838 compositap: ^^composite family) 



5. C. pub^scens Ell. More leaf}', 0.;3-1.3 m, high, pubescent or nearly 

 glabrous ; leaves thickish, ohloiuj or the lower oval-obovate and the upper 

 oblong-lanceolate, entire or with 2-4 small lateral lobes ; heads usually smaller. 

 — Woods, Va. to s. 111., Mo., and south w. June-Sept. 



* * Wings of achene narrow, callous-thickened^ involute. 



6. C. auriculata L. Pubescent or glabrous; stems 5-18 dm. high, branch- 

 ing, sometimes witli runners ; leaves mostly petioled, the npper oblong or oval- 

 lanceolate, entire; the lower oval or roundish, some of them variously ."i-o-lobed 

 or -divided; outer bracts oblong-linear or lanceolate. — Rich woods and banks, 

 Ya. to 111., and south w. June-Sept. 



§3. Style-tips cuspidate ; achenes oblong, nearly straight, imthout callus, the 

 wing narrow or none; rays yellow, mostly entire or slightly toothed. 



* Outer bracts narrow, about the length of the inner, all more or less united at 



base; rays mostly entire, acute; pappus 2-tonthed or none ; leaves opposite, 

 sessile, mostly S-divided, appearing as if whorl ed ; perennial, "^-^ dm. high. 



■*- Leaves S-cleft, but not to the base. 



7. C. palmata Xutt. Nearly smooth, simple ; leaves broadly wedge-shaped, 

 rigid; the lobes broadly linear, entire, or the middle one 3-lobed. — Prairies, 

 Mich, to Man., and southwestw. Jxily. 



-»- -*- Leaves divided to the base, ux>perm,ost and lowest sometimes simple. 



8. C. major Walt. Plant minutely soft-pubescent ; leaves each divided into 

 3 sessile ovate-lanceolate entire leaflets, therefore appearing like 6 in a whorl. 

 (0. senifolia Michx. ) — Sandy woods, Va., and south w. July, 



Yar. stellata (Xutt.) Robinson. Glabrous; the leaves narrower. (C. seni- 

 folia, var. T. & G. ; C. major, var. Oemleri Britton.) — Ya. , Ky., and southw. 



9. C. delphinifolia Lam. Glabrous or nearly so ; leaves divided into 3 

 sessile leaflets which are 2-6-parted, their divisions lance-linear, 2-6 mm. broad, 

 rather rigid ; disk brownish. ^-Pine woods, Ya., and southw. Jui_y. 



10. C. verticillata L. Glabrous ; leaves divided into 3 sessile leafl.ets which 

 are 1-2-pi nnat el y parted into narrowly linear or filiform divisions. — Dry ridges 

 and open woods, Md. to S. C. and Ark.; reported from w. Ont. and n. Mich.; 

 cultivated in old gardens, but not showy; occasionally escaping. July-Sept. 



* * Outer bracts narrovj, shorter, all united at base; rays entire, obtuse; pappus 



none ; leaves petiolate, pinnately S-o-dioided ; perennial. 



11. C. tripteris L, (Tall Coreopsis.) Smooth; stem simple, 1-2.7 m. 

 high, corymbed at the top; leaflets lanceolate, acute, entire. — Pa. to s. Ont., 

 Wise, e. Kan., and southw. Aug., Sept. — Heads exhaling the odor of anise 

 when bruised ; disk turning brownish. 



55. THELESPERMA Less. 



Heads many-flowered ; rays about 8 and neutral, or none. Involucre as in 

 Coreopsis, the inner bracts scarious-margined. Receptacle flat, the scarious 

 chaff falling with the wingless and beakless achenes ; pappus of 2 stout subulate 

 retrorsely hispid awns. — Smooth herbs, with opposite dissected leaves and 

 pedunculate heads of yellow flowers. (From dyfKr], a nipple, and air^pfia, seed, 

 on account of the papillose achenes.) 



1. T. triiidum (Poir.) Britton. Animal or biennial. 3-7 dm. high, loosely 

 branching and very leafy; leaves 2-pinnate, the lobes filiform; outer involucral 

 bracts 8, subulate-linear, hardly e<iualing the inner which are united only below 

 thf middle ; rays 1 cm. or more long ; outer achenes conspicuously rougliened on 

 the back. — linrrfus and plains. Mo. to Neb., we.stw. and southwestw. Ma3'-Aug. 



2. T. gracile ( Torr. ) Gray. Perennial, rather rigid, naked above ; leaves 

 with narrow or filiform divisions or the upper entire ; bracts 4-0, the outer very 



