COMPOSITES. (COMPOSITE FAMILY.) 215 



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

 sandy soil. Sept. Stem 1- 2 high. Leaves 2' long. 



14. E. altissimum, L. Stem tomeutosc; leaves opposite, lanceolate, 

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

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

 the flowers, linear-oblong, obtuse. Sterile soil, North Carolina, and westward. 

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



15. E. sessilifoliu.nl., L. Smooth; leaves long, lanceolate, acuminate, 

 si-rrate, rounded ami closely sessile at the base; corymb tomeutose; scales of 

 the involucre oblong, obtuse. Open woods in the upper districts, Alabama, 

 and northward. Sept. Stem 2 -4 high, mostly branching above. Leaves 

 3'- 6' long, thin and veiny. 



16. E. mikanioides, Chapm. Stem ascending from a creeping base, 

 branching and tomeutose above ; leaves opposite, long-petioled, deltoid, 

 glandular-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-augled, glandular. Low sandy places on the 

 coast of West Florida. Sept. Stem l-2 high. Leaves I'-lg' long, 

 somewhat fleshy. 



-t- -i- Heads in panicled racemes, 3 - 5-Jloicered : leaves />innately divided. 



17. E. fceniculaceum, Willd. Stem tall, pubescent, pauiculately much 

 branched ; divisions of the leaves filiform, smooth ; heads 3-5-flowered ; scales 

 of the involucre smooth, margined, notched at the apex, mucronate; achenia 

 smooth. Chiefly in old fields. Sept. -Oct. Stem 3 -8 high. Flowers 

 white. 



IS. E. COronopifolium, Willd. Pubescent; stem paniculately 

 branched ; divisions of the leaves linear ; heads crowded, 5-flowered ; scales of 

 the involucre mucronate, pubescent, margined ; achenia smooth. Dry sandy 

 soil. Sept. -Oct. Stem 2 -4 high. Flowers white. 



t- -i- -i- Heads 6- 15-floicered : leaves opposite. 

 +-* Leaves sessile or per foliate. 



19. 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, 

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



20. E. perfoliatum, L. Pubescent or hairy ; leaves lanceolate, acumi- 

 nate, crenate-serrate, rugose, sessile and clasping at the base, or connate-per- 

 foliate ; heads about 10-flowered : scales of the involucre linear-lanceolate, 

 acute. Low ground. Sept. Stem stout, 2 - 3 high. Leaves 6' - 8' 1< mg. 



-H- -M. Leaves petioled. 



21 . E. serotinum, Michx. Pubescent ; stem tall, mostly branching ; 

 leaves long-petioled, ovate-lanceolate, acuminate, sharply serrate, 3-ribbed ; 

 heads 12- 1 5-flowered ; scales of the involucre linear-oblong, obtuse ; achenia 

 smooth. Rich soil. Sept. Stem 3- 6 high. Leaves 4' - 9' long. 



