216 COMPOSITE. (COMPOS1TK FAillLV.) 



22. E. villosum, Swartz. Stem tomentose, branching ; leaves short- 

 petioled, ovate, obtuse or mucronate, rusty-pubescent, denticulate or entire, 

 3 ribbed; corymb dense; heads 10-1 5-flowered ; scales of the involucre about 

 10, equal, linear, obtuse, shorter than the flowers; anthers slightly exserted ; 

 achenia hispid; pappus shorter than the flowers. South Florida. Leaves 

 rigid, 1'- H' long. 



* * * Scales of the involucre (green) equal, in <i sin<//r. ro/r : heads 8 - 3Q-j1ow- 

 ercd : leaves, achenia, etc. not resinous-dotted: leaves on slender pt-tioles. 



23. E. ageratoides, L. Smooth ; leaves thin, ovate or slightly cordate, 

 acuminate, coarsely and sharply serrate, 3- ribbed ; heads 10-20-flowered ; 

 scales of the involucre linear, acutish, slightly pubescent : aphonia smooth. 

 Rich shaded soil. Sept. Stem commonly branching, 2 -3 high Leaves 

 3' - 5' long. Flowers white. 



24. E. aromaticum, L. Pubescent; leaves thickish, ovate, or the low- 

 est cordate, creuate-serrate, roughish, on short petioles, barclv acute; heads 

 8 - 1 5-flowered ; scales of the involucre linear ; achenia smooth. Drv open 

 woods, common. Sept. Stem 2 high. Leaves T-2' long. Flowers 

 white. 



25. E. incisum. Stem long, slender, smoothish, branching; leaves 

 small, ovate, tapering to the obtuse apex, abruptly contracted at base, coarsely 

 and unequally serrate, 3-nerved, twice as long as the very slender petioles; 

 corymbs loose, compound, pubescent; heads 12-14-flowered ; corolla white, 

 aclieuium slightly pubescent. Clear Water Harbor and Manatee, Florida. 

 Nov. Stem 2 -3 long. Leaves 1' 1^' long. Flowers very fragrant. 



26. E. incarnatum, Walt. Pubescent; stem slender, reclining, diffusely 

 branched; leaves on long petioles, deltoid, acuminate, truncate or cordate at 

 the base, coarsely serrate ; corymbs numerous, small ; heads about 20-flowered ; 

 scales of the involucre linear, acute, 2-ribbed ; achenia hispid. Rich shaded 

 soil, Florida to North Carolina. Sept. Stem 2 -4 long. Leaves l'-2' 

 long. Flowers pale purple. 



3. Scales of the involucre nearly equal, imbricated in 2-3 rows: heads mnnt/- 

 JJoicered : receptacle conical, naked. CONOCLINIUM. 



27. E. CCelestinum, L. Smoothish ; leaves deltoid-ovate, the lowest 

 often cordate, acuminate, coarsely serrate; heads 30 - 60-flowered ; flowers 

 bluish purple. Rich soil. Sept. Stem 2 high. 



14. MIKANIA, Willd. 



Heads 4-flowered. Scales of the involucre 4. Receptacle naked, flat. 

 Anthers partly exserted. Corolla, acheuia, etc. as in Eupatorium. Chiefly 

 climbing herbs, with opposite mostly cordate leaves, and whitish flowers. 



1. M. SCandeDS, Willd. Smooth or pubescent ; leaves on slender peti- 

 oles, acuminate, toothed or entire ; corymbs numerous, on short axillary 

 branches or peduncles ; scales of the involucre linear, acu-te ; achenia minutely 

 glandular. Swamps. August - Sept. Stem twining. 



