316 LXXV. COMPOSIT A. ~ Conociinium. 
*** Leaves opposite. Heads 8—20-flowered. 
13. E. PerFoLIATUM. Thoroughwort. Boneset. 
Lvs. connate-perfoliate, very pubescent.—A common, well known plant, 
on low grounds, meadows, U. 8. and Can. Abundant. Stem 1—5f high, 
round, rough and hairy. Each pair of leaves are so united at the base as to 
constitute a single lamina, centrally perforated by the stem, and placed at right 
angles to it; they are rough, rugose, serrate, tapering to a long point, and both 
combined, are 8—14’ in length. Heads about 12-flowered, clustered in large, 
terminal corymbs. Corollas white. Aug.—The plant is bitter, and is used in 
medicine as a tonic. 
14. E. restnosum. Torr. 
St. minutely tomentose; Jvs. linear-lanceolate, closely sessile, tapering to 
a long acumination, divaricate with the stem, slightly viscidly glandular both 
sides; corymé fastigiate, compound; /ds. 10—15-flowered; scales obtuse, hoary- 
tomentose.—Wet, sandy soils, N. J., Penn. Stem 2—3f high, growing in tufts, 
Leaves 3—6/ by 3—6”. Aug. Sept—This singular species appears to be nearly 
confined to the pine barrens of N. J., where it was first fount by Dr. Torrey. 
~15. E. aGeratToipes. Nettle-leaved Ewpatorium. 
' St. smooth, somewhat branched; lvs. on long petioles, subcordate, ovate, 
acuminate, dentate, 3-veined, nearly smooth; corymbs compound ; invol. simple, 
smooth.—Rocky hills and woods, Can. and U.S. Stem round, 2—4f high, 
and with the whole plant nearlysmooth. Leaves large, 3—6/ long, 2—4/ broad 
at base, coarsely toothed, petioles 1—2’ long. Heads numerous, in small clus- 
ters, constituting a compound corymb. Involucre scales mostly in a row, con- 
taining 12 or more flowers of a pure white. Aug. Sept. ‘ 
16. E. aromaticum. Aromatic Hupatoriwm. 
St. rough, pubescent, corymbose at summit; dvs. petiolate, opposite, sub- 
cordate, lance-ovate, acute, 3-veined, obtusely serrate, smoothish ; 7vol. simple, 
pubescent.—A handsome species, in low woods, Mass. to La. Whole plant 
slightly pubescent, about 2f high. Leaves 2—4’ long, 4 as wide, on petioles 
less than an inch long. Heads of the flowers large, 10—15-flowered, white and 
aromatic, in small corymbs. Scales about equal. Aug. Sept. 
17. E. seroTinum. Michx. 
St. puberulent, diffusely branched ; /vs. petiolate, lance-ovate, acute, sharp- 
ly serrate, tripli-veined, nearly glabrous; corymbs compound; hds. 12—15- 
Aowered: scales 10—12, scarious-edged, very pubescent. Ill. Mead, to Ga. 
Stem 4—6f high, somewhat paniculate above. Leaves 4—6’ by }—13’, upper 
ones nearly entire, and somewhat scattered, lower ones opposite, with large, 
irregular serratures. Sept. Oct. 
5. MIKANIA. Willd. - 
In honor of Professor Mikan, of Prague. 
Flowers all tubular ; involucre 4—6-leaved, 4—6-flowered ; recep- 
tacle naked; pappus capillary, simple, scabrous; anthers partly ex- 
serted ; achenia angled —Mosily climbing herbs. Lws. opposite. 
M. scanpens. Willd. Climbing Boneset. 
St. smooth; /vs. cordate, repand-toothed, acuminate, the lobes divaricate, 
rather unequal; /ds. in pedunculate, axillary corymbs.—A climbing plant of 
wet thickets, Mass.! to Ga., rather rare. Every part smooth. Leaves 2—3’by 
1—2’, on petioles 1—2’ long, apex tapering to a long point. Branches short, 
nearly fiikced, each bearing a small corymb of whitish, or pink-colored flowers. 
Aug. Sept. . 
6. CONOCLINIUM. DC. 
G7. Kkwvos, cone, k\wn, bed or receptacle. 
Heads many-flowered ; receptacle conical. Character otherwise as 
in Eupatorium.—2 Herbaceous or suffruticose. Lvs. opposite, petiolate, 
serrate. F'ls. blue or purple, in crowded corymbs. 
