COMPOSITE. (COMPOSITE FAMILY.) 235 



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



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

 each end on the inside, 2-loothed : scales of the involucre nearly equal : heads 

 long-peduncled. 



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

 leaves oblong or ovate-lanceolate, 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. Rays 

 showy. 



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

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

 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 wing (except No. 12) : exterior scales of the involucre shorter 

 than the interior : disk dark purple. 



12. C. Leavenworthii, TOIT. & 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-2high. 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-angled, dichoto- 

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

 lowest ones spatulate-lanceolate ; 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 



