COMPOSITE. (COMPOSITE FAMILY.) 223 



# 7. Leaves lanceolate, or oblong , sessile, the upper oiies more or less clasping: 



heads large or middle-sized: scales oj'the involucre ncarli/ equal, with spread- 

 ing i/ret-n tips : rai/s mostly large and numerous, b'ue or pur/ile. 



32. A. Novi-Belgil, L. Stem nearly smooth, corymbose-paiiicled above ; 

 leaves long, lanceolate, acuminate, shilling above, the lowest narrowed at the 

 base, and serrate in the middle, the upper sessile or partly clasping; heads 

 solitary or few on the rigid branchlets ; scales of the involucre linear, with 

 green and subulate, or broader and abruptly pointed spreading tips ; rays 

 purplish blue. Swamps, Georgia, and northward. Stem l-3 high. 

 Leaves 3' - 6' long. Heads showy. 



33. A. Elliottii, Torr. & Gray. Stem stout, smooth, very leafy, corym- 

 bose-branched ; the branches short and pubescent iu lines ; leaves large, ob- 

 long-lanceolate, acute, serrate, narrowed toward the base, and partly clasping ; 

 the lowest spatulate-oblong, obtuse, eremite ; heads corymbed at the ends of 

 the branches ; scales of the involucre subulate, with long and spreading tips ; 

 rays pale purple. (A. puuiceus, Ell.) Swamps, Florida to North Carolina. 



Stem 2 -3 high. Leaves 4' - 6' long, or the lowest 1 long. 



34. A. puniCGUS, L. Stem hispid, panic-led above ; leaves lanceolate or 

 oblong-lanceolate, acuminate, sharply serrate, very rough above, auriculate 

 and clasping at the base ; scales of the involucre linear-subulate, iu about two 

 rows; rays numerous and showy. Swampy thickets in the upper districts. 



Stem 3 -5 high, commonly purplish. Kays violet-purple. 



Var. laevicaulis, Gray. Stem smooth, green ; branches pubescent ; 

 leaves wider and smoother. Bauhs of the Coosa Kiver, Rome, Georgia. 



35. A. prenanthoides, Muhl. Stem pubescent in lines, corymbose at 

 the summit; leaves ovate-lanceolate, acuminate, sharply serrate in the middle, 

 contracted into a broadly winged petiole, which is dilated and clasping at the 

 base, rough above ; scales of the involucre narrow-linear, imbricated in 3-4 

 rows, with spreading green tips. Damp woods, North Carolina, and north- 

 ward. Stem 1 - 3 high. Leaves thiu, 5' - 6' long. Kays pale purple. 



* 8. Leaves lanceolate or oblong, entire, sessile or claspinq : heads large, in 



corymbs or racemes : scales of the involucre numerous, with spreading green 

 summits : rays numerous, showy. 



36. A. grandiflorus, L. Stem rigid, rough with bristly hairs, sparingly 

 branched ; leaves small, linear-oblong, sessile, hispid, commonly reflexed ; 

 heads very large, solitary, terminating the branches ; scales of the involucre 

 rigid ; the outer ones with obtuse spreading tips, the inner erect, acute ; ravs 

 violet. Dry soil in the upper districts. Stem 2-3 high. Leaves l'-2' 

 long. Heads 1' in diameter. 



37. A. Oblongifolius, Nutt. Stem hirsute, corymbosely branched, very 

 leafy ; leaves oblong-lanceolate, closely sessile, acute, scabrous above ; heads 

 terminating the short branchlets, single or corymbose ; scales nearly equal, 

 glandular ; rays violet-purple ; achenia pubescent. Kocky banks, Tennessee, 

 and northward. Stem 1- 2 high. Leaves 1'- 2' long. 



38. A. Carolinianus, \Valt. Stem shrubby, long and trailing; the 

 branches and leaves closely pubescent ; leaves short, oblong, acute, abruptly 



