9.6 COMPOSITE. Eupatorium. 



■ ci/Iatiim, Muhl. in Willd. Spec. iii. 760. E. ternifolium, Ell. Sk. ii. 306 ; DC. Prodr. v. 1.51. 

 — -Low or wet ground, New Brunswick to Saskatchewan, Florida, and westward in wooded 

 districts to New Mexico, Utah, and Brit. Columbia. Varies greatly, yet manifestly one 

 species. The typical form very tall, growing in shady places, with smooth stem (usually 

 purple above the nodes), large and thin leaves and loose inflorescence, its branches slender- 

 peduncled. A narrow-leaved and attenuated form (var. angustifoUum, Torr. & Gray, 1. c.) is 

 E.fdirntum, Miclix. Fl. ii. 99, and E. kei-ii/utum, Torr. Cat. PI. N. Y. The best marked of 

 the variations are the following. 



Var. maculatum, Darl. Common in open ground, 3 or 4 feet high, often roughish- 

 pubescent : stem commonly purple, striate or sulcata ; leaves somewhat rugose, 3-5-nate : in- 

 florescence more compact and depressed. — Fl. Cest. 4133 ; Torr. & Gray, 1. c. E. maculatum, 

 L. 1. c. E. fusco-rubrum, Walt. Car. 199 "? E. punctatum, Willd. Enum. ii. 853. E. duhium, 

 Poir. Suppl. ii. 606. — The most widely distributed form. 



Var. amdenum. Leaves opposite or at most 3-4-nate, ovate or oblong, smootliish : 

 stem slender, 2 feet high : heads fewer and only 3-5-flowered. — E. ani'jenum, Pnrsh, Fl. ii. 

 514. — An attenuate or depauperate form, growing in rather dry woods, mountains of Vir- 

 ginia to New York. 



* * Involucre imbricated, rather lax ; the bracts of at least three or seldom onl v two lengths, the 

 enter successively shorter. — § Suhimbrlcata, DC. 



-)— Heads as many as 20-flowered, large (about half-inch long) : bracts of the involucre of 4 or 5 

 lengths, striate-nei'vose in the way of BrickeUia : perennial herbs, of a Mexican type. 



-w- Leaves entire, tonientose beneath. 



E. Bigelovii, Gkay. Cinereous-pubescent, paniculately branched : leaves all oppo.site, 

 ovate-lanccdlate with a rounded or obscurely cordate base, acute, entire, short petioled, 

 puberulent above, soft-tomentose beneath, 3-5-ribbed at base : inflorescence somewhat pa- 

 niculate : peduncles 3-5-cephalous : involucre turbinate, tomentulose, regularly imbricated ; 

 outer bracts ovate-lanceolate, acute, coriaceous, the innermost linear: flowers purplish: 

 akenes nearly glabrous. — Bot. Mex. Bound. 75. — Arizona, on the Gila, Bige/ow. 



++ ++ Leaves acuteh' serrate, narrowed at the pinnately veined base, very short-petioled. 



E. Bruneri. Minutely puberulent, apparently only a foot or two high : leaves opposite, 

 ovate-oblong, acute, loosely veiny (2 or 3 inches long) : paniculate rather slender peduncles 

 bearing 3 or more sessile or short-peduncled heads : involucre campanulate, of comparatively 

 few obscurely striate obtuse bracts ; the outer oval, puberulent ; inner ones scarions and 

 glabrous, flesh-color (as probably are the flowers) : akenes glabrous. — Damp ground, in the 

 Rocky Mountains at Fort Collins, N. Colorado, Dr. Bruner. 



■i-h 4-¥ -fri- Leaves coarsely and often obtusely dentate, 3-5-ribbed at tlie cordate or sometimes trun- 

 cate dilated base, slendcr-p3tioled, thin, bright greeen, acute or acuuiiiiate: flowers white or 

 whitish: bracts of the campanulate involucre conspicuously striate-uerved: akenes minutely 

 pubescent, not rarely 6-nervcd, or with one or two of the nerves double ! 



E. Pendleri, Gkay. A foot or two high, leafy, obscurely pulierulent : leaves opposite or 

 the u])per alternate, deltoid-subcordate, tapering gradually to an acute or acuminate point: 

 heads comparatively small and numerous, paniciilate, all peduncled : bracts of the involucre 

 all obtuse, the outer oblong. — Proc. Am. Acad. xvii. 205. BrickeUia FeiuVeri, Gray, PI. 

 Fendl. 63, & PI. Wright, ii. 73. (Some secondary or double ribs on many of the akenes 

 connect this with BrickeUia.) — Mountains of New Mexico and Arizona, Fendler, Wright, 

 Greene, Lemmon, Rtishjj. 



E. Parryi, Gray. Hirsutely pnliescont (the spreading hairs of the stem somewhat glandular 

 and viscid), loosely branched : leaves (so far as known) alternate, broadly ovate and rather 

 deeply cordate, crenately dentate : heads rather few and large in an open naked panicle, 

 slender-])e(lnnculate : bracts of the involucre thin, oblong-lanceolate, acuminate, the inner- 

 most produced into a setiform tip. — Bot. Mex. Bound. 75. — Sierra de Carmel, S. border of 

 Texas, on tiie Mexican side of the llio Grande, Parry. (Mex.) 



-}— -t— Heads 3-9-flowered, small (only 2 or 3 lines long), paniculate: leaves (at least the lower) 

 pinnately dissected, many of them alternate : involucral bracts 6 to 10, narrow, acute or abruptly 

 pointed, narrowly scarious-margiued, nerveless: flowers white or whitish: herbs very leafy, 

 much branched, with habit of Conyza and Artemisia. 



