COMPOSIT.*:. (coMi'o.-^irr. iamilv.) '2X'.\ 



•»- 4- Leaves divided to the bane, uppennust and loirest sometimes simjtle. 



9. C. senif61ia, Michx. Plant mimUcly soft-pubescent ; leaves each di- 

 vided into 3 sessile ovate-lanceolate entire leajiets, therefore appearing like 6 in 

 a whorl. — Sandy woods, Va. and southward. July. 



Var. Stellata, Torr. & Gray. Glabrous, and tlie h-avcs narrower. — Va., 

 Ky., and snutbward. 



10. C. delphinifolia, Lam. Glabrous or nearly so; leaves divided into 

 3 sessile hajlets which are 2 - b-parted, their divisions lance-linear ( I - 3" broad ), 

 rather rigid; disk brownish. — Pine woods, Va. and southward. July. 



11. C. verticillata, L. Glabrous; leaves divided into 3 sessile /f«7y?f-/s 

 wliieh are I -2-pittiiateii/ parted into narroivly linear or Jiliform divisiona. — 

 Damp soil, from Out. and Mich, to Md., Ark., and southward. Cultivated in 

 old gardens, but not showy. July - Sept. 



* # Outer scales narrow, shorter , (dl united at base; rai/s entire, obtuse ; pappus 



none; leaves petiolate, pinnately 3-5-divided ; perennial. 



12. C. tripteris, L. (Tall Coreopsis.) Smooth; stem simple (4 - 9° 

 high), corymbed at the top ; leaflets lanceolate, acute, entire. — Penn. to Wise, 

 Iowa, and southward. Aug. -Sept. — Heads exhaling the odor of anise when 

 bruised ; disk turning brownish. 



* * * Scales mostli) distinct, the outer leafy, rejlexed or spreading ; achenes 



Jlat, obovate or cuneate-oblong , l-nerved on each face, 1-toothed or 2-awned 

 {rarely 4-awned) ; leaves petiolute, usually pinnately 3-7-divided, the lobes 

 serrate; annuals (or biennial), branching. Approaching Bidens. 

 •*- Rays conspicuous, golden yellow. 

 ++ Ache7ies cuneate, obscurely ciliate or naked ; outer scales about 8. 



13. C. aiirea, Ait. Nearly glabrous, 1-3° high; leaves variable, com- 

 monly 3-7-divided, or some or all undivided, the segments incisely serrate or 

 lobed ; achenes broadly cuneate, 1 -2" long, with 2 very short blunt spreading 

 teeth. — Wet ground, Va. to Fl. 



14. C. trichosperma, Michx. (Tickseed Sixfloweh.) Smooth, 

 Itranched ; leaves sliort-petioled, nearly all 3 - 7-divided ; leaflets lanceolate or 

 linear, cut-toothed, or the upper leaves only 3 - .5-cleft and almost sessile ; heads 

 panicled-corymbose ; achenes narrowly wedge-oblong or the inner ones wedge- 

 linear, about 4" long, smooth or sparsely hairy, marginless, crowned with 2 

 erect triangular or awl-shaped stout teeth. — Swamps, Mass. to Va. near the 

 coast. Also Cayuga, N. Y., to 111., where is a var. XEXtfLOBA, Gray, with 

 shorter achenes, approaching the last. Aug. - ( )et. 



tH- ++ Achenes obovate, very jlat, with thin ciliate margins. 



15. C. aristosa, Michx. Somewhat ]nibescent ; leaves 1 -2-pinnately 5- 

 7-divided, petioled ; leaflets lanceolate, cut-toothed or pinnatifid ; heads pani- 

 cled-corymbose ; outer scales 8-10, not exceeding the inner, barely ciliate; 

 achenes with 2 (rarely 4) long and slender diverging awns as long as the achene 

 itself. — Swamps, Ohio to Mich., Minn., and southwestward. Aug. -Oct. — 

 Var. MtjTiCA has two short divergent teeth or points in place of the awns. — 

 W. 111. and southwestward. Forms occur with the barbs of the awns spread- 

 ing or retrorse, hybrids with Bidtnsfrondosa or other species. 



