Ettpatorium. COMPOSIT^E. 97 



■H- Very numerous heads in corymbose!}' paniculate cymules, 5-9-flowered. 

 B. pinnatifldum, Ell. Pubescent, 3 or 4 feet lii-h . cauline leaves mainly opposite, 

 sometimes 4-iiate ; lower 2-3-piuuately parted and incised into oblong or lanceolate divisions 

 and lobes ; ui>per once or twice parted into linear lobes : iuvolucral bracts obtuse with a 

 mucronate cusp. — Sk. ii. 295 ; DC. Prodr. v. 17G (not of 149, whicli is the earlier E. hnmii- 

 f'oliiim, Hook. & Arn., & E. piniiatijissuin, Buck.); Torr. & Gray, 1. c. 83. — Low grounds, 

 near tlie coast, N. Carolina to Florida. 



-H- -:-+ Very numerous heads racemosely and ihyrsoidl\- paniculate, S-G-flowercJ: autumnal. 



E. COronopifolium, Willd. Puberuleut and sometimes pubescent, somewhat glutinous 

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

 parted into linear entire or sparingly incised lobes ; upper less compomid, u])permost often 

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

 panicles which are usually collected iu an oblong thyrsus. — Spec. iii. 1750; DC. 1. c. 17G ; 

 Torr. & Gray, 1. c. 83. E. compositifollum, Walt. Car. 199. E. raccmosum, Bertol. Misc. 

 V. 20, t. 1, from specimen with upper cauline and rameal leaves all entire. — Chr/jsoi-oma 

 coronop'/olia, Miclix. Fl. ii. 102. — Sandy or dry soil, N. Carolina to Florida and Texas. 

 Karrow-leaved forms too nearly approach the next. 



E. foeniculaceum, Willd. 1. c. (Dog-Fexxel.) 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.fcenicidoidcs, Walt. 1. c. E. lepto- 

 pltijUum, DC. 1 c. Artemisia proccrior, etc.. Dill. Elth. i. 38, t. 37. A. cnpillifoUn, Lain. 

 Diet. i. 267. Mikania artemi si aides, Cass. Diet. Sci. Nat. liv. 130. Trafjanihcs, Vs'allr. Sclied. 

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

 Florida. The varieties, glahrum and lateriflornm, Torr. & Gray, FL, have no permanence. 

 E. Icjjtoplii/llum, DC., is only the more slender form. (W. Ind.) 



-(— -i— -i— Ilfnds .Vly-ildwcved, ■'] to 5 lines long: leaves undivided: flowers wliite (rarely pur- 

 plish): ioMilucrc of rather few (K to 12 or rarely 15) bracts. 



•H- Thyrsoid-paiiiculate, suffruticose: iuvolucral bracts 3-nerved. 

 E. SOlidaginifolium, Gray. A foot or two high, M'ith 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-iiervod 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-tlowered : iuvolucral bracts 

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

 &, ii. 74. — Jivy hills between the Limpio and the Eio Grande iu W. Texas, and near Santa 

 Cruz, Arizona, Wright, Primjle, &c. 



++ ++ Corymbosely cymose or fastii^iate inflorescence: herbaceous poreiinials, mostly copiously 

 resinous-atomiferous, some species becoming balsauiic-glutiuous: iuvolucral bracts nerveless or 

 nearly so. 



= Leaves conspicuously petioled fi'om a mostly truncate or abrupt base, strongly serrate: cymes 

 broad: involucre cinereous-pubescent. 



E. mikanioides, Ciiapm. Tomentose-pubescent when young, soon glabrate : stems simple, 

 a fo(jt 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 : iuvolucral bracts linear, rather obtuse. — Fl. 195. E. crassi- 

 foliurn, Shuttleworth iu distrib. coll. Kngel. — Low and sandy ground, coast of Florida, 

 Chapman, Riujil, &c. 



E. serotinum, Micnx. Puberuleut : stems 5 to 7 feet high, corymbosely branched above : 

 leav(!s oblong- or ovate-lanceolate, acute or acuminate, thinnish, acutely serrate (3 to 6 inches 

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

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

 Gray, Fl. ii. 89. E. amhiguiivi, Hook. Comp Bot. Mag. i. 96, as to ' C'ovington ' plant, is either 

 this species or a (hybrid 1) form between it and E. semiserratum, DC, the E. parviflorum. 

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



7 



