1276 CARDUACEAE 
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 Nuecénsis 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 E 
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 palmàta 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 Oemleri (El.) Britton. Like = 
above but glabrous throughout. Range of the species. C. major rigida (Nutt.) F. E. Boynton. 
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 em. broad including the rays: outerinvolucral bracts pps 
5-6 mm. long, obtuse, the inner elliptic-oblong, slightly longer than the outer : ligu e 
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 delphinifdlia Lam. Perennial. Stems erect, glabrous, 8-15 dm. high, 
angled and striate, branched above, leafy : leaves opposite ; blades palmately 3-divided, xdi 
middle segment commonly again divided into 3-5 linear, acute divisions, or blades of t , 
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 ns 
long, the inner ovate, slightly longer than the outer: ligules elliptic-oblong, entire sd 
slightly toothed at the apex: chaff linear or slightly dilated at the tip: achenes ellipti 
oblong, 5-6 mm. long, narrowly winged : pappus of short fimbriate teeth. 
In dry woods, Virginia to Alabama and Georgia. Summer. 
