Eupatorium. COMPOSITE. 97 



•H- Very numerous heads in corymboselj' paniculate cymules, 5-9-flowered. 

 E. pinnatifidum, Ell. Pubescent, 3 or 4 feet hiij,li . cauline leaves mainly opposite, 

 sometimes 4-nate ; lower 2-3-piunatcly parted and incised into oblong or lanceolate divisions 

 and lobes ; upper once or twice parted into linear lobes : involucral bracts obtuse with a 

 mucronate cusp. — Sk. ii. 295 ; DC. Prodr. v. 176 (not of 149, which is the earlier E. hrunii- 

 folium. Hook. & Am., & E. pinnntijissum, Buek.) ; Torr. & Gray, 1. c. 83. — Low grounds, 

 near the coast, N. Carolina to Florida. 



++ -H- Very numerous heads racemosely and thjTsoidly paniculate, 3-G-flowered: autumnal. 



B. coronopifolium, Willd. Puberulent and sometimes pubescent, somewhat glutinous 

 and balsamic-aromatic, 3 or 4 feet high : lower leaves more commonly opposite, twice 3-7- 

 parted into linear entire or sparingly incised lobes ; upper less compound, uppermost often 

 entire, from broadly to narrowly linear : heads from over 2 to 3 lines long, in close spiciform 

 panicles which are usually collected in an oblong thyrsus. — Spec. iii. 1750; DC. I. c. 176 ; 

 Torr. & Gray, 1. c. 83. E. compositi/olium, Walt. Car. 199. E. racemosum, Bertol. Misc. 

 V. 26, t. 1, from specimen with upper cauline and rameal leaves all entire. — Chrysocoma 

 coronopifolia, Michx. Fl. ii. 102. — Sandy or dry soil, N. Carolina to Florida and Texas. 

 Narrow-leaved forms too nearly approach the next. 



E. foeniculaceum, Willd. 1. c. (Dog-Fennel.) Herbage fennel-scented when bruised, and 

 slightly acrid : stem villous below with many-jointed slightly viscid hairs, 4 to 10 feet high, 

 extremely leafy ; leaves mostly glabrous, nearly all alternate, more compound than of the 

 preceding and the lobes very narrowly linear or filiform : heads 2 lines long, loosely race- 

 mose-paniculate at the ends of the upper branches. — E./miiculoides, Walt. 1. c. E. lepto- 

 pJujllum, DC. 1 c. Artemisia procerior, etc., Dill. Elth. i. 38, t. 37. A. capillifolia, Lam. 

 Diet. i. 267. Mikania artemisioides, Cass. Diet. Sci. Nat. liv. 130. Tragantlies, Wallr. Sched. 

 Crit. i. 456, e.x Cass. 1. c. — Moist pine barrens and low fields, common from N. Carolina to 

 Florida. The varieties, glabrum and lateriflorum, Torr. & Gray, FL, have no permanence. 

 E. leptojihi/I/iun, DC, is only the more slender form. (W. Ind.) 



-1^ -1— H— Iloads 3-15-flowered, 3 to 5 lines long: leaves undivided: flowers white (I'arely pur- 

 plish): involucre of rather few (8 to 12 or rarely 15) bracts. 



++ Thyrsoid-paniculate, suffruticose: involucral bracts 3-nerved. 

 E. SOlidaginifolium, Gray. A foot or two high, with simple branches, glabrate or 

 minutely pubescent : leaves opposite, very short-petioled, oblong- or narrowly ovate-lance- 

 olate from a rounded base, acute, entire or obscurely dentate, 3-nerved at or near the base, 

 10 to 18 lines long : thyrsus small (2 or 3 inches long), leafy at base, oblong or interrupted : 

 heads few and crowded in each short-pedunculate cymule, 3-5-flowered : involucral bracts 

 about 8, almost in two ranks, linear-lanceolate, acute : akenes pubescent. — PI. Wright, i. 87, 

 & ii. 74. — Dry hills between the Limpio and the Rio Grande in W. Texas, and near Santa 

 Cruz, Arizona, Wright, Pringle, &c. 



++ ++ Corymbosely cj'mose or fastigiate inflorescence: hoi'bacoous perennials, mostly copiously 

 resinous-atoniiferous, some species becoming balsamic-glutinous: involucral bracts nerveless or 

 nearly so. 



= Leaves conspicuously petioled from a mostly truncate or abrupt base, strongly serrate: c^-nies 

 broad: involucre cinereous-pubescent. 



E. mikanioides, Chapm. Tomentose-pul)escent when young, soon glabrate : stems simple, 

 a foot or two high from a creeping base : leaves opposite, deltoid-ovate or the uppermost 

 oblong, obtuse, thickish and rather fleshy, glandular-punctate, obtusely dentate (an inch or 

 two long) : heads 5-flowered : involucral bracts linear, rather obtuse. — Fl. 195. E. crassi- 

 folium, Shuttleworth in distrib. coll. Rugel. — Low and sandy ground, coast of Florida, 

 Chapman, Rugd, &c. 



B. serotinum, Micnx. Puberulent : stems 5 to 7 feet high, corymbosely branched above : 

 leaves oiilong- or ovate-lanceolate, acute or acuminate, thinnish, acutely serrate (3 to 6 inches 

 long), many of the upper alternate, some of these cuneate at base : heads 7-1 5-flowered, very 

 numerous: involucral bracts (10 or 12) linear-oblong, very obtuse. — Fl. ii. 100; Torr. & 

 (Jray, Fl. ii. 89. E. amhigunm, Hook. Comp. Bot. Mag. i. 96, as to ' Covington ' plant, is either 

 this species or a (hybrid ?) form between it and E. semiserratum, DC, the E. parrlflorum, 

 lill. — Low grounds, Maryland to Iowa, Florida, and Texas ; Sept. to Nov. (Adj. Mex.) 



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