124 GAMOPETALOUS EXOGENS 



ft Heads 5- to 20-flowered; scales 8 to 15, unequal, more or less imbi-icated ; leayes 

 mostly opposite, sessile, sometimes connate ; flowers white. 



2. E. teucrif olium, Willd. Leaves ovate-lanceolate, coarsely 

 incised-dentate near the base ; inner scales of the involucre lance- 

 oblong, rather acute, but not acuminate. 



E. verbenaefolium. MX. $ Fl. Cestr. ed. 2. p. 450. 

 TEUCRIUM-LEAVED ETJPATORIUM. 



Stem 2 to 3 feet high, corymboeely hranched at summit, roughish-pubescent. 

 Leaves 2 to 4 inches long, obtuse at base, the upper ones smaller and entire. Heads 

 of flowers somewhat clustered. 

 Hob. Low swampy grounds; thickets, &c.: frequent. Fl. Aug. Fr. Sept. 



3. E. rotundif olium, L. Leaves roundish-ovate, subcordate 

 at base, crenate-serrate ; inner scales of the involucre lance-linear, 

 abruptly acuminate. 



BOUND-LEAVED EUPATORIUM. 



Stem about 2 feet high, slender, corymbose at summit, roughish-pubescent. 

 Leaves 1 to near 2 inches long, and nearly as wide as long, subcordate or truncate 

 at base, resinous-dotted. Heads of flowers in a dense flat-topped corymb. 

 Hob. Slaty, hilly woodlands : not common. Fl. Aug. Fr. Sept. 



4. E. sessilif olium, L. Leaves long-lanceolate, acute, rounded 

 at base, and gradually tapering to the slender apex, sharply serrate, 

 smooth ; scales of the involucre lance-oblong, obtuse. 

 SESSILE-LEAVED EUPATORIUM. 



Stem 2 to 3 or 4 feet high, slender, corymbose at summit, smooth, the branches 

 pubescent. Leaves 2 or 3 to 6 inches long, the base often subcordate and appa- 

 rently somewhat clasping, the under surface paler and minutely dotted. Heads 

 of flowers clustered ; scales punctate with brown dots. 

 Hob. Borders of woods, and thickets : frequent. Fl. Aug. Fr. Sept. 



5. E. perfoliatum, L. Leaves oblong-lanceolate, connate- 

 perfoliate, rugose-veined, crenate-serrate, very pubescent beneath ; 

 scales of the involucre lance-linear, acute. 



PERFOLIATE EUPATORIUM. Thorough-stem. Bone-set. Indian Sage. 

 Stem 2 to 4 feet high, rather stout, corymbose at summit, hirsutely pubescent, 

 the branches whitish and very pubescent. Leaves 4 to 6 or 8 inches long, more or 

 less completely united at base, rarely ternate, minutely resinous-dotted beneath. 

 Heads of flowers clustered, in large corymbs. 

 Hob. Low, swampy grounds : common. Fl. July. Fr. Sept. 



Obs. This species is generally known for its medicinal properties, 

 which are valuable, when rightly managed. 



t ft Heads 8- to 30- or iO-flowered; scales in a single series, nearly equal; leaves op- 

 posite, petiolate ; flowers very white. 



6. E. sicreratoicles, L. Leaves broad-ovate, acuminate, coarsely 

 and acutely serrate, thin and smoothish; petioles rather long; 

 scales of the involucre smoothish. 



AGERATUM-LIKE EUPATORIUM. 



Stem 2 to 3 feet high, somewhat branched, smooth, the summit and branches 

 pubescent. Leaves 2 to 4 or 5 inches long, the base dilated, often almost truncate, 

 BO as to make the leaves nearly deltoid, sometimes abruptly tapering to the peti- 



