362 COMPOSITAE. Vou. III. 
19. Eupatorium aromaticum L. Smaller 
White Snake-root. Fig. 4170. 
Eupatorium aromaticum L. Sp, Pl. 839. 1753. 
Puberulent or glabrate, slender, branched at 
the summit, 1°-2° high. Leaves opposite, peti- 
oled, firm, obtuse or acutish at the apex, round- 
ed, cordate or sometimes narrowed at the base, 
crenate-dentate, 14’-3’ long, 9-18” wide, 3- 
nerved and veiny; petioles 2-8” long; in- 
florescence. usually compact; heads 10-25-flow- 
ered; receptacle flat; involucre campanulate, 
14”-2” high, its bracts linear, generally obtuse, 
in I or 2 series; flowers white. 
In dry soil, Massachusetts to Florida, Pennsyl- 
vania, West Virginia, Tennessee and Mississippi. 
Blooms rather later than the preceding species 
where the two grow together, near New York. 
Called also poolroot, poolwort, and wild hoar- 
hound. Aug.—Oct. 
20. Eupatorium incarnatum Walt. 
Pink Thoroughwort. Fig. 4171. 
E. incarnatum Walt. Fl. Car. 200. -1788. 
Minutely pubescent, 2°-4° high, some- 
times reclining, often diffusely branched. 
Leaves opposite, deltoid-ovate, ?’-2}’ 
long, long-pointed, rather coarsely blunt- 
serrate or crenate-serrate, truncate or 
cordate at the base, the petioles slender, 
often as long as the blades; heads about 
20-flowered; involucres campanulate, 
about 2” high, its bracts few, narrowly 
linear, slightly ribbed when dry, acute; 
corolla pink or pale purple. i 
In woods and sandy soil, Virginia to Mis- 
y: 
21. Eupatorium coelestinum L. Mist- 
flower. Blue Boneset. Fig. 4172. 
Eupatorium coelestinum L. Sp. Pl. 838. 1753. 
Conoclinium coelestinum DC, Prodr.5:135. 1836. 
Pubescent or puberulent, branched, 1°-3° 
high. Leaves opposite, petioled, ovate, obtuse 
or acute at the apex, truncate at the base, or 
abruptly contracted into the petiole, crenate- 
dentate, 13’-3’ long, 9-18” wide; inflorescence 
cymose-corymbose, rather compact; heads 2”- 
3” high; involucre broadly campanulate, its 
bracts linear-lanceolate, acuminate, equal or 
nearly so, in I or 2 series; receptacle conic; 
flowers blue’or violet. 
In moist soil, New Jersey to Florida, Illinois, 
Michigan, Kansas, Arkansas and Texas. Also in 
Cuba. Aug.—Oct. 
a 
5. MIKANIA Willd. Sp. Pl. 3: 1742. 1804. 
[WittucHBaEa Neck. Elem. 1: 82. Hyponym. 1790.] 
Herbaceous twining vines, or some tropical species erect shrubs, with opposite, petioled 
leaves, and discoid, mostly cymose-paniculate heads of whitish flowers. Heads 4-flowered. 
Involucre oblong, of 4 slightly unequal narrow bracts. Receptacle small, naked. Corolla 
