ORDEIt LXVIIL— COMPOSITE. 303 



branched at the base. Xm?'^.'? opposite, oblong ; the lower ones alter- 

 nate at the base, hirsute. Flowers terminal; involucre glalirous; rav 

 florets toothed, about 8. — Yellow. U- June — July. Pine-barrens. 

 Conuijon. 1 — 2 feet. 



3. C. latifo'lia, (Mich.) Steyn glabrous, smooth. Leaves opposite, 

 undivided, ovate or ovate-oblong, dentate or serrate ; teeth mucronate. 

 Heads in corymbs ; scales of the involucre hnear, the outer spreading ; 

 rays large, 5 — G. — Yellow. Aug. Mountains. 4 — 6 feet. 



4. C. argu'ta, (Pursh.) Stem glabrous. Leaves lanceolate-ovate, acu- 

 minate, serrate. Flowers on axillary and terminal peduncles, dichoto- 

 mously divided. — Yellow. If. Carolina. 



5. C. (Emle'ei, (Ell.) {0. integrifolia, Poir.) Steyn glabrous, angular. 

 Leaves sessile, glabrous, acute at each end, clasping, and somewhat 

 connate. i*7oii>ers opposite, axillary ; the upper ones in corymbs; the 

 exterior involucre smaller than the interior; ray florets about 8, entire. 

 /Stfec/s compressed, margined. — Yellow. 11. July — Aug. Upper Car. 



6. C. rose'a, (Nutt.) Ste7n glabrous, simple or branching. Leaves 

 opposite, connate, linear, entire. Floicers on axillary and terminal pe- 

 duncles ; exterior involucre small ; ray florets about 8. Seed entire. — 

 Pale red. If. Aug. — Sept. In damp pine-barrens. Common. 10 — 

 12 inches. 



b. Leaves opposite, divided. 



7. C. auricula'ta, (L.) Stem pubescent or nearly glabrous. Leaves 

 eessile, entire, oblong-lanceolate, finely pubescent, the lower ones di- 

 vided, with 2 small lateral lobes at the base. Flowers axillary and 

 terminal ; exterior involucre equal to the interior; ray florets about 8, 

 toothed.— Yellow. U Aug.— Oct. 3 — i feet. 



8. C. diversifo'lia, (Ell.) Stem pubescent, dichotomously divided. 

 Lower leaves trifoliate, the leaflets obovate or nearly orbicular ; the 

 upper ones spatulate-lanceolate, all entire, sj^rinkled with glandular 

 hairs. Floivers on long peduncles ; exterior involucre equal to the inte- 

 rior. Seed nearly round. — Yellow. If. May — July. Middle Car. 

 and Geo. 



9. C. senifo'lia, (Mich.) Stc7n pubescent, branching townrd the sum- 

 mit, angled. Leaves sessile, opposite, trifoliate ; leaflets pubescent, lan- 

 ceolate. Flowers in terminal corymbs ; exterior involucre equal to the 

 interior, both pubescent ; ray florets pubescent on the outer surface, 

 about 8. — Yellow. U- June — Aug. Pine lands. 2 — 3 feet. 



10. C. tincto'ria, (Nutt.) Stem glabrous. Leaves opposite, pinnately 

 divided; lobes linear, entire ; rays 3-lobed, twice the lengtli of the in- 

 volucre. Acheiiia oblong, wingless. A cultivated plant. — Yellow and 

 purple. July — Oct. Lou. and Texas. 1 — 3 feet. 



11. C.verticiixa'ta, (Ehr.) {C. dt'lphln?folia,'L&m.) >5/ an erect, angled 

 striate, glabrous, branching near the summit. Leaves oppo.>^ito, trifoliate, 

 sessile ; middle leaflet frequently 3-parted ; leaflets linear-lanceolate, 

 entire. Floioers in cor jmhs ; exterior involucre usually 10-leaved, in- 

 terior 8 ; ray florets 8. Seed compressed ; chaff filiform, dilated at the 

 summit. — Yellow. U- June — Aug. Dry soils. 2 — 3 feet. 



12. C. angustifo'lta, (Ait.) Ste7n simple, corymbose at the summit, 

 glabrous, angled, slender. Leaves entire, opposite or alternate, linear 

 or lanceolate, narrowed toward the base; rays obovato, tapering at the 



17* 



