100 COMPOSITE. Eupatorium. 



base; some of them alternate. E. truncatum, Muhl. in Willd. Spec. iii. 1751. E. salvice- 

 folinin, Sims, Bot. Mag. t. 2110. With the normal form. 



Var. CUneatum, EXGELM. (E. cuneatum, Engelm. iia Torr. & Gray, 1. c.), with 

 smaller leaves narrowed as well as disjoined at base, and fewer-flowered heads, has the 

 appearance of being a hybrid between E. semiserratum and E. perfoliatum. Eastern Ar- 

 kansas and Missouri, Engelmann. Also Louisiana, Hale, a form between this state and the 

 preceding. 



E. resinosum, TORR. Puberulent, glutinous with resinous atoms : stem slender, 2 or 3 

 feet high, fastigiate-corymbose at summit : leaves linear-lanceolate (4 to G inches long, 4 to 6 

 lines wide), half-clasping or slightly connate, finely serrate, glabrate above, canesceut beneath ; 

 cymules numerous in compound cymes: bracts of the 10-15-flowered involucre narrowly 

 oblong, obtuse. DC. Prodr. v. 176; Torr. & Gray, Fl. ii. 88. Wet pine barrens, New 

 Jersey, where it was first collected by Bartrurn. 



-1 -j. i- 1 Heads 24-30-flowered, hartllv over 2 lines long: bracts of the involucre of three 



lengths, obtuse, thin, conspicuously few-nerved: babit of the following section. 



E. pycnocephalum, LLSS. Pubescent or nearly glabrous : stems slender, erect or spread- 

 ing from a perennial root, a foot or two high : leaves membrauaceous, deltoid-ovate or sub- 

 cordate, acute or acuminate, coarsely serrate or dentate, sleuder-petioled : cymes small and 

 compact, solitary or corvmbosely clustered at the end of naked branches : heads very short- 

 pedicelled : involucre campanulate ; the bracts mostly glabrous, oblong and oblong-linear, 

 very obtuse ; innermost equalling the white flowers. Less, in Linn. vi. 4G4. E. Schiede- 

 uniii/t, Sclirad. Ind. Sem. Hort. Goett. 1832, 3; DC. Prodr. v. 159. E. innltlncrve, Beuth. 

 PI. Hartw. 76. E. Sonora, Gray, PI. Wright, ii. 76. Rocky ravines, S. Arizona and along 

 the Mexican borders of Texas; a form with small and deeply dentate leaves, and compara- 

 tively few and small heads. E. Schiedeanum, var. grosse-dentatum, Gray, Bot. Mex. Bound. 

 76. '(Mex., &c.) 



* * * Involucre (campanulate or oblong) of bracts all of the same length or nearly so, in one or 

 two series, or with only a few accessory and shorter ones at base: leaves mainly opposite, 

 petioled. Eximbricata, DC. 



i Shrubby, freely branched: flowers white, sometimes purplish-tinged. 



E. "Wrightii, GRAY. Afoot or two high, puberulent : branches very leafy: leaves small 

 (half-inch long), ovate, obtuse, entire or obscurely few-toothed, thickish, scabrous, abrupt ly 

 contracted into a short margined petiole : heads (3 or 4 lines long), about 12-flowered, rather 

 few in a somewhat leafy terminal cyme : involucre half the length of the flowers, of about 

 10 oblong-lanceolate acute or obtusish greenish obscurely 3-uerved and equal bracts in a 

 double series, sometimes one or two small accessory ones. PI. Wright, i. 87, ii. 73. 

 Guadalupe Mountains, western borders of Texas, Wright. 



E. villosum, SWARTZ. Shrub 4 to 6 feet high, rusty-pubescent: leaves ovate or somewhat 

 deltoid, rather obtuse, sparingly serrate or some entire, tomeutulose beneath (1 to 3 inches 

 long), on short slender petioles : heads small (2 or 3 lines long), 8-15-flowered, numerous and 

 crowded in corymbiform cymes : involucre half the length of the fully developed flowers, of 

 8 to 10 oblong-lanceolate obtuse and nerveless equal bracts. DC. Prodr. v. 172; Chapm. 

 Fl. 196. E. Cubcnse, DC. 1. c. ? S. Florida, Blodtjctt, Garber, Curtiss, &c. ( W. Ind.) 



E. ageratifolium, DC. Shrub 3 to 7 feet high, with slender and spreading mostly herba- 

 ceous branches, green and nearly glabrous : leaves deltoid-ovate, obtusish or obtusely acumi- 

 nate, coarsely and rather obtusely dentate (2 or 3 inches long), slender-petioled : heads 

 (5 lines long), pedicelled, numerous in corymbiform cymes, 10-30-flowered : involucral bracts 

 8 to 12, narrowly lanceolate or linear, acutish, greenish, nerveless above, somewhat 2-ribbed 

 at base. Prodr. v. 173; Torr. & Gray, Fl. ii. 90 (var. Te.rci/se, which does not differ); 

 Gray, PI. Lindh. ii. 219; Griseb. Fl. W. Ind. 360. E, Bf-r/tmdn-ri, DC. 1. c. 167. E. Lind- 

 heimeriannm, Scheele in Linn. xxi. 599. Bulbostyf.is deltoides, Buckley in Proc. Acad. Philad. 

 1861, 456. Kocky shaded hills and ravines, Texas, Lindhf.lint-r, Wright, &c. ; fl. Nov. to 

 May. (W. Ind., Mex.) 



-1 H Herbaceous perennials, or the first species barely lignesccnt at base. 

 -H- Corolla wholly glabrous even in the bud. 



E. OCCidentale, HOOK. Minutely puberulent, glabrate : stems 8 to 20 inches high, strict, 

 simple or with few ascending branches : leaves ovate with truncate base, rarely subcordate 



