360 COMPOSITAE. Vo. III. 
13. Eupatorium verbenaefélium Michx. Rough or Vervain Thoroughwort. 
Fig. 4164. 
1 Ye Eupatorium pilosum Walt. Fl. Car. 199. 1788. ? 
Eupatorium verbenaefolium Michx. Fl. Bor. 
Am. 2: 98. 1803. 
E. teucriifolium Willd. Sp. Pl. 3: 1753. 1804. 
E. verbenaefolium Saundersi Porter; Britton, 
Man. 923. 1901. 
Rough-pubescent, slender, 3°-8° high, 
branched at the summit. Leaves opposite, 
or occasionally in 3’s, ovate-oblong, usually 
obtuse or blunt-pointed, closely sessile or 
rarely short-petioled, rounded or narrowed 
at the base, crenate-dentate, or incised, 
2’-4’ long, 4’-1' wide, the upper pairs dis- 
tant and small; inflorescence cymose- 
paniculate; heads 5-flowered, about 3” high; 
involucre campanulate, its bracts linear- 
lanceolate, acute, imbricated in about 3 
series, densely pubescent, the outer shorter; 
flowers white. 
In moist soil, Massachusetts to Pennsylva- 
nia, West Virginia, Florida and Louisiana, 
mostly near the coast. Called also wild hoar- 
Z 
ice 
hound, July—Sept. 
‘ CO WHY 
.\ y 
14. Eupatorium rotundifolium L. 
Round-leaved Thoroughwort. 
Wild Hoarhound. Fig. 4165. 
E. rotundifolium L. Sp. Pl. 837. 1753. 
Pubescent, branched at the summit, 1°-3° g&BA ( Bay 
high. Leaves opposite, sessile, broadly ovate, a ) eneeael 
often as wide as long, acutish or obtuse, trun- y 
cate to subcordate at the base, coarsely dentate- 
crenate, 1-2’ long, ascending; inflorescence 
cymose-paniculate; heads about 5-flowered, 
2”-3” high; involucre campanulate, its bracts 
linear-oblong, acutish, densely pubescent, im- 
bricated in about 3 series, the outer shorter; 
flowers white. 
In dry soil, Rhode Island to Pennsylvania, 
Florida, Kentucky, Arkansas and Texas. Erro- 
neously reported from Canada. July—Sept. 
15. Eupatorium pubéscens Muhl. Hairy 
Thoroughwort. Fig. 4166. 
E. pubescens Muhl.; Willd. Sp. Pl. 3: 1755. 1804. 
Eupatorium rotundifolium var. ovatum Torr.; DC. 
Prodr. 5: 178. 1836. 
Puberulent or pubescent, branched above, 
usually taller than the preceding species. Leaves 
opposite, ovate, sessile, often twice as long as 
wide, acute at the apex, rounded or subtruncate 
at the base, coarsely dentate with acute or acut- 
ish teeth, or the lower incised; inflorescence 
cymose-paniculate, sometimes 10’ broad; heads 
5-8-flowered, 2’-3” high; involucre campanu- 
late, its linear-oblong bracts in 2 or 3 series, 
the outer shorter; flowers white. 
In dry soil, Maine to Pennsylvania, South Caro- 
lina, West Virginia and Tennessee. Recorded 
from Florida. Ascends to 3000 ft. in Virginia. 
July—Sept. 
