COMPOSITE FAMILY 245 



2. Z. columnaris T. & G. Prairie Cone Flower. Stem rough- 

 hairy, slender, usually branching from the base, 1-2 ft. high. Leaves 

 pinnately divided into oblong to narrowly linear segments. Disk 

 columnar, sometimes more than 1 in. long. Rays 4-10, drooping, 

 yellow or partly or entirely brownish-purple, as long as or somewhat 

 shorter than the disk. On dry prairies, especially W. and S.W. 



VI. COREOPSIS L. 



Annual or perennial herbs. Leaves opposite or the upper 

 alternate, entire or pinnately divided. Heads radiate, solitary 

 or corymbed, many-flowered ; bracts in 2 rows of about 8 each, 

 the inner membranaceous and appressed, the outer narrower 

 and spreading; receptacle chaffy. Ray flowers neutral; disk 

 flowers tubular, bisexual. Akenes compressed, oval to oblong, 

 often winged. Pappus of 2 scales or bristles, or wanting.* 



1. C. tinctoria Nutt. Garden Coreopsis. Annual; stem erect, 

 smooth, branched, 2-3 ft. high. Leaves 2-3 times pinnately divided, 

 the divisions linear; lower leaves petioled, the upper often sessile and 

 entire. Heads 1-1^ in. wide, on slender peduncles; inner bracts 

 brown with scarious margins, outer bracts very short. Ray flowers 

 about 8, yellow with a brown base, 3-lobed at the apex. Akenes 

 linear. Pappus minute or none. Common in gardens.* 



2. C. lanceolata L. Tickseed. Perennial; stem slender, erect or 

 ascending, smooth or slightly downy below, simple, 9-15 in. high. 

 Leaves opposite, the lower spatulate to elliptical, sometimes lobed, on 

 long, haiiy-f ringed petioles; the upper lanceolate, sessile. Heads few, 

 on long peduncles ; bracts ovate-lanceolate, the outer narrower. Ray 

 flowers 6-10 ; rays 8-5-lobed, bright yellow. Akenes oval, broadly 

 winged, warty. Pappus of 2 teeth. On rich, dry soil, S. and E.* 



3. C. grandiflora Hogg. Large-Flowered Tickseed. Usually 

 perennial ; stem smooth, commonly branched above, 1-3 ft. high. 

 Most of the leaves once or twice pinnately parted, the lower some- 

 times entire, on slender petioles ; segments of most of the stem leaves 

 linear or thread-like. Heads usually several, 1^-2 in. in diameter, on 

 long peduncles ; outer bracts lanceolate, narrower and shorter than 

 the inner ones. Rays 6-10, yellow. Akenes oblong, with broad wings 

 when ripe. In moist soil, especially S.W. 



4. C. auriculata L. Running Tickseed. Perennial ; stem ascend- 

 ing or decumbent, weak, smooth, nearly simple, 6-15 in. long. 

 Leaves ovate to oval, entire or with 2-4 small and rounded lobes at 

 the base, downy, long petioled. Heads 1-1 ^ in. wide, few or single ; 

 outer bracts narrower than the inner. Rays 6-10, mostly 4-toothed. 



