CoRKOi-sis. LXXV. COMPOSITE. 345 



§ § Rays and disk yellow. 

 2. C. TRiCHOSPERMA. Miclix. Tick-seed Sunflower. 



/S/!. glabrous, square, dichotomous; /ra. pinaately 5— 7-parted, briefly pe- 

 tiolate, segm. lanceolate, incised or serrate ; scaki of the outer invol. ciliate 

 linear, long as the inner ; ratjs entire, large ; ach. narrow-cuneate 2-awned — 

 ® in wet grounds, N. Y., Mass. to Car. A smooth, branching plant 1— 2thio-h 

 with a panicle of large, showy, yellow heads. Branches and leaves mostly op- 

 posite. Leaves thin, the upper 3-clelt, subsessile. Leaflets narrow, taperiri'' 

 to a long point, with a Jew unequal, remote serratures. Acheni'a i' long 

 crowned with stout, hispid awns. Jl. Aug. 



3. C. ARisTosA. Michx. 



Sparingly pubescent ; lis. pinnately 5— 9-parted, segments lance-linear, 

 mcisely serrate or pinnatifid ; hds. small, with conspicuous rays ; outer invol. of 

 10—12 linear, green scales, about as long as the inner, villous at base ; awns 

 about as long as the achenium.— Low woods, Western States ! Stem obtusely 

 4-angled, 3— 3f high. Leaves thin, 4 — 6' long, petioles ^—1'. Rays 8 orange- 

 yellow, expanding 1|'. 



/?. (C. involucrata. Nutt. ?) Scales of the outer involucre about 13, a third 

 longer than those of the inner. — la. ! 



4. C. TRipTERis. (Chrysostemma. Less.) 



Glabrous; st. simple, tall, corymbose at summit; Ivs. coriaceous, opposite, 

 petiolate, 3 — 5-divided, divisions linear-lanceolate, entire, acute ; hds. small, on 

 short peduncles.— A tall, smooth, elegant species, in dry soWsf Southern and 

 Western States, common in la. ! Stem 4— 8f high, slender, terete. Divisions 

 of the leaves 3—5' by |— U'. Rays spreading, §' long. Outer scales linear, 

 obtuse, spreading, as many as the inner. Jl. — Oct. 



5. C. VERTiciLLATA. Whort-leaved Coreopsis. 



Glabrous, branched; Ivs. 3-divided, closely sessile, divisions pinnately 

 parted, segments linear, obtuse ; rays acute or (in cultivation) obtuse and 2 or 

 3-toothed ; ach. obovate, slightly 2-toQthed.— TJ. Moist places, Md. and Western 

 States ! Stem 1— 3f hi§h. Leaflets apparently verticillate in 6s. Heads with 

 bright yellow rays, near 1' long. Outer scales oblong-linear, obtuse, united at 

 base. June — Aug. 



6. C. PALMATA. Nutt. (Calliopsis. Spreng.) 



Nearly smooth ; st. branched, angled and striate, very leafy to the sum- 

 mit ; Ivs. sessile, deeply 3-cleft, rigid, lobes linear, acutish, entire or again cleft; 

 raijs obovate-oblong ; ach. linear-elliptic, incurved. — Dry prairies, W. States < 

 Stem 1— 2f high, sometimes much branched. Leaves 1—2^' long, some of 

 them undivided, lobes 2 — i" wide. Heads 1 or several, with yellow rays 

 Outer scales linear-oblong, obtuse. Jn. Jl. 



7. C. LANCEoi.ATA. Lancc-leaved Coreopsis. 



St. ascending, often branched below; lower Ivs. oblanceolate, petiolate, the 

 «^er lanceolate, sessile, all entire, with scabrous margins; hds. solitary, on 

 very long, naked peduncles; rays 4— 5-toothed at apex ; ach. suborbicular, with 

 2 small teeth.— If. Native of the Southern States ! Heads showy. Ravs about 

 8, 1' by i'. Jn.— Aug. f 



^ § § Rays or disk purple. 



8. C. DRUMMONDii. T. & G. CCalliopsis. Don.) Drummond's Coreopsis.— 

 Pubescent ; Ivs. pinnately divided, sometimes simple, segments (or leaves) 

 oval, entire; scales lanceolate-acuminate; rays unequally 5-toothed, twice longer 

 than the involucre; ach. obovate, incurved, scarcely toothed. — (I) From Texas. 

 Stems 10 — 20' high. Rays large, yellow, with a purple spot at base, -j- 



/?. a,trosanguinea, a garden variety, with dark orange flowers. 



9. C. TiNCTORiA. Dyer's Coreopsis. — Lvs. attenuate, radical ones subbipinnate ; 

 Ifts. oval, entire, smooth ; cauline subpinnate, Ifts. linear ; rays two-colored ; ach. 

 naked. — A handsome border annual, native of the Upper Missouri. Stem 1 — 3f 

 high, with light, smooth foliage. Heads with yellow rays, beautifully colored 

 with purple at their base. Flowering all stimmer, f 



