100 COMPOSITE. Eupatorium. 



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

 folium, Sims, Bot. Mag. t. 2110. — With the normal form. 



Var. CUneatum, Engelm. (E. cuneatum, Engelm. in 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, Sale, a form between this state and the 

 preceding. 

 B. resinosum, Torr. Puberulent, glutinous with resinous atoms: stem slender, 2 or 3 

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

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

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

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

 Jersey, where it was first collected by Bartram. 



H — -I — -i — n — Heads 2+-30-flowered, hardly over 2 lines long : bracts of the involucre of three 

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



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

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

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

 compact, solitary or corymbosely 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. 404. E. Schiede- 

 anum, Schrad. Ind. Sem. Hort. Gcett. 1832, 3; DC. Prodr. v. 159. E. multinerve, Benth. 

 PL Hartw. 76. E. Sonorce, 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. 



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



B. "Wrightii, Gray. A foot or two high, puberulent : branches very leafy : leaves small 

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

 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-nerved 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, Swaetz. Shrub 4 to 6 feet high, rusty-pubescent : leaves ovate or somewhat 

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

 long), on short slender petioles : heads small (2 or 3 lines long), 8-1 5-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. 

 El. 196. E. Cubense, DC. 1. c. 1— S. Florida, Blodgett, Garber, Curtiss, &c. (W. Ind.) 



B. 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, El. ii. 90 (var. Texense, which does not differ); 

 Gray, PI. Lindh. ii. 219; Griseb. Fl. W. Ind. 360. E. Berlandieri, DC. 1. c. 167. E. Lind- 

 heimerianum, Scheele in Linn. xxi. 599. Bvlbostylis deltoides, Buckley in Proc. Acad. Philad. 

 1861, 456. — Rocky shaded hills and ravines, Texas, Lindheimer, Wright, &c ■ fl Nov to 

 May. (W. Ind., Mex.) 



H 1— Herbaceous perennials, or the first species barely lignescent at base. 



++ 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 



