158 Rhodora [OcroBER 
1. Leaves ovate to ovate-lanceolate, abruptly contracted into the 
petiole, more or less 3-nerved; plant somewhat viscid, scabrous- 
puberulent, with a strong odor when fresh: stems finely purple- 
specked, not glaucous: inflorescence convex: leaves in 3’s or 4's, 
very rarely in 2's or 5's: florets 6-9, rarely 5-12. Along the Coastal 
Plain from eastern Massachusetts and southern New Hampshire to - 
South Carolina. A plant of wet soil. 
2. Leaves elliptic-ovate or elliptic-lanceolate or ovate-oval, taper- 
ing at the base, 3-nerved or pinnately veined; plant not viscid and 
not odorous; stem speckled or sometimes deep purple all over, not 
glaucous: inflorescence or its divisions flat-topped; leaves in 4's or 
5's, rarely in 3's or 6's: florets 9-15, rarely 8-20, scarcely exserted. 
Newfoundland through Northern New England to western Con- 
necticut and central Pennsylvania, westward to Illinois and Colo- 
rado, New Mexico and British Columbia. A plant of wet soil. 
3. Leaves elliptic-lanceolate, tapering at the base, pinnately 
veined; plant not viscid and not odorous; stems rarely speckled, 
fistulose, purple, plainly glaucous; inflorescence convex; leaves in 
4’s to 6’s, rarely in 7’s, bluntly toothed; florets 5-7, rarely 3-8, 
scarcely exserted; corollas 3.5-4.8 mm. long, very rarely longer. 
Southern Maine and Rhode Island to Florida, Texas and Oklahoma; 
also in western Pennsylvania and Ohio. A plant of damp woods 
and pastures on the Atlantic Coast and Uplands. 
4. Leaves lanceolate, ovate-oval or ovate, tapering at the base, 
pinnately veined; plant not viscid and not odorous; stems rarely 
speckled, solid, green with purple nodes, faintly glaucous; inflores- 
cence convex; leaves in 3’s or 4’s, very rarely in 2’s or 5’s, sharply 
toothed; florets 5-7, rarely 3-8, much exserted; corollas 5.5-7.5 
mm. long; heads paler than in the other species. Eastern Massachu- 
setts and southern New Hampshire westward to Wisconsin and south- 
ward to Pennsylvania, Kentucky, Oklahoma and Nebraska; also 
in the mountains from Virginia to Georgia. A plant of rich upland 
woods, rarely found near the coast. 
EvPATORIUM PURPUREUM L. 
Let us first take up the problem of the identity of Eupatorium 
purpureum L. itself. The original Linnaean description (Sp. Pl. 
838) is as follows: 
