418 Ordek 10.— COMPOSITES. 



tapering to a long point, and both combined, aro 8 to 14' in length. IId3. about 

 12-flowered, clustered in large, terminal corymbs. Cor. white. Aug. — The plant 

 is bitter, and is used in medicine as a tonic. 



19 E. resindsum Torr. St. minutely tomentous; lvs. linear-lanceolate, closely 

 sessile, distinct, tapering to a long acumination, divaricate with the stem, slightly 

 viscidiy resinous-glandular both sides ; corynib fastigiate, compound; hds. 10 to 

 15-flowered; scales obtuse, hoary -tomentous. — Wet, sandy soils, N. J., Pcnn. St 

 2 to 3f high, growing in tufts. Lvs. 3 to C by 3 to 6". Aug., Sept. — This sin- 

 gular species appears to bo nearly confined to the pine barrens cf N. J., where it 

 was first found by Dr. Torrey. 



20 E. serotinnm Mx. St. soft-puberulont, diffusely branched ; lvs. petiolate, 

 lance-ovate, acute or acuminate, sharply serrate, triple-veined, nearly glabrous; 

 corymbs compound; hds. 12 to 15-flowered; scales 9 to 11, nearly alike, scariou3- 

 edged, very pubescent. — Ind. to Iowa (Gousens), and Ga. (Miss Keen). St. 4 to 

 Gf high, somewhat paniculate above. Lvs. 4 to G' by f to 1-J', upper ones nearly 

 entire, scattered ; lower ones opposite, with largo irregular serraturos. Sept., Oct. 



21 E. ageratoides L. St. smooth, branched; lvs. on long petiola«, subcordato, 

 ovate, acuminate, dentate, 3- veined, nearly smooth; corymbs compound; invoL 

 simple, smooth. — Rocky hills and woods, Can. and U. S. St. round, 2 to 4f high, 

 and with the whole plant nearly smooth. Lvs. large, 3 to G' long, 2 to 4' broad 

 at base, coarsely toothed, petioles 1 to 2' long. Hds. numerous, in small clusters, 

 constituting a compound corymb. Invol. scales mostly in a row, containing 12 

 or more flowers of a puro white. Aug., Sept. 



22 E. aromaticum L. Si. rough, pubescent, corymbous at summit; lvs. petio- 

 lato, opposite, subcordato, lance-ovate, acute, 3-veined, obtusely serrate, smoothish ; 

 invol. simple, of about 12 lance-linear pubescent scales. — A handsomo species, in 

 low woods, Mass. to La. "Whole plant slightly pubescent, about 2f high. Lvs. 2 

 to 4' long, h as wido, on petioles less than an inch long. lids, of the Ms. large, 

 10 to 15-flowered, white and aromatic, in small corymbs. Scales about equal. 

 Aug., Sept. 



23 E. incarnatuni Walt. Minutely scabrous, diffusely branched; lvs. deltoid* 

 ovate, long-petioled, pointed, coarsely crcnatc-toothed. truncate or cordate ; ' hdai 

 on slonder ped., about 20-flowerod; Fcales 12 to 15, linear-acuminate, faintly 2- 

 striate, glabrous; cor. lobes pale-purple. — Damp soils, N. Car. (Shriver) to Fla. 

 (Chapman) and Tex. Height 2 to 3f. Corymbs very loose, paniculate. Sept, 

 Nov. Approaches Gonocliaium, but readily distinguished by its short, blunt styles. 



ii. MIKA^IA, Willd. Climbing Boneset. (In honor of Prof. 

 Mi/can, of Prague.) Flowers all tubular, $ ] involucre 4-1 cared, 4-flow- 

 ercd ; receptacle naked; pappus capillary, simple, scabrous; anther* 

 partly exsertcd ; achenia angled. — Mostly climbing herbs. Lvs. oppo- 

 site. 



M. scindens "Willd. St. smooth ; lvs. cordate, repanci-toothed, acuminate, the 

 lobes divaricate, rather unequal ; hds. in pedunculate, axillary corymbs. — A beau* 

 tiful climber of wet thickets, Mass. to Ga. (Miss Keen) and La., rather rare. Every 

 part smooth. Lvs. 2 to ?>' by 1 to 2', on petioles 1 to 2' long, apex tapering to a 

 long point. Branches short, nearly naked, each bearing a small corymb of white 

 or pink colored lis., almost always 4 in a head. Aug., Sept. 



12. CONOCLiriUM, DC. (Gr. K&vog. a cone, kXivt], bed or recepta- 

 cle.) Heads many-flowered ; receptacle conical, character otherwise a* 

 in Eupatorium. — U Herbaceous or suff'ruticous. Lvs. opposite, petio- 

 late, serrate. FIs. blue or purple, in crowded corymbs. 



C. coelestlnum DC. Herbaceous, nearly glabrous, much-branched, lvs. deltoid- 

 ovate, truncate or subcordato at base, tapering to an obtusish apex, crenate-ser- 

 rate, 3-veined, petiole slender, about half as long as the lamina; corymbs numer- 

 ous, subumbellate , scales numerous, linear. — Hedges, thickets, roadsides, &c. 

 Peon., Sou'-hem and "W. States. St 1 to 2}f high, terete, with opposite branches. 



