1276 CAKDUACEAE 



either simple or with one or two small basal lobes : heads 4-5 cm. broad including the 

 rays : outer involucral bracts linear-oblong. 7-9 mm. long, the inner ovate, commonly 

 about the length of the outer : ligules obovate to broadly cuneate, 3-lobed, the middle lobe 

 notched : achenes oval, 2-2.5 mm. long, the margins incurved, the narrow wing strongly 

 involute and callous-thickened at maturity : pappus a pair of inconspicuous squamellate 

 scales, mostly wanting at maturity. 



In dry soil, Virginia to Florida. Spring and summer. 



7. Coreopsis Nuece"nsis Heller. Annual, sparsely hirsute to nearly glabrous. Stems 

 erect, 2-4 dm. tall, branching near the leafy base, naked above : leaves opposite ; blades 

 of all except the uppermost petioled, broadly oval to oblong-spatulate, entire, or more 

 commonly with one or two pairs of lateral lobes : heads about 4 cm. broad including the 

 rays : outer involucral bracts lanceolate, 6-8 mm. long, the inner broadly ovate, somewhat 

 longer than the outer : ligules cuneate, 3-lobed, the middle lobe deeply notched, bright 

 yellow with purple-brown markings near the base : achenes orbicular, about 4 mm. long, 

 the wings slightly incurved ; callosities conspicuous ; pappus of two small fimbriolate 

 squamellae. 



In dry or moist soil, eastern Texas. Spring and summer. 



8. Coreopsis tripteris L. Perennial. Stems glabrous or nearly so, erect, 1-3 m. 

 tall, terete, much branched above, leafy throughout : leaves opposite ; blades petioled and 

 divided into three elliptic-lanceolate or lanceolate segments (frequently the middle one is 

 again parted or divided), either glabrous or pubescent ; or blades of the uppermost leaves 

 simple, lanceolate and entire : heads 4-5 cm. broad including the rays : outer involucral 

 bracts linear, obtuse, 2-3 mm. long, the inner ovate, about 5 mm. long : ligules elliptic- 

 oblong, entire or somewhat notched at the apex : chaff of the receptacle linear-spatulate, 

 obtuse, marked with purple lines : achenes elliptic oblong, 5-6 mm. long, narrowly winged: 

 pappus a short fimbriate border. 



In moist thickets, Pennsylvania to Florida and Louisiana. Summer and fall. ' 



9. Coreopsis palmata Nutt. Perennial. Stems erect, glabrous, 5-9 dm. tall, angled 

 and striate, simple or somewhat branched, leafy : leaves opposite ; blades sessile, thick and 

 rigid, 3-cleft to about the middle, the divisions linear-oblong (the middle one sometimes 

 3-lobed), or those of the uppermost leaves often simple and entire : heads 4-5 cm. broad 

 including the rays : outer involucral bracts linear, rigid, obtuse, 7-9 mm. long, the inner 

 oblong-obovate, slightly longer than the outer : ligules oblong-obovate, more or less irregu- 

 larly notched at the apex : chaff of the receptacle linear, acute : achenes elliptic-oblong, 

 5-6 mm. long, narrowly winged : pappus a slight extension of the wings. 



In dry soil, Illinois to Louisiana and Texas. Summer. 



10. Coreopsis major Walt. Stems erect, pubescent, 5-9 dm. high, round or some- 

 what angled and branched above, leafy : leaves opposite ; blades sessile, 3-divided to very 

 near the base, the divisions elliptic-lanceolate or lanceolate, or blades of the uppermost 

 leaves simple and entire : heads 3-5 cm. broad including the rays : outer involucral bracts 

 linear-oblong, obtuse, 5-6 mm. long, the inner lance-ovate, about the length of the outer : 

 ligules elliptic-oblong, entire or slightly toothed at the apex : chaff of the receptacle linear, 

 acute : achenes elliptic-oblong, 5-6 mm. long, bordered by a narrow wing : pappus a short 

 extension of the wings. 



In dry soil, Virginia to Florida. Summer and fall. C. major Odmleri (Ell.) Britton. Like the 

 above but glabrous throughout. Range of the species. C. major rigida (Nutt.) F. E. Boynton. A 

 glabrous form with the divisions of the leaf-blades very narrow. North Carolina to Florida. 



11. Coreopsis verticillata L. Perennial. Stems glabrous, erect, 5-9 dm. high, stri- 

 ate, round or somewhat angled and usually much branched above, leafy : leaves opposite ; 

 blades palmately 3-divided, the divisions once or twice pinnately parted into linear-fili- 

 form segments : heads 4-5 cm. broad including the rays : outer involucral bracts linear, 

 5-6 mm. long, obtuse, the inner elliptic-oblong, slightly longer than the outer : ligules 

 elliptic-oblong, entire or slightly notched at the apex : chaff of the receptacle linear, acute : 

 achenes oblong-obovate, 4-5 mm. long : pappus a short lacerate extension of the wings. 



In dry soil, Canada to Nebraska, North Carolina and Kansas. Summer and fall. 



12. Coreopsis delphinifolia Lam. Perennial. Stems erect, glabrous, 8-15 dm. high, 

 angled and striate, branched above, leafy : leaves opposite ; blades palmately 3-divided, the 

 middle segment commonly again divided into 3-5 linear, acute divisions, or blades of the 

 uppermost leaves often simple and entire : internodes mostly much longer than the leaves : 

 heads 4-5 cm. broad including the rays : outer involucral bracts linear, obtuse, 5-6 mm. 

 long, the inner ovate, slightly longer than the outer : ligules elliptic-oblong, entire or 

 slightly toothed at the apex : chaff linear or slightly dilated at the tip : achenes elliptic- 

 oblong, 5-6 mm. long, narrowly winged : pappus of short fimbriate teeth. 



In dry woods, Virginia to Alabama and Georgia. Summer. 



