EuPATORitiM. COMPOSITiE. 327 



tided.- E. purpureum, /3. Linn. sp. ed. 1. I. c. E. purpureum, var. maculatum, DarUngt. 

 I. c; Torr. ^ Gr. I. c. E. maculatum, Linn. sp. ed. 2. p. 1174; Willd. I. c ■ Michv I c ■ 

 Bart. fl. Am. Sept. t. 102. E. punctatum, Willd. enum. 2. p. S53 ; Pursh, Jl. 2 p 515 

 E. amcEnum, 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 situations) very rugose and of a thick texture, at other times (especially in shady 

 swamps) thin and membranaceous, often cuneate 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 

 wliites. 



§ 2. Heads somewhat cylindrical or campanulate, 5 - many-floicered : scales 8-15, viore or less 

 imbricate; the exterior shortest : leaves opposite : flowers while : leaves, corolla and achcnia 

 more or less dotted with resinous grains. 



2. EuPATORiuM LEucoLEPis, T. S^' G. (PI. xlviii.) White-scakd Hemp-weed. 



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 

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

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

 Torr. 4r Gr. fl. N. Am. 2. p. 84. E. glaucescens, /3. leucolepis, DC.prodr 5 p 177 E 

 hnearifolium, Michx.fl. 2. p.'97 (partly) ; Pursh, fl. 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 cxscrtcd.' 



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

 August - October. 



3. EuPATORitM TEucRiFOLiUM, WiHd. Gerinandcr-leavcd Ilcmp-weed. 



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



altemato), closely sessile, ovatc-oblong and ovatc-lanceolatc, obtuse or truncate at the base. 



