204 COMPOSITA. (COMPOSITE FAMILY.) 
acute herbaceous tips ; rays pale blue or purplish. — Georgia and South Caro- 
lina. — Stem 1°-4° high. Leaves thickish, the lowest 5/- 6 long. Heads 
sometimes 1' in diameter. eB 
35. A. longifolius, Lam. Stem nearly smooth, corymbose-panicled 
above ; leaves long, lanceolate, acuminate, shining 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 19 - 39 high. Leaves 3'-6' 
long. Heads showy. T 
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 spatulate-oblong, obtuse, crenate ; heads corymbed 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. ae 
37. A. puniceus, L. Stem hispid, panicled above; leaves lanceolate OF 
oblong-lanceolate, acuminate, sharply serrate, very rough above, auriculate anl : 
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 30-50 high, commonly purplish. Rays 
violet-purple. 1 
38. A, prenanthoides, Muhl. Stem pubescent in lines, corymbose “ 
the summit; leaves ovate-lanceolate, acuminate, sharply serrate in the middle, zt 
contracted into a broadly winged petiole, which is dilated and clasping " Ae 
the base, rough above; scales of the involucre narrow-linear, imbricated in "A 
3-4 rows, with spreading green tips. — Damp woods, North Carolina, and. p 
northward. — Stem 19-39 high. Leaves thin, 5/-6' long. Rays pale mS 
ple. Wc: 
*CE CE GE E 3 n x Leaves lanceolate or oblong, entire, sessile or clasping : heads 
large, in corymbs or racemes: scales of the involucre numerous, with spreading 
green summits: rays numerous, showy. ; Eu 
39. 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 
. 0. A. Curtisii, Torr. & Gray. Smooth throughout; stem simple, se 
der; leaves membranaceous, lanceolate, entire or slightly serrate, pum 
sessile ; heads in simple or slightly compound terminal raceme ; scales of ! * 
in diameter. - 
