COMPOSITE. (COMPOSITE FAMILY.) 195 



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



flowers. Low pine ban-ens, Middle Florida to South Carolina. August. 



Stem 2 high. Leaves l' long. 



8. E. rotundifolium, L. Stem pubescent, mostly simple ; leaves short, 

 broadly ovate or roundish, obtusely serrate, roughish, mostly truncate at the base, 

 3-ribbed and somewhat rugose ; corymbs large ; scales of the involucre lanceo- 

 late, acute, shorter than the flowers. Low pine barrens, Florida to North Caro- 

 lina, and westward. August. Stem 2 high. Leaves 1' long. 



9. E. teucrifolium, Willd. Rough-pubescent; leaves ovate or oblong- 

 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. verbenaefolium, 

 Michx. ) Damp soil, Florida and northward. Sept. Stem virgate, 2 - 3 

 high. Leaves l'-l|' long, the base rounded or truncate. Branches of the 

 corymb alternate. 



10. E. album, L. Rough-pubescent or hairy; leaves oblong or lanceolate, 

 narrowed at the base, toothed-serrate, strongly veined ; corymbs dense ; scales of 

 the involucre lanceolate, smooth, or the outer ones pubescent, longer than the 

 flowers, the acuminate or mucronate tips white and scarious. Dry sandy soil, 

 Florida to Mississippi, and northward. Sept. Stem l-2 high. Leaves 2' 

 long. 



11. E. altissimum, L. Stem tomentose; leaves opposite, lanceolate, 

 acute, pubescent, strongly 3-ribbed, sharply serrate above the middle, narrowed 

 at the base ; corymb dense, hoary ; scales of the involucre shorter than the flow- 

 ers, linear-oblong, obtuse. Sterile soil, North Carolina and westward. Sept. 

 Stem 3 - 7 high. Leaves 3' - 4' long. 



12. E. sessilifolium, L. Smooth; leaves long, lanceolate, acuminate, 

 serrate, rounded and closely sessile at the base ; corymb tomentose ; scales of the 

 involucre oblong, obtuse. (E. truncatum, Ell.) Open woods, in the upper dis- 

 tricts, Alabama and northward. Sept. Stem 2 -4 high, mostly branching 

 above. Leaves 3' - 6' long, thin and veiny. 



13. E. mikanioides, n. sp. Stem ascending from a creeping base, 

 branching and tomentose above ; leaves opposite, long-petioled, deltoid, glandu- 

 lar-serrate or toothed, truncate or abruptly acute at the base, resinous-dotted 

 above, pubescent on the veins beneath ; the petioles somewhat connate ; corymb 

 ample; scales of the involucre about 10, lanceolate, acute; anthers slightly 

 exserted ; achenia 5-angled, glandular. Low sandy places, on St. Vincent's 

 Island, West Florida. Sept. Stem l-2 high. Leaves !'-!' long, some- 

 what fleshy. 



*- *- Heads 6 - 15-jlowered : leaves opposite. 

 *-* Leaves sessile or perfoliate. 



14. E. pinnatifidum, Ell. Pubescent; leaves lanceolate, pinnately 

 lobed or pinnatifid, the uppermost linear and entire, the lowest ones whorled ; 

 heads 6 - 9-flowered ; scales of the involucre lanceolate, acute. Dry soil, Flor- 

 ida to North Carolina. Sept. Stem 2 - 3 high. 



