100 COMPOSIT/E. Eupatorium. 



base; some of them alternate. — E. truncatum, Miihl. in WilM. Spec. iii. 17.51. E. salvice- 

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



Var. cuneatuill, Engelm. [E. cuneatum, Engelm. iu Torr. & Gra,y, 1. c), with 

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

 appearance of being a hybrid between E. semisenxitum and E. perfoUatum. — Eastern Ar- 

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

 preceding. 



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

 feet higli, 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. 17G; Torr. & Gray, EL ii. 88. — Wet pine barrens, New 

 Jersey, where it was first collected by Burlram. 



H— 4— -i— -)— Heads 24-30-flo.vvered, hardly over 2 lines long: bracts of the involucre of three 

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



E. pycnocepiialum, Li ss. 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-pctioled : 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 tlie white flowers. — Less, in Linn. vi. 404. E. Schiede- 

 amim, Schrad. Ind. Sem. Ilort. Gcctt. 18.32, 3; DC. Prodr. v. 159. E. muitinerve, Benth. 

 PI. Hartw. 76. E. Sonorcv, Gray, PI. Wriglit. ii. 76. — Eocky ravines, S. Arizona and along 

 the Mexican borders of Texas ; a form witli smaU and deeply dentate leaves, and compara- 

 tively few and small Iieads. E. Sch/edeanum, var. (jrosse-deutatum, Gr.iy, 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, 

 petiolcd. — § Exhnhvicata, DC. 



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



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

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

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

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

 10 oblong-lanceolate acute or obtusish greenish ob.scurely 3-nerved and eqiial 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, SwAKTZ. 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), 8-15-fiowered, numerous and 

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

 8 to 10 oblong-lanceolate ol)tuse and nerveless equal bracts. — DC. Prodr. v. 172; Chapm. 

 El. 196. E. Cnhense, DC. 1. c. ?— S. Elorida, Blodyctt, Garber, Curtlss, &c. (W. Ind.) 



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

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

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

 (5 lines long), pedicelled, numerous iu 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. Texense, which does not differ); 

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

 heimerianum, Scheele in Linn. xxi. 599. Bulhosiijh's deltoides, Buckley in Proc. Acad. Philad. 

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

 May. (W. Ind., Mex.) 



•\— -i— Herbaceous perennials, or the first species barely lignescent at base. 

 -H- Corolla wholly glabrous even in the bud. 



E. OCCidentale, Hook. INIinutcly puberulent, ghibrate : stems 8 to 20 inclies high, strict, 

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



