328 COMPOSITE. Ecpatorium. 



somewhat triply-nerved, veiny, rough and a little pubescent, coarsely serrate-toothed ; branches 

 of the corymb few, often alternate ; heads glomerate ; scales of the involucre 10, hispidly 

 pubescent, oblong-lanceolate, rather acute, the interior ones shorter than the flowers. — Wi'ld. 

 sp. 3. p. 1753, and hort. Berol. t. 32; Pursh, fl. 2. p. 513; Torr compend. p. 234 ; DC. 

 prodr. 5. p. 178 ; Torr. 4- Gr. Jl. N. Am. 2. p. 86. E. verbenaefolium, Michx.fl. 2. p. 98 ; 

 Eil. sk. 2. p. 301 ; Bigel. Jl. Bost. p. 296 ; Beck, hot. p. 196 ; Darlingt. fl Cest. p. 450. 

 E. lanceolatum, Mtihl. in Willd. I. c. E. pubescens, Bigel. I. c. not of Muhl. ^ Willd. 



Stem 2-3 feet high, strict, rather slender, finely striate. Leaves 2-3 inclies long; the 

 serratures or teeth often very coarse ; lower leaves so closely sessile and broad at the base as 

 to appear somewhat clasping ; upper ones obtusely cuneaie at the base ; the epidermis of the 

 upper surface sometimes furnished with minute bristles. Corymbs usually dense, but in shady 

 places often open. Heads often 6-flowered. Scales of the involucre a little scarious and 

 whitish at the tip. 



Low grounds and borders of thickets ; Long Island, &c.; not found in the interior of the 

 State. Fl. August - September. 



4. EuPATORiuJi ROTUNDiFOLiuM, Linn. Round-leaved Hemp-weed. 

 Stem densely pubescent, corymbose at the summit ; leaves opposite, roundish-ovate, mostly 



obtuse, truncate or somewhat cordate at the base, sessile, triply nerved, veiny, rough and 

 pubescent, pale or somewhat hoary and glandular underneath, deeply crenate-toothed ; corymb 

 fastigiate ; heads 5-flowered ; scales of the involucre 8-10, very pubescent, glandular; the 

 exterior very short ; the interior linear-lanceolate, abruptly acute or acuminate. — Linn. sp. 2. 

 p. 3S7 ; Michcc. fl. 2. p. 98 ; Pursh, fl. 2. p. 514 ; Ell. sk. 2. p. 310 ; Torr. compend. 

 p. 284; Hook.fl. Bor.-Am.l.p. 304; Beck, bot. p. 196; DC. prodr. 5. p. 178; Darlingt. 

 fl. Cest. p. 450; Torr. ^ Gr fl. N. Am. 2. p. 87. E. Marrubium, Walt. fl. Car. p. 199. 



Stem 2-3 feet high, slender, the pubescence rather rough. Leaves 1-2 inches long, 

 sometimes almost orbicular, sprinkled with resinous dots. Corymb flat-topped. Styles much 

 exserted. Achenia glandular. Pappus a little longer than the corolla. 



Sandy fields. Queens county, Long Island {Mr. Willis). Fl. August - September. 



5. EuPATORiuM sEssiLiFOLiuM, Linn. Upland Boneset. 



Smooth ; stem usually flexuous, corymbosely branched at the summit ; leaves lanceolate 

 or ovate-lanceolate, closely sessile or partly clasping, rounded at the base, tapering to the 

 acuminate apex, sharply serrate, obscurely punctate and paler underneath ; heads 5-flowered ; 

 scales of the involucre 10, imbricated somewhat in a triple series, oval or oblong obtuse, 

 canescently pubescent, glandular. — Linn. sp. 2. p. 837 ; Michx. fl. 2. p. 98 ; Pursh, fl. 2. 

 p. 513 ; Ell. sk. 2. p. 297 ; Bigel. fl. Bost. p. 295 ; Beck, bot. p. 197 ; Darlingt. fl. Cest. 

 p. 451 ; DC. prodr. 5. p. 151 ; Torr. ^ Gr. fl. N. Am. 2. p. 88. E. truncalum. Ell. I. c. 



