COMTOSITJE. (COMPOSITE family.) 193 



14. L. paniculata, Willd. Stem vi6cid-pnbescent ; leaves Bmooth; the 

 lowest spatulate-lanceolate, the upper lanceolate, sessile, small ; heads mostly 5- 

 flowered, in small lateral and terminal corymbs, forming a dense oblong panicle. 



— Damp pine barrens, Florida to North Carolina, and westward. .Sept. and 

 Oct. — Stem l°-2° high. 



15. L. fruticosa, Nutt. Stem shrubby, smooth ; branches naked above; 

 leaves ohovate, not ribbed, the lowest ones opposite; heads corymbose, 5-flow- 

 cred ; scales of the involucre lanceolate, acute, dotted. — East Florida. — Leaves 

 1' long. 



10. KUHNIA, L. 



Heads 10-25-flowcred. Flowers all similar and perfect. Scales of the in- 

 volucre few and loosely imbricated in 2-3 rows. Receptacle naked. Corolla 

 slender, 5-toothed. Achenium cylindrical, many-striate. Pappus a single row 



of strongly plumose bristles. — A perennial herb, with lanceolate or linear dotted 

 leaves, and heads of yellowish-white flowers in panicled corymbs. 



1- K. eupatorioides, L. Stem pubescent, or somewhat viscid, mostly 

 branched; leaves toothed or entire, pubescent, or smoothish beneath, the lower 

 ones sometimes opposite ; corymbs loose or crowded. (K. Critonia, and K. glu- 

 tinosa, Ell.) — Light and dry soil, Florida to Mississippi, and northward. Sept. 



— Stem 2° - 4° high. 



11. BRICKELLIA,' Ell. 



Heads few- or many-flowered. Scales of the involucre linear, imbricated, the 

 outer ones shorter. Receptacle flat, naked. Corolla 5-toothed. Achenia cylin- 

 drical, 10-striate. Pappus a single row of bearded bristles. — Perennial herbs, 

 with dotted opposite 3-ribbed leaves, and large heads of pale purple flowers, in 

 terminal corymbs. 



1. B. COrdifolia, Ell. Stem erect, tomentose, mostly branching; leaves 

 ovate, serrate, mostly cordate, petioled, the upper ones often alternate ; heads 

 large, 30-40-flowcred ; achenia nearly smooth. — Light rich soil, Western Geor- 

 gia and Florida, and westward. Aug. — Stem 2° - 4° high. Flowers showy. 



12. EtTPATORIITM, Toum. Tiiorotighwort. 



Heads 3 - many-flowered. Involucre cylindrical or bell-shaped, the scales in 

 a single row, or imbricated in 2-several rows. Receptacle flat, naked. Corolla 

 5-toothed. Achenia 5-angled, the sides smooth and even. Pappus a single row 

 of slender rough bristles. — Perennial and mostly resinous-dotted herbs, with 

 opposite or whorled leaves, and white or purplish flowers. 



§ 1 . Heads corymbed. 

 * Scales of the cylindrical involucre numerous, closely imbricated in several rows, the 

 outer ones shorter : heads few- or many-flowered : hares chiefly opposite. 

 1. E. ivsefolium, L. Herbaceous; stem (3° -5°) erect, terete, rough- 

 hairy, at length much branched ; leaves lanceolate, acute at each end, nearly 

 17 



