COMPOSITE. (composite FAMILY.) 195 



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

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

 Stem 2° high. Leaves U' long. 



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

 broadly ovate or roundish, obtusely serrate, roughi.sh, mostly truncate at the base, 

 3-ribl)ed and somewhat rugose ; corymbs large ; scales of the involucre lanceo- 

 late, acute, shorter than the flowers. — Low pine barrens, Florida to North C;».o- 

 lina, and westwai-d. August. — Stem 2° high. Leaves 1' long. 



9 E. teucrifolium, Willd. Tiough-pubesccnt ; leaves ovate or oblon:;- 

 ovate, coarsely serrate and sometimes toothed near the base, 3-ribbed ; t!ic upper 

 onjs small and remote ; corymbs dense, depres.'-ed in the centre ; scales of the 

 iuvolucre lanceolate, mucronate, shorter than the flowers. (E. verbenaefoiium, 

 J//c7(i:.) — Damp soil, Florida and northward. Sept. — Stem virgatc, 2° -3° 

 high. Leaves I'-li' long, the base rounded or truncate. Branches of the 

 corymb alternate. 



10. E. album, L. IJough-pubcscent or Iiairy ; 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, t!ie acuminate or mucronate tips white and scarious. — Dry sandy soil, 

 Florida to Mis.sissippi, and northward. Sept. — Stem l°-2° high. Leaves 2' 

 long. 



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

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

 at t'.ic base ; corymb dense, hoarj' ; 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 tomcntose ; scales of the 

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

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

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



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

 brantthing 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 

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

 Island, West Florida. Sept. — Stem I°-2° high. Leaves I'-l^' long, some- 

 what fleshy. 



-1- •<- Heads &- \Tt-Jlowered : leaves opposite. 

 ++ Leaves sessile or perfoliate. 



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

 lobed or pinnatilid, 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. 



