96 COMPOSITE. Eupatorium. 



cillatum, Muhl. in AViUd. Spec. iii. 760. E. termfolium, Ell. Sk. ii. 306 ; DC. Prodr. v. l.'il. 

 — Low or wet ground, New Brunswick to Sa.skatchewan, Florida, and westward in wooded 

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

 specie.s. Tlie 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. angustifulinm, Torr. & Gray, 1. c.) is 

 E.fiilmtiim, Michx. Fl. ii. 99, and /;. Imvifjatam, Torr. Cat. PI, N. Y. The best marked of 

 the variations are tlie following. 



Var. maoulatum, Dael. Common in open ground, 3 or 4 feet high, often rougliish- 

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

 florescence more compact and depressed. — Fl. Cest. 453 ; Torr. & Gray, 1. c. E. marnlnlum, 

 L. 1. c. E. fusco-riibnim, Walt. Car. 199 "> E. piinctatum, Willd. Euum. ii. 853. E. dalniim, 

 Poir. Suppl. ii. 606. — ■ Tlie most widely distributed form. 



Var. amdenum. Leai es opposite or at most 3-4-nate, ovate or oblong, smoothish : 

 . stem slender, 2 feet high : heads fewer and only 3-5-flowered. — E. ammnum, Pursh, 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 only two lengths, the 

 outer successively shorter. — § Subimbricata, DC. 



-1— Heads as many as 20-flowered, large (about half-inch long) ; bracts of the involucre of 4 or 5 

 lengths, striate-nervose iu the way of Brichellia : perennial herbs, of a Mexican type. 



•H- Leaves entire, tomentose heneath. 



B. Bigelovii, Geay. Cinereous-pnhescent, paniculately branched : leaves all opposite, 

 ovate-lanceolate with a rounded or obscurely cordate l)ase, acute, entire, short petioled, 

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

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

 outer bracts o-\ate-lanceolate, acute, coriaceous, the innermost linear : flowers purplish : 

 akenes nearly glabrous. — Bot. Mex. Bound. 75. — Arizona, on the Gihi, Bigdow. 



-H- -H- Leaves acutely serrate, narrowed at the pinnately veined base, very short-petioled. 



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

 o^ate-oblong, acute, loosely veiny (2 or 3 inches long) : paniculate rather sleuder 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 scarious and 

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

 Itocky Mountains at Fort Collins, N. Colorado, Dr. Bnmer. *" 



-H- -h+ -H- Leaves coarsely and often obtusely dentate, 3-5-ribbed at the cordate or sometimes trun- 

 cate dilated base, slender-p3tioIed, thin, bright greeen, acute or acuminate; flowers white or 

 whitish; bi-acts of the campanulate involucre conspicuously striate-ncrved; akenes minutely 

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



E. Pendleri, Geay. A foot or two high, leafy, obscurely puberulent ; leaves opposite or 

 the upper alternate, deltoid-subcordate, tapering gradually to an acute or acuminate point; 

 heads comparatiiely small and numerous, paniculate, all peduncled ; bracts of the involucre 

 ' all obtuse, the outer oblong. — Proc. Am. Acad. xvii. 205. Brickellia E,-n(Veri, Gray, PI. 

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

 connect this with /j'//'7.v///».) —Mountains of New Mexico and Arizona, Eendler, Wright, 

 (f'rep/U', Lcunnoii, Riishtj. 



B. Parryi, Ge.vy. Hirsutely pubescent (the spreading hairs of the stem somewhat glandular 

 and viscid), loosely branched ; lea\ rs (so far as known) alternate, broadly ovati' and rather 

 , deeply cnrilate, crenately dentate: heads rather fe^v and large in an open naked jianicle, 

 slender-])cduncnlate; bracts of the involucre thin, oblong-lancenlate, acuminate, the inner- 

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

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



-1- -i- Heads :i-t)-flnwcrod, small (only 2 or 3 lines long), paniculate: leaves (at least (he lower) 

 pinnately dissected, many of tlicm alternate : involncral bracts to 10, narrow, acute or abruptly 

 pointed, nariowly scarious-margined, nervidess: flowers white or whitish; herbs voiv leafy, 

 much branched, with habit of Conyza and Arlanifhi. 



