838 COMPOSITAE (COMPOSITE FAMILY^) 



5. C. pub^scens Ell. More leafy, 0.5-1.3 m. high, pubescent or nearlj 

 glabi-ous ; leaves thickish, oblong or the lower oval-obovate and the uppei 

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

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



* * Wings of aohene narrow, callous-thickened, involute. 



6. C. auriculUta L. Pubescent or glabrous; stems 5-13 dm. high, branch- 

 ing, sometimes with runners ; leaves mostly petioled, the upper oblong or oval- 

 lanceolate, entire; the lower oval or roundish, some of them variously 3-5-lobed 

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

 Va. to 111., and southw. June-Sept. 



§ 3. Style-tips cuspidate ; achenea oblong, nearly straight, without 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-toothed or none ; leaves opposite, 

 sessile, mostly S-divided, appearing as if whorled ; perennial, 3-9 dm. high. 



•1- Leaves 3-cleft, but not to the base. 



7. C. palmjlta Nutt. 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. July. 



-I- -1- Leaves divided to the base, uppermost and lowest sometimes simple. 



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

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

 (C. senifolia Michx.) — Sandy woods, Va., and southw. July. 



Var. stellslta (Nutt.) Robinson. Glabrous; the leaves narrower. (C seni- 

 folia, var. T. & 6.; C. major, var. Oemleri Britton.) — Va., Ky., and southw. 



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

 sessUe leaflets which are 2-5-parted, their divisions lance-linear, 2-6 mm.broad, 

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



10. C. verticill^ta L. Glabrous ; leaves divided into 3 sessile leaflets which 

 are 1-2-pinnately parted into narrowly linear or filiform divisions. — Dry ridges 

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

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



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



none ; leaves petiolate, pinnately S-6-divided ," perennial. 



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

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

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

 when bruised ; disk turning brownish. 



85. THELESP^RMA Less. 



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

 Coreopsis, the inner bracts soarious-margined. Receptacle flat, the searious 

 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 9ij\^, a nipple, and <riripiia, seed, 

 on account of the papillose achenes.) 



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

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

 bracts 8, subnlate-Unear, hardly equaling the inner which are united only below 

 the middle ; rays I cm. or more long ; outer achenes conspicuously roughened on 

 the back. — Barrens and plains. Mo. to Neb., westw. and southwestw. May-Ang. 



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

 with narrow or filiform divisions or the upper entire i^bi-acts 4-6, the outer vern 



