218 (joMrosrr.K. (COMPOSITE FAMILY.) 



lucre nearly as long as the disk ; the exterior scales rigid, with spreading 

 fringed tips; rays about 10, pale purple. Low shady woods, in the upper 

 districts. Sept. Stem 1^ - 2 high. Leaves 4' - 6' long, % - 4' wide. 



2. HELEASTRUM. Heads few and racemose, or solitary, large: scales of 

 the involucre nearly equal, linear, riijid : achenia nearly glabrous: pappus 

 rigid: leaves linear, entire, or spinulose along the margins. 



3. A. palud.OSUS, Ait. Stem slightly roughened ; leaves linear, rigid, 

 acute, partly clasping, often fringed near the base ; heads 3-8, racemed or 

 corymbed ; involucre hemispherical, as long as the disk ; the scales nearly 

 equal, linear-spatulate, with mucrouate green spreading tips. Low ground, 

 Florida to North Carolina. Sept. -Oct. Stem l-2 high. Leaves 2' -4' 

 long. Heads \' - f wide. Kays numerous, deep blue. 



4. A. SpinulOSUS, Chapm. Rhi/.oma tuberous; stem simple, pubes : 

 cent; leaves rigid, narrow-linear, appressed, the margins fringed with bristly 

 hairs; the lowest numerous and elongated; heads 4-8 in a simple spike; 

 involucre bell-shaped ; scales equal, lanceolate-subulate, rigid, erect, spinc- 

 pointed, bristly near the base ; acheuia strongly ribbed. Damp pine barrens, 

 West Florida, near the coast. June - August. Stem 1 0' - 1 5' high. Lowest 

 leaves 6' -12' long, 1" -3" wide; the upper ones 1' long. Heads -J' wide. 

 Hays 12- 15, pale blue. Pappus tawny. 



5. A. eryngiifolius, Torr. & Gray. Rhizoma tuberous; stem simple, 

 pubescent; leaves lanceolate-linear, the lowest mostly entire; the others erect, 

 and fringed with spiny teeth ; heads very large, solitary, or 3-4 in a loose 

 raceme; involucre hemispherical; scales very numerous, lanceolate, tapering 

 into a long slender recurved tip ; achenia short, oblong. Low pine barrens, 

 Florida. June -August. Stem l-2 high. Lowest leaves 4' -6' long. 

 Heads 1' or more in diameter. Rays numerous, white. 



3. CALLIASTRUM. Scales of the involucre imbricated in several rows, cori- 

 aceous, usually with herbaceous spreading tips: rai/s 12 or more : achenia 

 near! >/ smooth: pap/nts of unequal rather rigid brist/cs, somewhat thickened 

 upward: leares rigid, none of them cordate: he/ids large and showy. 



6. A. mirabilis, Torr. & Gray. Rough-pubescent ; stem corymbosely 

 branched above; leaves ovate, mucronate serrate, sessile; the lowest abruptly 

 narrowed into a petiole ; involucre hemispherical ; the scales oblong-linear, 

 obtuse and recurved at the summit ; achenia nearly smooth, striate. Colum- 

 bia, South Carolina (Prof. Gibbes). Sept. Stem l-2 high. Stem leaves 

 l'-3' long. Rays about 20, blue or violet, elongated. 



7. A. spectabilis, Ait. Stem corymbose and glandular-pubescent 

 above ; leaves oblong-lanceolate, rough on the upper surface, sessile and en- 

 tire; the lowest tapering into a petiole, and sparingly serrate; heads not 

 numerous, single, terminating the branches ; involucre nearly hemispherical, 

 as long as the disk ; the scales linear-oblong, with obtuse and spreading glan- 

 dular tips. North Carolina ( Curtis). Sept. - Oct. Rhizoma slender. Stem 

 l-2 high. Leaves 2' -4' long. Heads \' in diameter. Rays about 20, 1' 

 long, deep violet. 



8. A. gracilis, Nutt. Stem slender, slightly pubescent, corymbose at 

 the summit; leaves rough, oblong, partly clasping, entire; the lowest ob- 



