236 COMPOSITE. (COMPOSITE FAMILY.) 



dular. Sandy pine barrens, common. Sept. Stem l-2high. 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 -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 l-2 high. 



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

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

 ones crowded, obtuse and densely villous, the upper mostly acute and often 

 smoothish; corymb large, compound ; peduncles and involucre smoothish. 

 Var. HYSSOPIFOLIA (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 l'-2' 

 long. 



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

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

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

 cumbens, Flora, inflorescence glandular.) Dry sandy soil, Florida, and 

 northward. Sept. Stem 1 - 2 high. 



7. C. SCabrella, Torr. & Gray. Biennial, glandular-scabrous through- 

 out; the earliest leaves only villous; lowest leaves clustered, spatulate, entire, 

 the others broadly or narrowly lanceolate, l'-2' long; corymb compound; 

 involucral scales linear, acute, rigid; pappus fulvous; acheuia silky. Dry 

 sandy soil near the coast, Florida. Oct. 



8. C. villosa, Nutt. Rough-hairy and somewhat hoary throughout ; 

 stem rigid, very leafy ; leaves lanceolate, acute, entire or sparingly serrate ; 

 the upper ones sessile, the lowest narrowed into a petiole ; heads large, in a 

 simple corymb. Dry soil, Alabama, and westward. Sept. Stem l-2 

 high. Leaves 1' long, fringed near the base. 



25. GRINDELIA, Willd. 



Heads many-flowered. Rays pistillate. Scales of the hemispherical invo- 

 lucre imbricated in several rows. Receptacle flat. Acheuia oval or obovate, 



