216 COMPOSITE. (COMPOSITE FAMILY.) 



Biennial or perennial hairy or silky herbs, with linear or oblong mostly entire 

 leaves. Heads mostly corymbed. Flowers yellow. 



* Leaves narrow, nerved, entire : achenia oblong-linear, narrowed at each end, pubes- 



cent : perennials. 



1. C. graminifolia, Nutt. Stem leafy, white with appressed silky shin- 

 ing hairs, as also the linear leaves ; heads numerous, rather small, on slender and 

 more or less glandular peduncles ; involucre top-shaped, the linear scales glan- 

 dular. (C. argentea, Nutt.) Sandy pine barrens, common. Sept. Stem 

 1 - 2 high. Lowest leaves 4' - 8' long. 



2. C. Oligantha, Chapm. Stem nearly naked and glandular above, the 

 lower part, like the linear or lanceolate leaves, silky with appressed shining 

 hairs; heads 1-4, on long erect glandular peduncles, rather large; involucre 

 bell-shaped, the scales glandular-pubescent. Low pine-barrens, Florida. April 

 and May. * Stem 1 high. Stem-leaves clasping ; those of the root elon- 

 gated. 



3. C. pinifolia, Ell. Smooth ; stem rigid ; leaves linear, crowded, rigid ; 

 corymb large ; scales of the involucre woolly at the summit. High sand-hills 

 in the Western districts of Georgia, Elliott. Stem l- 2 high. Stem-leaves 

 4' -6' long, the uppermost filiform. Heads large. Exterior pappus somewhat 

 chaffy. 



* * Leaves veiny, oblong or lanceolate ; the lowest narrowed at the base, the upper 



sessile : achenia obovate, compressed. 



4. C. Mariana, Nutt. Perennial ; stem simple, covered with loose silky 

 deciduous hairs ; lowest leaves spatulate-oblong, entire or slightly serrate ; the 

 upper ones lanceolate, sessile, entire ; corymb small, mostly simple and umbel- 

 late, cone-like in the bud ; peduncles and involucre glandular. Sandy pine- 

 barrens, Florida, and northward. Sept. Stem 1 - 2 high. 



5. C. trichophylla, Nutt. Biennial ; stem very leafy, mostly branching, 

 villous with loose silky hairs ; leaves oblong or lanceolate, the earliest ones 

 crowded, obtuse and densely villous, the upper mostly acute and often smooth- 

 ish; corymb large, compound; peduncles and involucre smoothish. Var. HYS- 

 SOPIFOLIA (C. hyssopifolia, Nutt.) has narrow-linear and smooth leaves, except 

 the tuft at the base. Dry pine barrens, Florida to North Carolina. Sept. 

 Stem 2 - 3 high, commonly ascending. Leaves 1' - 2' long. 



6. C. gOSSypina, Nutt. Biennial, densely villous and hoary throughout ; 

 leaves oblong, obtuse, entire ; the lowest spatulate, the upper sessile ; corymb 

 simple. (C. dentata, Ell., leaves larger, the lowest sinuate-toothed.) Dry 

 sandy soil, Florida, and northward. Sept. Stem 1- 2 high. 



7. C. scabrella, Torr. & Gray. Pulverulent-scabrous throughout; stem 

 stout, corymbosely branched above ; leaves oblong-lanceolate, mucronulate, en- 

 tire, equally somewhat glandular-scabrous on both sides, sessile, the lower ones 

 narrowed at the base ; heads numerous, in a compound corymb; peduncles and 

 lanceolate obtuse scales of the involucre puberulent-glandular. Pine woods, 

 Florida. Sept. and Oct. Stem 2 high. 



