82 COMPOSITiE. Eupatorium. 



ous globules, serrate, the teeth mucronulate; heads in a large compound 

 corymb, 5-9- (rarely 3-12-) flowered; achenia glabrous and more or less 

 glandular.— irf)n. .' spec. {eel. 1) 2. p. 838,- Hook.! fl. Bor.-Am. 1. p. 

 304; Darlingt. fl. Ccsl. p. 453. E. trifoliatum, Linn.! I. c. E. purpu- 

 reum, maculatuin, verticillatum, ternifolium, & dubium, DC. ! prodr. 5. 

 p. 151. 



a. stem tall, somewhat glabrous and glaucous, purple at the nodes (and 

 sometimes throughout) ; leaves (5-6 in a whorl) large, oblong-ovate, coarsely 

 serrate, somewhat petioled, often rugosely veiny ; corymb very large, convex. 

 — E. purpureum, Linn. ! I. c. (excl. /3.) S^- ed. 2. p. 1173; Willd. ! spec. 3. 

 p. 1759 (partly); Ell. I. c.l ^-c. ; DC! I.e. E. verticillatum, Willd.! 

 L. c. (herb. fbl. 1, & 2 !) E. trifoliatum, Darlingt. ! I. c. 



/?. jnaculatum (Darlingt. ! 1. c.) : stem mostly striate or grooved, pubescent 

 and often glandular or viscid above, punctate with purple linear spots ; 

 leaves (mostly ternate or quaternate) ovate, slightly tripli-nerved, petioled ; 

 corymb dense, depressed. — E. purpureum, /3. Linn.'! I. c. ed. I. E. macu- 

 latum, Linn. ! amosn. 4. p. 288, <^- spec. ed. 2. p. 1174 ; Willd. ! I. c. ; 

 Michx. ! fl. 2. p. 99 ; Bart. fl. Amer. Sept. t. 102 ; Ell. I. c. ; DC. ! I. c. 

 E. punctatum, Willd. ! enum. 2. p. 853 ; Ptirsh, fl. 2. p. 515. E. amcE- 

 num, Pursh! I. c. — Varies, with the leaves strongly rugose and scabrous- 

 pubescent both sides, or nearly smooth and glabrous ; either acute or acumi- 

 nate at each end (E. maculatum, Ell. I. c.) ; or obtuse at the base, and 

 pubescent and glandular beneath, as also the scales of the involucre (E. 

 ternifolium. Ell. I. c. ; DC. I. c); or with the leaves scarcely acuminate, 

 the involucre glabrous and about 3-flowered (E. dubium, Poir., X)C.) ; or 

 occasionally with the lower leaves ternate, the upper opposite, lie uppermost 

 sometimes even alternate (E. amoenum, Pursh, I. c.) ; and by other forms 

 with a shghtly punctate stem, elongated (mostly ternate) ovate-lanceolate 

 leaves, acuminate at both ends and coarsely serrate, (E. trifoliatum, Linn., 

 Darlingt. I. c.) approaching the original E. purpureum, so as to be undis- 

 tinguishable from its more slender states. 



y. angustifolium : stem tall, glabrous and somewhat glaucous, or pubes- 

 cent at the summit, sparingly punctate with linear spots; leaves (commonly 

 5 or 6 in a whorl), petioled, evenly and rather finely serrate ; the lower ones 

 oblong-lanceolate ; the upper linear-lanceolate ; corymb compound, panicu- 

 late-lhyrsoid, loose. — E. Iffivigatum, Torr. ! cat. jyl. Neiv York. — Varies (in 

 shady places,) with the heads and flowers nearly white, the leaves membra- 

 naceous and more deeply serrate, &c. ; when it is E. falcatum, Michx. ! fl. 

 2. p. 99. 



Low grounds, thickets, and swamps, Canada ! from the Saskatchawan, 

 and throughout the United States ! Aug.-Sept. — Stem 3-7 or even 10 feet 

 high. Involucre purplish or whitish ; the scales 12-18, obtuse; the exterior 

 very short, closely imbricated, pubescent ; the others linear-oblong and 

 linear, scarious, 2-3-nerved, shorter than the flowers. Corolla infundibuli- 

 form-tubular ; the lobes ovate-lanceolate, short, light purple or flesh-color. 

 Style with a small globose pubescent bulb at the base ; the branches very 

 nmch exserted. — This plant is sometimes employed medicinally, as a tonic. 



§ 3. Heads 3-many-flowered : scales of the somewhat cylindrical or cam- 

 panulate involucre 8-15, more or less iinhricatcd ; the exterior shortest: leaves 

 opposite, sometimes verticillate or alternate. {Stem herbaceous, flowers white, 

 and the corolla, achenia, &;c. more or less dotted with resinous globules in all 

 the North American species.) 



* PanicuMe : heads o-b-fl^ovxred : leaves allcrnatc, plmiatclij Med. 



3. E. fceniculaceum (Willd.) : paniculately very much branched ; stem 



