356 



COMPOSITAE. 



VOL. III. 



Receptacle flat. 



Flowers white ; leaves ovate. 



Leaves thin, 2' -5' long, sharply dentate, acuminate. 

 Leaves firm, \'-z' long, obtusely dentate, acute or obtusish. 

 Flowers pink to purple ; leaves deltoid-ovate. 

 Receptacle conic ; flowers blue or violet ; leaves petioled. 



1 8. E. urticaefolium. 



19. E. aromaticum. 



20. E. imarnatum. 



21. E. coelestinum. 



i. Eupatorium capillifolium (Lam.) Small. 

 Dog- fennel. Hog-weed. Fig. 4152. 



Artemisia capillifolia Lam. Encycl. I : 267. 1783. 

 Eupatorium foeniculc . des Walt. Fl. Car. 199. 1788. 

 E. foeniculaceum Wind. Sp. PI. 3: 1750. 1804. 

 . capillifolium Small, Mem. Torr. Club 5 : 311. 1894. 



Erect, paniculately much branched, with the as- 

 pect of an Artemisia, the stem finely pubescent, 

 4-io high. Leaves crowded, glabrous or nearly 

 so, alternate, pinnatifid into filiform segments, the 

 lower petioled, the upper sessile; heads very nu- 

 merous, about li" high, short-pedicelled, race- 

 mose-paniculate, 3-6-flowered; bracts of the invo- 

 lucre in about 2 series, linear, cuspidate, narrowly 

 scarious-margined, glabrous; flowers greenish- 

 white. 



In fields, Virginia to Florida. In ballast, at Phila- 

 delphia. Also in the West Indies. Sept. 



2. Eupatorium maculatum L. Spotted 

 Joe-Pye Weed. Fig. 4153. 



E. maculatum L. Amoen. Acad. 4: 288. 1755. 

 Eupatorium purpureum var. maculatum Darl. Fl. 



Cest. 453. 1837. 

 Eupatorium maculatum amoenum Britton, Mem. 



Torr. Club 5 : 312. 1894. 



Similar to the two following specie:, sca- 

 brous or pubescent, often densely so, 2-6 

 high. Stem usually striate, often rough and 

 spotted with purple ; leave:, thick, ovate or 

 ovate-lanceolate, coarsely dentate, verticillate 

 in 3's-5's, or the upper ones opposite ; inflores- 

 cence depressed, cymose-paniculate; pedicels 

 and outer scales of the involucre pubescent; 

 flowers pink or purple. 



In moist soil, Newfoundland to New York, 

 Kentucky, British Columbia, Kansas and New 

 Mexico. Spotted boneset. Perhaps to be re- 

 garded as a race of E. purpureum. Aug.-Sept. 



3. Eupatorium Bruneri A. Gray. Bru- 

 ner's Trumpet- weed. Fig. 4154. 



Eupatorium Bruneri A. Gray, Syn. Fl. i 2 : 96. 1 884. 

 Eupatorium Rydbergi Britton, Manual 921. 1901. 



Stem tall, pubescent, often densely so, at 

 least above. Leaves verticillate in 3's-5's, rather 

 slender-petioled, lanceolate, serrate, acuminate 

 at the apex, narrowed at the base, scabrous 

 above, finely densely pubescent and reticulate- 

 veined beneath, 4'-6' long, \'-2 r wide; inflores- 

 cence depressed or subpyramidal ; outer bracts 

 of the cylindric involucre pubescent; flowers 

 pink or purple. 



In moist soil, South Dakota to Wyoming, Ne- 

 braska and Colorado. Apparently erroneously 

 recorded from Iowa. July-Sept. 



