194 
COMPOSITE. (COMPOSITE FAMILY.) 
•*“ Heads 10 -15 -flowered : leaves opposite, clasping or united at the 
base , divaricate : corymbs very compound and large. 
10. E. resinosum, Torr. Minutely velvety-downy; leaves linear' 
lanceolate, elongated, serrate, partly clasping at the base, tapering to 
the point, slightly veiny beneath; scales of the involucre oval, ob¬ 
tuse.— Wet pine barrens, New Jersey. — Stems in tufts, 2° - 3? high. 
Leaves 4 ; -6 ; long, adhering to paper in drying, from the copious res¬ 
inous globules. 
11. E* perfoliatum, L. (Thoroughwort or Boneset.) 
Stem stout, hairy; leaves lanceolate , elongated, united at the base around 
the stem (connate-perfoliate), tapering to a slender point, serrate, very 
veiny, wrinkled, downy beneath ; scales of the involucre linear-lan¬ 
ceolate.— Low grounds, common, and well known. — Varies with 
the heads 30 — 40-flowered. 
* * * Heads 8 — ^-flowered; the scales of the involucre nearly equal 
and in one row: leaves opposite, ovate , petioled, triple-nerved and 
veitiy, not resinous-dotted : flowers white. 
12. E. ageratoides, L. (White Snake-root.) Smooth, 
branching; leaves broadly ovate, pointed, coarsely and sharply toothed, 
long-petioled , thin; corymbs compound. — Rich woods and copses, N. 
England to Wisconsin, common northward. — Stem 2°-3? high: 
leaves 4' - 5' long. 
13. E. aromaticum, L. Smooth or slightly downy; stems 
nearly simple; leaves on short petioles, ovate, rather obtusely toothed, 
not pointed, thickish.— Copses, Massachusetts to Penn, and south¬ 
ward, near the coast. — Resembles the last; but is lower and more 
slender, with fewer, but usually larger heads, and different leaves. 
MIKANIA, Willd. Climbing Hemp-weed. 
Heads 4-flowered. Involucre of 4 scales. Receptacle small. 
Flowers and achenia, &c., as in Eupatorium. — Climbing peren¬ 
nials, with opposite commonly heart-shaped and petioled leaves, 
and corymbose-panicled flesh-colored flowers. (Named in honor 
of Prof. Mikan, of Prague.) 
1. M. scandens, L. Nearly smooth, twining; leaves some- 
w at triangnlar-heart-shaped or halbert-form, pointed, toothed at the 
ase. Copses along streams, climbing over bushes. July - Sept. 
8- COKOCLINIIJM, DC. Mist-flower. 
Heads many-flowered. Involucre bell-shaped, the nearly equal 
linear-awl-shaped scales somewhat imbricated. Receptacle coni¬ 
cal ! Otherwise as in Eupatorium. — Perennial erect herbs, with 
