216 COMrOSITJE. (composite family.) 



Biennial or perennial hair}- or silky herbs, with linear or oblong mostly entire 

 leaves. Heads mostly coiymbed. 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 iuvolucre 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 loicest narrowed at the Ixise, 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- 

 Mi ; corymb targe, compound; peduncles and involucre smoothish. — Var. nvs- 

 BOPIFOLIA (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. 



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

 oblong, obtuse, entire ; the lowest spatulatc, the upper Bessile; corymb 



simple. (('. denUta, /•'//., leaves larger, the lowest sinuate toothed.) — Dry 

 Bandy -oil, Florida, ami northward. Sept. — Stem 1°- 2° high. 



7. C. scabrella, Ton-. & Gray. PnlvernlemVBcabrous throughout; Men 

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

 tire, equally Somewhat glandular-scabrous on both sides, BeS8ile, the lower ones 



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

 lanceolate obtuse scales of the invoincie pabernlent glandular. — Tine woods, 



Florida. Sept. and (Jet. — Stem iP high. 



