90 COMPOSITiE. EuPATORiuM. 



21. E. aromaticum (Linn.) : pulverulent-pubescent or somewhat glabrous; 

 stem simple or loosely corymbose at the summit ; leaves ojjposite, on short 

 petioles, or sometimes almost sessile, ovate, subcordaie, or ovate-oblong, 

 rather acute or obtuse, rarely acuminate, 3-nerved or tri|)li-nervefl, of a 

 ihickish and firm texture, mostly scahrous-pubesceni, rather obtusely dentate- 

 serrate; corvmbs loose, somewhat panicled ; heads 8-'20- (commonly 12-15-) 

 flowered; scalesof the involucre 10-14, linear-lanceolate, nearly e(|ual, pubes- 

 cent, with slightly scarious and obtuse tips ; corolla narrowed below, cam- 

 panulate at the summit, rather exceeding the pappus; achenia glabrous. — 

 Linn.! sj^ec. 2. jp. 839 (fide herb.! & syn. PLuk. ! Sf Gronov.!) ; Willd. ! 

 spec. 3. J}. 1765 ; Michx.! ft. 2. p. 100 ; Pursh! fl. 2. 7;. 516 ; Ait.! Kew. 

 (ed. 2.) 4. p. 508 ; EU. ! sk. 2. p. 304 ,• Bigel. fl. Bost. cd. 2. p. 298 ; 

 Darlinfft. ! fl. Cest. p. 452 ,- DC! prodr. 5. p. 175. E. cordatum, Walt. 

 Car. p. 199; DC. ! I. c. (the smaller-leaved forms.) E. raelissoides, Willd.! 

 I. c. p. 1754. (a dwarf form ; heads about 8-flowered !) E. ceanothifnlium, 

 Muhl. in Willd. ! spec. I. c. (fide herb. Willd. ; but the heads at least 12- 

 flowered, instead of 5-flovvered) ; Ell.! I.e. (leaves sniall, peiioled ; heads 

 8-10-flowered I) ; DC! I.e. (leaves larger, acuminate, nearly glabrous!) 

 E. cordiforme & E. Fraseri, Poir. suppl. fide DC (Eupatorium, Lam. ill. 

 t. 672.) 



Dry woods and usually in barren soil, from Massachusetts near the coast ! 

 to Florida ! Alabama! and Louisiana! Aug.-Sept. — This species exhibits 

 considerable variety in the form of the leaves, the length of the i)etioles, &:c. 

 It bears much resemblance to the preceding, and occasionally approaches it 

 perhaps too closely ; but it is a lower and more slender plant, with smaller 

 and much firmer leaves on shorter petioles, fewer heads, but usuall}' larger 

 flowers. The root is perennial. 



22. E. ageratifolium (DC): shrubby, glabrous; the branches terete; 

 leaves opposite, petioled, broadly ovate, somewhat truncate at the base, at- 

 tenuate at the apex, obtuse, coarsely toothed, 3-nerved, not glandular; co- 

 rymbs terminal, trichotomous; pedicels somewhat viscous, scarcely pubes- 

 cent; heads about 10-flowered ; scales of the involucre in a double series, 

 linear, rather acute, slightly ciliate at the apex, at length spreading ; pappus 

 as long as the corolla ; achenia puberulent, the angles somewhat scabrous. 

 DC. !^ prodr. 5. p. 173. 



(3. Texense : branches, pedicels, petioles, and usually the veins of the 

 leaves minutely puberulent; heads about 12-flowered. 



Limestone rocks, Sabina's Creek (Camancheries) Texas, Dr. Riddell! {(i.) 

 — Shrub 6 feet high; the branches terete; the branchleis slightly angled. 

 Leaves in shape and texture wholly resembling many forms of E. aromali- 

 cum ; the corymbs also similar. Involucre about half the length of the 

 flowers, glabrous or nearly so ; the exterior scales 4-6, linear, rather acute, 

 one of them shorter and bracteolate ; the inner about the same number, 

 rather broader, with nanow scarious margins, somewhat obtuse, scarcely 

 ciliate at the apex. Corolla "white, slightly tinged with rose-color" {Rid- 

 dell), dilated upwards, scarcely longer than the pappus ; the teeth short, 

 glabrous. Achenia puberulent, and appearing somewhat viscous. — The 

 Texan plant accords almost exactly with De la Sagra's specimens from 

 Cuba, except that the scales of the involucre are less ciliate and more 

 obtuse. 



23. E. incarnatinn (Walt.) : stem pulverulent-pubescent, branching; leaves 

 opposite, on slender petioles, membranaceous, deltoid, truncate or subcor- 

 date (rarelv only obtuse) at the base, tapering at the siimnjii or acuminate, 

 obtusely and coarsely toothed, 3-nerved at the base, slightly pubescent ; co- 

 rymb small, often panicled ; heads 20-flowered ; scales of "the involucre 15- 

 20, nearly equal, (a few of the outermost shorter,) in a somewhat double 



