516 SYNGENESIA JE&UALIS.' Eupatoriunl. 
On the banks of rivers and in swamps ; frequent : New i 
York to Carolina, v. v. From four to six feet high 5 
flowers purple. It differs from No. 18 in its stem, 
broader and smoother leaves, and white calyces j from 
No. 19 in its stem and smooth leaves. 
perfoliatum • 23. E. foliis connato-pei foliatis oblongis sursum angustatis 
serratis rugosis subtus tomentosis, caule villoso. — 
Willd. sp. pl.3. p. 1761. 
E. connatum. Midi fi. amer. 2. p. 99. 
Icon. Pluk. alni t.S7.f.6. 
In low meadows and about springs : Canada to Florida. 
24 . Aug. — Oct v. v. From two to three feet high j 
flowers white. The whole plant is exceedingly bitter, 
and has been used for ages past by the natives and in- 
habitants in intermitting fevers. It is generally known 
by the name of Thorough-iuort or Bone-set. I have 
stated a case of its efficacy in those diseases in a letter 
to William Royston, Esq who inserted it in the Me- 
dical and Physical Journal. In which I stated the 
benefits derived from this plant, by myself and others 
during my stay in the neighbourhood of lake Ontario, 
when both the influenza and lake fever (similar to the 
yellow fever) were raging among the inhabitants. It 
is generally used as a decoction, or, which I consider 
the more effectual way, as an infusion in gin or rum. 
coelestinum . 24. E. foliis petiolatis cordato- ovatis obtusiusculis tripliner- 
vibus obtuse serratis, floribus corymbosis. Willd. spc 
pi. 3. p. 1 764. 
Icon. Dill, elth.t. 114 .f 159. 
In mountain- woods of Virginia to Carolina. 1/. Aug. 
— Cct. v. v. Flowers large, beautiful blue. 
aromaticum . 25. E. foliis petiolatis ovatis acutis trinen ibus obtuse-serratis 
glabris, caule superne paniculate, floribus corymbosis, 
calycibus simplicibus. Willd. sp. pl. 3. p. 1 7^5. 
Icon. Pluk. aim. t. 88 f 3. 
In woods and on the banks of rivers : Pensylvania to 
Florida. % Aug. — Oct. v. v. Flowers large, clear 
white, sweet-scented. 
ageratoides . 2 6. E. foliis petiolatis ovatis acuminatis trinervibus inaequaliter 
grosse serratis glabris, corymbo multifloro divaricato, 
calycibus subsimplicibus. Willd sp. pl. 3. p. 1J65* 
E. urticaefolium. Mich.fi amer 2. p. 100. 
Ageratum altissimum. Sp.pl ed. 2. p. Wj6. 
Icon. Moris, hist. 3. s. 7. t. 18./. 11. 
