214 COMPOSITE. (COMPOSITE 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 whorl, and numerous smaller ones in the axils. Low ground. 

 Sept. Stem 2-3 high. Leaves rigid, sometimes all alternate. 



6. E. cuneifolium, Willd. Pubescent ; leaves short, obovate-oblong, 

 sparingly serrate near the summit, or entire, 3-ribbed, mostly very obtuse ; 

 scales of the involucre obtuse, shorter than the flowers. (E. glaucescens, Ell.) 



-Rich shaded soil, Florida to South Carolina Sept. Stem 2 - 3 high. 

 Leaves 1' long, pale and somewhat glaucous on both sides. 



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

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

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

 hoary ; scales of the involucre lanceolate, acuminate, white and scarious at 

 the apex, as long as the flowers. Flat pine barrens. Sept Stem 2 high. 

 Leaves 1'- 2' long. 



8. E. tortifolium, Chapm. Stem pubescent, brandling above, 1-H 

 high; leaves small (!'- \ long), oblauceolate, entire, vertical, the upper 

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

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



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

 branched above ; 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 high. Leaves 2' long, strongly veined. 



10. E. scabridum, Kll. Stem stout, tomeutose ; leaves opposite, ovate- 

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

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

 corymbs ample, dense ; scales of the involucre lanceolate, cuspidate, shorter 

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

 Stem 2 high. Leaves l' 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-ribbed and somewhat rugose ; corymbs large ; scales of the 

 involucre lanceolate, acute, shorter than the flowers. Low pine barrens. 

 August. Stem 2 high. Leaves 1' long. 



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

 long-ovate, coarsely serrate and sometimes toothed near the base, 3-ribbed; 

 the upper ones small and remote; corymbs dense, depressed in the centre; 

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

 verbeusefolium, Michx.) Damp soil, Florida, and northward. Sept. 

 Stem virgate, 2 - 3 high. Leaves l'-H' 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-serrate, stronglv veined ; corymbs dense; 

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



