342 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
a' . Florets 5 to 7 (rarely 3 to 8) ; inflorescence convex; stems rarely speckled, 
more or less glaucous. 
Stems fistulose, purple, plainly glaucous; leaves in 4's to 6's, bluntly 
toothed, scabrous-puberulent b(!neath or glabrate; florets scarcely 
exsertcd ; corolla 3..') to 4.8 mm. long, very rareh' longer . . E. purjmreum. 
Stems solid, green with purple nodes, faintly glaucous; leaves in 3's or 4's, 
very rarely in 2's or 5's, sharply toothed, villous-pubescent beneath, or 
glabrate; florets much exserted; corollas 5.5 to 7.5 mm. long; heads 
paler than in the other species E. falcatum. 
E. falcatum Michx. — {E. purpurcum Man. ed. 7 in part; vid. 
Rhodora, 22: 68, 1920.) 
Dry vi^oods, Stockbridge, New Marlboro. 
E. maculatum L. Joe-Pye Weed. — (E. purpureum, var. macu- 
latuvi Man. ed. 7; vid. Rhodora, 22: 64, 1920.) 
Wet meadows and borders of swamps; common. 
A plant from swampy woods, Lenox, with the upper leaves 26 cm. 
long and about 4 cm. broad has been determined by Professor Wiegand 
as a shade form of this species. 
E. perfoliatum L. Boneset; Thoroughwokt. — Low ground; 
common. 
A form with the leaves in 3's from Sheffield (Walters). 
var. truncatum Gray. — Damp woods, Mt. Washington; Sheffield 
(Walters). 
E. purpureum L. Joe-Pye Weed. — Rich open woods and road- 
side thickets; common in the valley. 
E. sessilifolium L. — Dry open woods on limestone knoll, New 
Marlboro. 
E. urticaefolium Reichard. White Snakeroot. — Rich woods; 
common. Altitude 2500 feet, Greylock. 
GALINSOGA. 
G. PARViFLORA Cav. — Railroad, Cheshire (Churchill) ; cultivated 
ground, Lenox; garden weed, Sheffield. First noted in 1918. 
G. ARiSTULATA BickncU. — {G. parviflora, var. hispida Man. ed. 7; 
md. Rhodora, 22: 98, 1920.) | 
First noted in 1899 and now thoroughly established as a garden 
weed and in waste places in the valley. Introduced from South 
America. 
