than the corolla. 



Low swampy grounds ; very common throughout the State. July - September. A popular 

 as well as ofEcinal medicine. It is a tonic, diaphoretic, emetic or aperient, according to the 

 dose. The common mode of administering it is in the form of infusion ; but sometimes the 

 powdered leaves are given. See Bigelow's Medical Botany, I. c, and Wood <^Bache's U. S. 

 Dispens. p. 297. 



^ 3. Heads 8 - SOjlowered : scales of the campanulate involucre 8 - 20, nearly equal and in a single 

 series ; leaves opposite, ovate, petioled, not punctate or sprinkled with resinous grains : achenia 

 not glandular : Jlowers white or purple. 



7. EuPATORiuM AGERAToiDES, Linn.f. White Snakeroot. 



Smooth ; stem branching at the summit ; leaves on long petioles, broadly ovate, sometimes 

 slightly cordate, acuminate, triply nerved, membranaceous, coarsely and sharply serrate ; 

 heads 12 - 20-flowered ; scales of the involucre narrowly lanceolate, scarious and rather 

 obtuse at the tips, slightly pubescent and ciliate. — Linn. f. suppl. p. 355 ; Willd. sp. 3. 

 p. 1765 ; Pursh, jl. 2. p. 516 ; Ell. sk. 2. p. 303 ; Bigel. jl. Bost. p. 298 ; Hook. jl. Bor.- 

 Am. I. p. 305; Beck, hot. p. 198 ; DC. prodr. 5. p. 175 ; Darlingt. jl. Cest. p. 451 ; Torr. 

 4- Gr. fl. N. Am. 2. p. 89. E. urticaefolium, Michx. jl. 2. p. 100, not of Linn. Ageratum 

 altissimum, Linn. sp. 2. p. 839. 



[Flora.] 42 



