order Lxvm. — composite. 377 



1. C. argente'a, (Nutt.) Stem branching toward the summit, silky. 

 Leave* lanceolate, long, linear, entire, somewhat rigid, covered with a 

 silky pubescence. Flowers in terminal corymbs; involucre pubescent, 

 imbricate; leaflets subulate, acute; ray florets 10 — 11, those of the 

 disk numerous. Seeds oblong, villous or hispid ; pappus colored. — Yel- 

 low. U- July — Oct. Dry soils. 



2. C. graminifo'lia, (Nutt.) Stein erect, silky, leafy toward the sum- 

 mit. Leaves entire, lanceolate, linear, covered with a silky pubescence. 

 Flowers in compound corymbs. Stamens at first yellow, afterward 

 white. Seed oblong ; pappus colored, but lighter than the preceding. — 

 Yellow. 2f. July — Oct. Sandy soils. Common. ] — 2 feet. 



3. C. oligan'tha, (Chap.) Stem simple, slender, leafy and silky be- 

 low the middle, glandular and naked above. Leaves lanceolate orspat- 

 ulate, silky pubescent, entire. Heads on elongated peduncles, 2—4 ; 

 involucre campanulate, glandular ; achenia linear, villous. — Middle 

 Florida. April — May. 1 — H foot. 



4. C. fimfo'lia, (Ell.) Stem glabrous, rigid. Leaves numerous, 

 crowded, linear, rigid, those of the branches small, linear. Floivers in 

 terminal corymbs; involucre imbricate, with linear-lanceolate scales, 

 woolly at the point. Anthers white, conspicuous. Seeds long, hairy, 

 hispid ; exterior pappus subulate, whitish, the interior scabrous, brown. 

 — Yellow. Sept. — Oct. Sandhills, middle Geo. 18 — 20 inches. 



5. C. Maria'ka, (Nutt) Stem erect, hairy, simple. Leaves oblong- 

 lanceolate, serrate, acute, the upper ones sessile, the lower ones spatu- 

 late, hairy on the under surface. Flowers in a simple corymb ; invo- 

 lucre many-leaved, viscidly and glandular pubescent. Anthers 2-cleft 

 at the base, with the apex white. Seed oblong, villous ; pappus scarce- 

 ly colored. — Yellow. 2£. Aug. — Oct. Dry sandy soils. 1 — 2 feet. 



6. C. trichophyl'la, (Xutt.) Stem hairy, erect. Leaves oblong, ses- 

 sile, obtuse, lower ones attenuate at the base, woolly. Mowers in sim- 

 ple corymbs ; involucre many -leaved ; leaflets narrow, glandular ; florets 

 of the ray narrow, long. Seed oblong, almost hispid ; pappus colored. 

 — Yellow. 2f. Aug. — Sept. Dry soils. 12 — 18 inches. 



7. C. gosstpi'na, (Xutt.) Stem covered with a white woolly tomen- 

 tum, hoary. Leaves oblong, spatulate, sessile, obtuse, entire. Flowers 

 in simple corymbs ; involucre many-leaved, woolly ; ray florets numer- 

 ous. Anthers white at the summit. Seed viscid, the exterior pappus 

 whit'-, the interior brownish. — Yellow. If. Aug. — Oct. Pine lauds, 

 middle Geo. 



8. C. denta'ta, (Ell.) Stem woolly. Zcai'«?stomentose, cuneate, obo- 

 vate, obtuse, deeply-toothed, the lower ones with a long tapering base, 

 obtusely-toothed toward the apex, upper leaves entire, sessile, amplex- 

 icaul. Flowers in simple corymbs; involucre with subulate woolly 

 leaves ; ray florets numerous, nerved. Seed hispid, exterior pappus 

 white, interior brown. — Yellow. 2f. Aug. — Oct. Middle Georgia, 

 1—2 feet. 



Genus XXVII.— COXY'ZA. L. 



(From konie, dust, from the use made of its powder.) 



Heads many-flowered, with all the flowers tubular, those of 

 the margin pistillate, those of the center perfect or staminate. 

 Seeds of the involucre in many series. Achenia compressed, 



