EuPATORiuM. COMPOSITE. 3?7 



tided. — E. purpureum, j3. Linn. sp. ed. \. I. c. E. purpureum, var. maculatum, Darlingt. 

 I. c; Torr. <^ Gr. I. c. E. maculatum, Linn. sp. ed. 2. p. 1174 ; Willd. I. c. ; Michx. L c; 

 Bart. Jl. Arn. Sept. t. 102. E. punctatum, Willd. cnum. 2. p. S53 ; Pursh, jl. 2. p. 515. 

 E. amoenum, Fursh, I. c. E. ternifolium, Ell. sk. 2. p. .306. E. trifoliatum, Linn. I. c. 



An extremely variable plant. Stem 3-8 feet high, hollow, or more or less completely 

 filled with pith. Leaves 3-8 inches long and 2-3 inches wide, sometimes (particularly in 

 dry open siiuations) very rugose and of a thick texture, at other times (especially in shady 

 swamps) thin and membranaceous, often cuneatc at the base, with a very distinct petiole. 

 Corymb sometimes nearly a foot in diameter. Involucre purplish or whitish ; the scales 

 12-18, lanceolate and oblong, slightly 2 - 3-nerved. Corolla pale purple or flesh-color. 

 Style very much exserted, bulbous at the base. 



Swamps, borders of low woods, and wet thickets ; very common. August. 



The various forms of this plant have been regarded as distinct species by many botanists, 

 but they seem to pass insensibly into each other. A decoction of the root is used as a remedy 

 for gravel. The popular name is said to be that of an Indian who recommended it to the 

 whites. 



^ 2. Heads somewhat cylindrical or campanulate, 5 - many-JloU'cred : scales 8 - 15, 7norc or less 

 imbricate; the exterior shortest : leaves opposite : flowers white: leaves, corolla and achenia 

 more or less doited with resinous grains. 



2. EuPATORiuM LEUcoLEPis, T. Sf G. (PI. xlviii.) Whitescttled Hemp-ioeed. 



Stem mostly simple, puberulent ; leaves opposite, divaricate, lanceolate or linear, obtuse, 

 closely sessile, serrate, very rough on both sides, punctate, strongly one-nerved , the lower 

 ones obscurely 3-nerved or somewhat veiny ; corymb fastigiate, canescent ; scales of the 

 involucre 8-10, lanceolate, acute or acuminate, very pubescent and glandular on the back, 

 white and scarious at the summit, as long as the flowers ; achenia minutely glandular. — 

 Torr. ^ Gr. jl. N. Am. 2. p. 84. E. glaucescens, .S. leucolepis, DC.prodr. 5. p. 177. E. 

 linearifolium, Michx. fl. 2. p. 97 (partly) ; Pursh, Jl. 2. p. 513 (partly) ; Nutt. gen. 2. p. 135. 



Stem about 2 feet high, slender. Leaves 2 inches long and 4-5 lines wide, spreading and 

 often a little recurved, sometimes fascicled in the axils, of a pale glaucous hue ; the serratures 

 appressed. Branches of the small compound corymb clothed with a short whitish pubescence. 

 Corolla dilated at the base ; the limb campanulate ; lobes ovate, short. Style much exserted. 



Rather dry sandy swamps ; near Sag-Harbor, Long Island {Mr. S. B. Buckley). Fl. 

 August - October. 



3. EuPATORiUiM TEUCRIFOLIUM, Willd. Germander -kuved Hemjp-wced. 



Stem roughish-pubescent, corymbose at the summit ; leaves opposite (the uppermost often 

 alternate), closely sessile, ovatc-oblong and ovate-lanceolate, obtuse or truncate at the base. 



