COMPOSITA. (COMPOSITE FAMILY.) 205 
41. A. Carolinianus, Walt. Stem long and trailing; the branches and 
leaves closely pubescent ; leaves short, oblong, acute, abruptly contracted into a 
short auriculate-clasping petiole ; heads single, or somewhat racemose at the 
. ends of the branches; scales of the involucre narrow-linear, with recurved subu- 
late tips; rays slender, pale purple. — River-swamps, Florida to South Caro- 
lina. — Stem 4°-10° long. Leaves 1/—2! long. 
42. A. Novæ-Angliæ, L. Stem hairy or hispid, corymbose above; 
leaves lanceolate, acute, pubescent, scarcely narrowed at the auriculate-clasping 
base; heads corymbed ; scales of the involucre linear-subulate, loosely imbri- 
cated, viscid ; rays violet-purple. — Upper districts, in low ground, and north- 
ward.— Stem 29-49 high, mostly purple. Leaves 2'-3' long. Heads j'or 
more in diameter, numerous and showy. 
$4. Onrnomerrs.— Scales of the involucre regularly imbricated, scarious on the 
margins, without herbaceous tips: pappus soft-hairy. 
43. A. acuminatus, Michx. Pubescent; stem erect, corymbose above ; 
leaves large, oblong-lanceolate, acuminate, coarsely serrate, tapering at the base; 
heads corymbed, on slender naked peduncles ; scales of the involucre linear- 
lanceolate ; rays white. — Mountains of North Carolina, and northward. Sept. 
— Stem 1°-1}° high. Leaves thin, 3! — 5/ long, strongly veined. 
$5. OxvrnrPoLIUM. — Scales of the involucre without herbaceous tips, scarious on 
the margins : pappus soft-hairy : stems smooth and slender : leaves narrow, entire, 
mostly fleshy. x 
* Perennial: scales of the involucre imbricated in several rows : rays conspicuous. 
44. A. Chapmanii, Torr. & Gray. Stem erect, straight, branched above; 
lower leaves long (3! — 9' ), linear, spreading, the upper scattered, subulate, erect; 
heads large, solitary, terminating the slender branches ; scales of the involucre 
ite, rigid; rays showy, purple; achenia smooth, many-ribbed. — Pinc- 
barren swamps, West Florida. Oct. — Stem 2°-3° high. 
45. A. flexuosus, Nutt. Stem mostly reclining, flexuous, sparingly 
branched ; leaves fleshy, narrow-linear ; heads few, scattered, terminal, small ; 
Scales of the involucre narrow-linear, very acute, the lower ones smaller and 
Passing into bracts ; achenia slightly hairy, 5-ribbed. — Salt marshes, common. 
— Stem 1°-3° Jong. Rays white or pale purple. See 
* * Annual: scales of the involucre in 2-3 rows: rays short. = 
46. A. linifolius, L. Stem paniculately much branched ; leaves linear- 
late, tapering at each end ; those of the branches linear or filiform, sessile ; 
small, very numerous, in leafy racemes ; scales of the cylindrical involucre 
"subulate, smooth ; rays in two rows, not longer than the disk; achenia 
Somewhat hairy, 5-ribbed. — Wet places along the coast, Florida, and north- 
ward. Oct.— Stem 2°-3° high. Lowest leaves sharply serrate. ee 
| 47. A. divaricatus, Nutt. Stem diffasel 
Mi the lowest ones linear, tapering at the base ; à 
