COMPOSITAE 1 23 



inches long, the upper ones very short and almost subulate. Heads of flowers 

 about half an inch long, subcylindric, crowded in a terminal spike 6 to 12 or 15 

 inches in length; outer scales ovate, the inner ones oblong, the margins often pur- 

 ple. Akenes hirsute, or finally smooth; pappus scabrous or barbellate. 

 Hob. Borders of woods; clearings, &c.: frequent. Fl. Aug. Fr. Sept. 



Obs. The root of this has been deemed medicinal. JOHN BAR- 

 TRAM, in his Appendix to SHORT'S Medicina Jlritannica, calls the 

 plant "Jacea," and "Throat-wort." 



187. KlTHtf IA, L . 



[Dedicated to Doctor Adam Kuhn, of Philadelphia; a pupil of Linnaeus.'] 

 Heads 10- to 25-flowered, in a small paniculate corymb. Scales of 

 the involucre few, lanceolate, loosely imbricated. Akenes^ cylindric, 

 finely striate ; pappus a single series of very plumose bristles. Pe- 

 rennials : leaves mostly alternate, resinous-dotted ; floivers white, or 

 ochroleucous. 



1. K.. eupatorioides, L. Leaves lanceolate serrate and petio- 

 late, or linear entire and sessile ; heads of flowers cylindric. 

 Also, K. Critonia. Willd. $ FL Cestr. ed. 2. p. 449. 



EUPATORIUM-LIKE KUHNIA. 



Stem 2 to 3 feet high, slender, somewhat corymbosely branched, pubescent. 

 Leaves 1 or 2 to 3 or 4 inches long. Corymb paniculate, or sometimes rather short 

 and dense. Akenes pubescent; pappus white, or often tawny. 

 Hob. Dry banks ; Great Valley : rare. FL Sept. Fr. Octo. 



Obs. The K. Critonia, Willd. is now regarded as a narrow-leaved 

 variety. It is rather less rare, here, than the other form. 



188. ElIPATCmiUM, Tournef. 



[Dedicated to Eupator Mithriclates, who brought the plant into notice.] 

 Heads 3- to many-flowered, mostly corymbose. Involucre oblong; 

 scales imbricated in 2 or more series, or sometimes nearly equal in 

 a single series. Florets tubular, scarcely dilated at throat. Akenes 

 5-augled; pappus a single row of slender roughish bristles. Recep- 

 tacle flat. Perennials : leaves mostly opposite or verticillate, often 

 resinous-dotted; flowers white, or purplish. 



f Heads 5- to IQ-Jlowered ; scales closely imbricated in several series of unequal length ; 

 leaves verticillate, petiolate ; flowers purplish. 



1. E. purpiircuiii, L. Stem stout, simple; leaves 3 to 6 in a 

 whorl, lance-oblong or lance-ovate, serrate; corymb large, com- 

 pound. 



Also, E. trifoliatum. L. $ Fl. Cestr. ed. 2. p. 453. 

 PURPLE EUPATORIUM. 



Stem, 3 or 4 to 6 or 7 feet high, fistular, smoothish and glaucous-purple, or some- 

 times solid with pith, spotted, and more or less pubescent. Leaves 3 or 4 to 8 or 

 10 inches long; petioles half an inch to 2 inches in length. Heads of flowers in a 

 terminal corymb of varying size, and shades of purple. 

 Hab. Moist low grounds, and thickets : frequent. Fl. Aug. Fr. Sept. 



Obs. Some 4 or 5 forms of this plant, heretofore considered as 

 xpecies, by different authors, are now better regarded as mere varie- 

 ties. 



