204 COMPOSITES. (composite family.) 



acute herbaceous tips ; raya pale blue or purplish. — Georgia and South Caro- 

 lina. — Stem l°-4° high. Leaves thickish, the lowest 5' -6' long. Heads 

 sometimes 1' in diameter. 



35. A. longifolius, Lam. Stem nearly smooth, corymbose-panicled 

 above : leaves long, lanceolate, acuminate, shining above, the lowest narrowed 

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

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

 and subulate, or broader and abruptly pointed spreading tips ; rays purplish- 

 blue. — Swamps, Georgia, and northward. — Stem 1° - 3° high. Leaves 3'- 6' 

 long. Heads showy. 



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

 bose-branched ; the branches short and pubescent in lines ; leaves large, oblong- 

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

 lowest Bpatulate-oblong, obtuse, ercnate ; heads eorymbed at the ends of the 

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

 pale purple. (A. puniceus, Ell.) — Swamps, Florida to North Carolina. — 

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



37. A. puniceus, L. Stem hispid, panicled above ; leaves lanceolate or 

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

 clasping at the base ; scales of the involucre linear-subulate, in about two rows ; 

 rays numerous and showy. — Swampy thickets along the mountains of North 

 Carolina, and northward. — Stem 3° -5° high, commonly purplish. Kays 

 violet-purple. 



38. 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 

 northward. — Stem I - 3° high. Leaves thin, 5'-G' long. Rays pale pur- 

 ple. 



######## Leaves lanceolate, or olilong, entire, sessile or clasping: heads 



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



green summits: rays numerous, showy. 



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



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



very large, Botftary, terminating the brandies; scales of the involucre rigid ; the 



outer ones with obtuse spreading tips, the inner erect, acute ; rays violet. (A. 



ClliatUS, Wait. f) — Dry soil in the upper districts. — Stem 2°-3° high. Leaves 



l i -2'long. Ibads [/ in diameter. 



40. A. Curtisii, Ton-. & Gray. Smooth throughout; stem Bimple, slen- 

 der; leaves membranaceous, lanceolate, entire or Blightly serrate, acuminate, 



; heads in a simple or slightly compound terminal raeeme ; scales of tho 



involucre linear-spatulate, coriaceous, the green and spreading tips barely acute; 



ray. purple, — Mountains of North Carolina. — Stem 2°-3°*high Leaves 

 3'-4'long Heads J'-f in diameter. 



