98 COMPOSITE. Ewpatorivm. 



= = Leaves from linear to oblong, sessile or some short-petioled from a narrowed base, chiefly 

 opposite : heads mostly 5-flowered, occasionally 6-7-flowered. 



a. Involucral bracts with conspicuous white-scarious acute tips; the inner equalling the flowers. 



E. album, L. Pubescent with jointed spreading hairs: stem 2 feet high: leaves oblong- 

 lanceolate or narrowly oblong, commonly obtuse, coarsely serrate, veiny, sessile (2 to 4 inches 

 long) : cymes fastigiate : involucre (4 or 5 lines long) mostly bright white and glabrous 

 throughout, well imbricated ; its bracts slender-mucronate, the outer sometimes pubescent 

 and dark-dotted with resinous globules. — Mant. Ill; Walt. Car. 199. E. glandulosum, 

 Michx. Fl. ii. 98. E. stigmatosum, Bertol. Misc. v. 15, t. 5. — Sandy fields and pine barrens, 

 Long Island, N. Y., and Penn. to Florida and Louisiana. 



Var . subvenosum. More minutely roughish-pubescent : leaves smaller, only an inch 

 or two long, mostly acute, with smaller and more appressed serratures, less veiny and more 

 manifestly 3-nerved at base, where the upper cauline are not narrower : involucral bracts not 

 so white. — Long Island (E: S. Miller) and New Jersey. Burke Co., N. Carolina ? 



B. leucolepis, Tokh. & Gray. Puberulent : stem slender, about 2 feet high : leaves lance- 

 olate or linear, minutely and sparingly appressed-serrate, thickish, obscurely 3-nerved at 

 base, closely sessile (1 to 3 inches long) : involucre (3 lines long) canescently pubescent; the 

 narrowed tips of the bracts white-scarious. — Fl. ii. 84. E. linearifolium, Michx., Pursh, &c, 

 partly. E. hyssopifolium, Ell. Sk. ii. 296 ; Hook. Comp. Bot. Mag. i. 96. E. glaucescens, 

 var. leucolepis, DC. 1. c. 177. — Moist pine barrens, New Jersey to Florida and Louisiana, in 

 the low country. 



b. Involucral bracts obscurely if at all scarious, mostly obtuse, at length shorter than the flowers. 



B. hyssopifolium, L. Merely puberulent : stems about 2 feet high, very leafy, commonly 

 with fascicles in the axils, simple, corymbosely branched at summit : leaves occasionally ver- 

 ticillate, linear, obtuse, entire or sparingly dentate, narrowed at base, f to 2 inches long, the 

 broader forms with lateral nerves : cymes crowded : involucre (3 lines long) canescently 

 pubescent and glandular ; bracts rather few, the inner with somewhat scarious margins and 

 tips, obtuse, sometimes apiculate. — Spec. ii. 836 (Dill. fig. & Pluk.) ; Torr. & Gray, Fl. ii. 

 84. E. linearifolium, Walt. Car. 199; Michx.. 1. c. (partly) ; Willd. 1. c. E. linearifolium & 

 hyssopifolium (chiefly), DC. 1. c. — Dry and sterile soil, Mass. to Florida and Texas, along 

 and toward the coast. Varies greatly in the foliage, the extreme forms being, on one hand, 

 that with very narrowly linear and much fascicled leaves ; on the other, the 



Var. laciniatum. Leaves lanceolate and linear-lanceolate, irregularly and coarsely 

 dentate, even laciniate. — Penn. and Kentucky to Carolina and Louisiana. 



Var. tortifolium. Leaves oblanceolate or spatulate-linear, mostly short, all entire, 

 inclined to be vertical by a twist at base, many of them alternate. — E. tortifolium, Chapm. 

 in Bot. Gazette, iii. 5. E. cuneifolium, A. H. Curtiss, distrib. 1194. — Sandy pine barrens, 

 S. Carolina, Georgia, and Florida. The lower leaves resemble the uppermost of E. cuneifo- 

 lium, but are all entire, often reflexed as well as vertical. 



B. cuneifolium, Willd. Habit, involucre, and pubescence of the preceding : leaves short 

 (half to a full inch long), oblanceolate to cuneate-spatulate, obtuse, glaucescent, few-toothed 

 toward the extremity, or the upper entire, uppermost very small and oblong-linear. — Spec, 

 iii. 1753, excl. syn. (not DC.) ; Torr. & Gray, 1. c. 85 ; Chapm. 1. c. E. linearifolium, Michx. 

 1. c, in part. E. glaucescens, Ell. 1. c. 297 ; DC. 1. c, excl. var. E. hyssopifolium, DC. 1. c, 

 in part. E. cassinifolium, Bertol. Misc. v. 17, t. 6. — Dry ground, South Carolina, Georgia, 

 Alabama, and Florida. 



E. semiserratum^ DC. Tomentulose-pubescent : stems 2 or 3 feet high, much branched 

 above : leaves oblong-lanceolate, mostly acute or acuminate (commonly 2 or even 3 inches 

 long), serrate with numerous unequal teeth from above or below the middle to the apex, 

 triplinerved, rather veiny, narrowed at base, the lower into a short mostly distinct petiole : 

 cymes numerous : heads small : involucre (2 lines long) canescently pubescent, of few bracts ; 

 the longer linear-oblong, very obtuse, the others much shorter. — E. semiserratum & E. cunei- 

 folium, DC. Prodr. v. 177. E. parviflorum, Ell. Sk. ii. 299; Torr. & Gray, 1. c, not Swartz. 

 E. ambiguum, Hook. Comp. Bot. Mag. i. 96 (1835), in part only, the Jacksonville plant, hut 

 heads not " 8-1 0-flowered." — Virginia to Florida, Arkansas, and Texas. In dry and open 

 ground, plants with smaller and firmer leaves pass into 



Var. lancif olium. Glabrate : leaves lanceolate and verging to linear, 5 to 2 lines 



