COREOPSIS. LXXV. COMPOSITE. 345 



Rays and disk yell&w. 

 2. C. TRICHOSPERMA. Michx. Tick-seed Sunflower. 



St. glabrous, square, dichotomous ; Ivs. pinnately 5 7-parted, briefly pe- 

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

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

 (1) in wet grounds, N. Y., Mass, to Car. A smooth, branching plant, 1 2f high, 

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

 posite. Leaves thin, the upper 3-cleft, subsessile. Leaflets narrow, tapering 

 to a long point, with a lew unequal, remote serratures. Achenia ' long, 

 crowned with stout, hispid awns. Jl. Aug. 



3. C. ARISTOSA. Michx. 



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

 incisely 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, 2 3f high. Leaves thin, 4 6' long, petioles 1'. Rays 8, orange- 

 yellow, expanding !'. 



/?. (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 ; Ms. small, on 

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

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

 of the leaves 3 5' by f If. Rays spreading, J' long. Outer scales linear, 

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



5. C. VERTICILLATA. Whorl-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-toothed. 1\. Moist places, Md. and Western 

 States ! Stem 1 3f high. 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 ; 

 rays 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 4" wide. Heads 1 or several, with yellow rays. 

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



7. C. LANCEOLATA. Lance-leaved Coreopsis. 



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

 tipper 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. 7J. Native of the Southern States ! Heads showy. Rays about 

 8,1' by I'. Jn.-Aug.f 



$ Rays or disk purple. 



8. C. DRUMMONDII. T. & G. (Calliopsis. 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. From Texas. 

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



/?. atrosanguinea, 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 summer, f 



