214 COMPOSIT.E. (COMPOSITK FAMILY.) 



at the base ; scales of the involucre lanceolate, obtuse, mucronate, shorter 

 than the flowers. — Varies with the leaves narrow-linear and entire, the lower 

 ones 4 in a wliorl, and numerous smaller ones in the axils. — Low grouud. 

 Sept. — Stciii 2^- .3^ l"i.i,'h. Leaves rigid, sometimes all alternate. 



6. E. CUneifolium, Wiild. rubescent; leaves short, ol)ovate-oblong, 

 sparingly serrate near the summit, or entire, 3-ribbed, mo!<tiy very obtuse; 

 scales of tlie involucre obtu^;e, shorter tliau the flowers. (E. glaucescens, A7/.) 



— Rich shaded soil, Florida to South Caroliua Sept. — Stem 2° - 3° high. 

 Leaves 1' long, i)ale and somewhat glaucous on both sides. 



7. E. leucolepis, Torr. & Gray. Stem simple, virgate, minutely pubes- 

 cent and rougiicued ; leaves somewhat remote, lanceolate or linear-lanceolate, 

 acute, serrate, very rough on both sides, obscurely 3-ribbed; corymbs ample, 

 hoarv ; scales of tiie involucre lanceolate, acuminate, wiiite and scarious at 

 the apex, as long as the flowers. — Flat i)ine barrens. Sei)t. — Stem 2° liigh. 

 Leaves r-2' long. 



8. E. tortifolium, Chapm. Stem pubescent, branching above, 1°-!^° 

 high; leaves small (I'-U' long), oblauceolate, entire, vertical, the upper 

 linear ; heads crowded ; involucral scales erect, acute ; pappus rather rigid, 

 longer tlian the corolla. — Dry pine barrens, Georgia and Florida. Sept. 



9. E. semiserratum, DC. Tomentose; stem slender, simple or 

 branclied ai)ove; leaves alternate, opposite, or whorled, lanceolate, acute, 

 strongly serrate, 3-ribbed near the base, tapering into a petiole ; corymbs 

 large ; scales of the involucre lanceolate, obtuse, shorter than the flowers, 

 scarcely longer than the mature achenia. — Margins of ponds and wet places. 

 Stem 2° liigh. Leaves 2' long, strongly veined. 



10. E. SCabridum, Ell. Stem stout, tomentose ; leaves opposite, ovate- 

 lanceolate, acute at both ends, thickly and unequally serrate, rough above, 

 tomentose and somewhat glaucous beneath, 3-ribbed from near the base ; 

 corvmbs am])le, dense ; scales of tlie involucre lanceolate, cuspidate, shorter 

 than the flowers. — Low pine barrens, Florida to South Carolina. August. 



— Stem 2° high. Leaves H' long. 



11. E. rotundifolium, L. Stem pubescent, mostly simple; leaves 

 short, broadly ovate or roundish, obtusely serrate, roughish, mostly trun- 

 cate at the base, 3-ril)bed and somewhat rugose ; corymbs large ; scales of the 

 involucre lanceolate, acute, sliorter than the flowers. — Low pine barrens. 

 August. — Stem 2° high. Ivcaves 1' long. 



12. E. teucrifolium, Willd. Kough-pubescent ; leaves ovate or ob- 

 long-ovate, coarsely serrate and sometimes toothed near the base, 3-ril)bed ; 

 the upper ones snmll and remote; corymbs dense, depres.sed in the centre; 

 scales of tiie involucre lanceolate, mucronate, shorter than the flowers. (E. 

 verbeuaafolium, Michx.) — Damp soil, Florida, and northward. Sept. — 

 Stem virgate, 2° -3° high. Leaves 1' - 1 1' long, the base rounded or trun- 

 cate. Branches of the corymb alternate. 



13. E. album, L. Rough-pubescent or hairy ; leaves oblong or lanceo- 

 late, narrowed at the base, toothed-.scrrate, strongly veined ; corymbs dense ; 

 scales of the involucre lanceolate, smooth, or the outer ones pubescent, longer 



