516 
SYNGENESIA JEGUALis. Eupatoriunl. 
On the banks of rivers and in swamps ; frequent : New 
York to Carolina, v. v. From four to six feet high 5 
flowers purple. It differs from No. ] 8 in its stem, 
broader and smoother leaves, and white calyces 5 from 
No. 19 in its stem and smooth leaves. 
perfoliatum* 23. E. foliis connato-perfoliatis oblongis sursum angustatis 
serratis rngosis subtus tomentosis, caule viiloso. — 
Willd. sp. p/. 3. p. 1761. 
E. connatum. Mich Ji. amer. 2. p. 99. 
Icon. Pluk. aim t. 87. f 6. 
In low meadows and about springs : Canada to Florida. 
11 . Aug. — Oct V. V. From tvvo to three feet highj 
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-wort or Bone-set. I havef 
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 1 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. 
co?lestinum. 24. E. foliis petiolatis cordato-ovatis obnisiusculis tripliner- 
vibus obtuse serratis, floribus corymbosis. Willd. sp, 
pi. 3. p. 1764. 
Icon. Dill elth t. 114./. 159. 
In mountain- woods of Virginia to Carolina. %. Aug, 
— Oct. V. V. Flowers large, beautiful blue. 
aromaticum. 25, E. foliis petiolatis ovatis acutis trinervibus obtuse-serratis 
glabris, caule superne panicuiato, floribus corymbosis, 
calycibus siraplicibus. Willd. sp. pL 3. p. 1765. 
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. 
ageraioides. 26. E. foliis petiolatis ovatis acuminatis trinervibus inaequaliter 
grosse serratis glabris, corymbo multi floro divaricato, 
calycibus siibsimplicibus. Willd. sp. pi. 3. p. 1765. 
E. urticaetolium Mich fi amer. 2. p. 100. 
Ageratum altissimum. Sp pi ed. 2. p. 11 76. 
Icon. Moris, hist. 3. s. 7. t. 18./. il. 
