COMrOSIT^E. (cosirosiTE FAMILY.) 235 



* * * Rays 3 - 5-toothed or lobed. 

 -»- Rays yellow : achenia orbicular, broadly winged, warty, and until a tubercle at 

 each end on the inside, 2-toothed: scales of the involucre nearly njunl .- heads 

 bmg-pedunded. 



9. C. auriculata, L. Stem erect, pubescent, commonly branched ; upper 

 leaves oblong or ovate-laneeolatc, mostly entire, nearly sessile ; the lower peti- 

 oled, oval or roundish, entire, or with 2-4 small lateral lobes; exterior scales 

 of the involucre lanceolate; rays 4-toothed. (C. pubescens, Ell.) — Rich shaded 

 soil, West Florida to the mountains of North Carolina. June- Sept. — Stem 

 l°-4°high. Leaves l'-4' long, variously divided on the same plant. Kays 

 showy. 



10. C. grandiflora, Nutt. Stem slender, smooth, ascending ; leaves elon- 

 gated; the lowest linear-spatulate, on long ciliate petioles ; the upper ternately 

 or 1 — 2-pinnately parted, the divisions linear; exterior scales of the involucre 

 ovate-lanceolate ; rays large, 4 - 5-toothed. — Dry soil, Florida and Georgia, and 

 westward. April- June. — Stem 8' -12' high. 



11. C. lanceolata, L. Smoothish; stem short, ascending; leaves undi- 

 vided, thick; the lowest spatulate-oblong on long ciliate petioles; the upper 

 lanceolate sessile ; exterior scales of the involucre ovate-lanceolate ; rays large, 

 strongly 4 -5-toothed. (C. crassifolia, Ait., stem and leaves hairy or woolly.) — 

 Dry rich soil, Florida to North Carolina. May and June. — Stem 6'- 12' long. 



■•- -i- Rays yellow : achenia nearly straight, oblong, 2-awned, the margins with a 

 serrulate or pectinate icing (except JVo. 12) : exterior scales of the involucre shorter 

 than the interior : disk dark purple. 



12. C. Leavenworthii, Torr. & Gray. Smooth; stem dichotomous 

 above ; leaves opposite, linear, entire, or with two lateral lobes ; rays 3-toothed ; 

 achenia with a broad whitish entire wing, conspicuously 2-toothed. — Tampa 

 Bay, East Florida. — Stem slender, l°-2°high. Lower leaves 3' -4' long, 

 1 " wide. Rays 5'' - 6" long. 



13. C. gladiata, Walt. Smooth ; stem terete, naked above, simple, or 

 with few peduncle-like branches ; leaves fleshy, alternate, entire, or rarely 3-lobed ; 

 the lowest ones spatulate-oblong, on long petioles ; the upper small, linear ; 

 heads large ; exterior scales of the involucre small and roundish ; rays showy, 

 4-toothed ; wings of the achenia pectinately toothed. — Low pine barrens, Flor- 

 ida to North Carolina, and westward. Sept. and Oct. — Stem 2° -3° high. 

 Lowest leaves 8'- 10' long. Rays wedge-shaped, 1' long. 



14. C. angustifolia, Ait. Smooth ; stem slender, 4-anglcd, dichoto- 

 mously branched above ; leaves opposite or alternate, linear, obtuse, entire ; the 

 lowest ones spatulate-lanceolatc ; heads small, corymbose ; rays 3-toothed ; wings 

 of the achenia pectinately toothed. — Pine-barren swamps, Florida to North 

 Carolina, and westward. Sept. and Oct. — Stem 2° - 3° high. Leaves some- 

 what fleshy. Rays £' long. 



15. C. integrifolia, Poir. Smooth; stem terete, corymbosely branched 

 above ; leaves opposite, petioled, entire, ovate or oblong, obtuse, the margins 

 scarious and roughish ; heads few, on long peduncles ; exterior scales of the 



