COMPOSITAE (COMPOSITE FAMILY) 41? 



long, round-topped, corymbose clusters, pinkish purple, fragrant ; 

 the florets all tubular and perfect. Achenes very small, black, 

 angled, with a funnel-shaped pappus of fine, bristly hairs. The 

 plant is often accompanied by a nearly related variety, the 

 SPOTTED JOE-PYE WEED (E. maculatum, L.), differing in that it 

 has rough-hairy leaves and stem, green and more or less spotted 

 with purple; heads similar, but with broader, flatter cluster 

 and the root also is medicinally valuable. (Fig. 291.) 



Means of control 



Only grubbing out bodily or repeated deep cutting throughout 

 the growing season will rid grasslands of this weed. Plants on 

 waste grounds and in thickets should also be prevented from seed 

 production. 



THOROUGHWORT 

 Eupalorium perfoliatum, L. 



Other English names: Boneset, Agueweed, Feverwort, Crosswort, 

 Sweating Plant, Vegetable Antimony. 



Native. Perennial. Propagates by seeds. 



Time of bloom : July to September. 



Seed-time: September to November. 



Range: New Brunswick to Manitoba and North Dakota, south- 

 ward to Florida and Texas. 



Habitat: Wet meadows, swamps, sides of streams, and ditches. 



A near relative of Joe-Pye Weed, and also used in medicine, 

 the parts desired being the flowering tops, gathered when in full 

 bloom, and the leaves, stripped from the stalks and quickly dried, 

 for which collectors receive three to eight cents a pound. 



Stem two to five feet tall, rather stout, hairy, branching at the 

 top. Leaves deep green, long-pointed, opposite, and united at the 

 base, seeming like a single leaf through which the stem has grown, 

 downy beneath, somewhat wrinkled, prominently veined, finely 

 scallop-toothed. Heads very small, in rather compact corymbose 

 clusters, dull white or very rarely blue, the florets all perfect and 

 fertile ; as they mature, the lengthening and expanding hairy para- 

 chutes of the achenes make the clusters appear like fleecy tufts 

 of wool. 



Means of control the same as for Joe-Pye Weed. 



2E 



