418 Order 70.— COMPOSITE 



tapering to a long point, and both combined, are 8 to li' in lengtli. Hds. about 

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

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



19 B. resinosum Torr. St minutely tomentous; Ivs. linear-lanceolate, chsely 

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

 riseidly resinous-glandular both sides ; corymb fastigiate, coinpound; hds. 10 to 

 lS-flow6red; scales obtuse, hoary-tomentous. — Wet, sandy soils, N. J., Penn. St 

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

 gular species appears to be nearly confined to the pine barrens of N. J., where it 

 was first found by Dr. Torrey. 



20 B. serdtinum Mx. St. soft-puberulent, dififusely branched; lvs. petiolate, 

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

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

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

 6f high, somewhat paniculate above. Lvs. 4 to 6' by } to 1-J', upper ones nearly 

 entire, scattered; lower ones opposite, with large irregular serratures. Sept., Oct. 



21 B. ageratoides L. St. smooth, branched; lvs. on long petioles, subeordate, 

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

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

 and with the whole plant nearly smooth. Lvs. large, 3 to 6' 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 pure white. Aug., Sept. 



.22 B. aromdticum L. St. rough, piibescent, eorymbous at summit ; lvs. petio- 

 late, opposite, subeordate, lance-ovate, acute, S-veined, obtusely serrate, smoothiBh; 

 invol. simple, of about 12 lance-hnear pubescent soales.-^A handsome species, in 

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

 to 4' long, J as wide, on petioles less than an inch long. Hds. of the fis. large, 

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

 Aug., Sept. 



23 B. incarn3.tuin "Walt. Minutely scabrous, dififusely branched; hs. deltoid- 

 ovate, long-petioled, pointed, coarsely crenate-toothed, truncate^ or cordate; hds. 

 on slender ped., about 20-flowered; scales 12 to 15, linear-acuminate, faintly 2- 

 striate, glabrous; cor. lobes pcde-purple. — Damp soils, N. Car. (Shriver) toTla. 

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

 Nov. Approaches Conoclinium, but readily distmguished by its short, blunt styles. 



11. MIKA'HIA, Willd. Climbing Bonesbt. (In honor of Prof. 

 Mikan, of Prague.) Flowers all tubular, ^ ; involucre 4-leaved, 4-flow- 

 ered ; receptacle naked ; pappus capillary, simple, scabrous ; anthers 

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

 site. 



M. scdndens "Willd. St. smooth ; lvs. cordate, repand-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 3' 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 whits 

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



12. CONOCLIN'IUW, DC. (Gr. Kuvog, a cone, Kktvrj, bed or recepta- 

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

 in Enpatorium. — 14 Herbaceous or suffruticous. Lvs. opposite, petio- 

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



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

 ovate, truncate or subeordate at base, tapering to an obtusish apex, orenate-ser- 

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

 ous, subumbellate , scales numerous, linear. — Hedges, thickets, roadsides, to, 

 Penn., Southern and "W. States. St. 1 to 2if high, t»rete, with opposite branches. 



