1278 CARDUACEAE 
obovate, with three rounded lobes at the apex: chaff of the receptacle linear, acute: 
achenes elliptic-oblong, 1.5-2 mm. long, bordered by a wing about one-third as broad as 
the body : pappus a pair of blunt teeth. 
In pine lands, Louisiana. Summer and fall. 
20. Coreopsis símilis F. E. Boynton. Annual, glabrous. Stems 1-3 dm. high, 
grooved and striate, branched : leaves opposite, various; blades of all but the upper ones 
slender-petioled, those of the lower leaves either divided into ovate or elliptic-oblong. seg- 
ments (the terminal one the larger and often 1 cm. broad), or simple ; those of the upper 
leaves with linear or linear-oblong segments: heads 2-2.5 cm. broad including the rays: 
exterior involucral bracts subulate-lanceolate, about 2 mm. long, the inner ovate, about 5 
mm. long: chaff of the receptacle linear, acute: ligules obovate, 3-lobed at the summit : 
achenes orbicular, 2-2.5 mm. high, the wing as wide as the body : pappus a pair of slender 
awns. 
In moist soil, Texas. Spring and summer. 
21. Coreopsis Leavenwórthii T. & G. Annual, glabrous. Stems erect, 5-15 dm. 
high, terete, striate, branched, leafy throughout: leaves opposite; the lower and middle 
stem-leaves with blades mostly divided into two or more narrowly linear segments, the 
upper mostly simple and very narrow : heads 2-3 cm. broad including the rays: exterior 
involucral bracts subulate-lanceolate, 1-2 mm. long, the inner ovate, 5-7 mm. long: ligules 
obovate, with three rounded lobes at the apex: chaff of the receptacle linear, acute: 
achenes roundish-oval, 2.5-3 mm. long, the wing as broad as the body : pappus a pair of 
erect, slender awns. 
In moist soil, Florida. Summer.— C. Leavenworthii Gárberi T. & G. A form with the divisions of 
the leaf-blades much broader than the species. Possibly a distinct species. Florida. 
22. Coreopsis Lewtónii Small. Perennial, glabrous. Stems slender, erect or ascend- 
ing, 3-5 dm. high, round, striate, branched at the base: leaves opposite, approximate below, 
distant above ; blades linear or narrowly cuneate, 1-3 cm. long, simple and entire, longer 
than the slender petioles: heads 2.5-3 cm. broad including the rays: exterior involucral 
bracts ovate-lanceolate, 1-1.5 mm. long, obtuse, the inner oblong or oblong-lanceolate, 5- 
6 mm. long: ligules obovate or broadly cuneate, 3-lobed at the apex, the middle lobe 
notched : chaff of the receptacle linear, acute : achenes suborbicular, the wing as broad as 
the body : pappus a pair of slender awns. 
In low, sandy soil, peninsular Florida. Summer. 
23. Coreopsis angustifdlia Ait. Perennial, glabrous. Stems 5-7 dm. high, slender, 
erect, branched above, more or less 4-angled. striate: leaves opposite or sometimes the 
lower alternate, shorter or little longer than the internodes ; blades of the basal and lower 
stem-leaves petioled, spatulate or oblanceolate, 4-9 mm. broad, rounded at the apex ; the 
upper sessile, linear, much reduced in size, or the upper ones mere subulate scales : heads 
2-3 cm. broad including the rays: outer involucral bracts ovate, rigid, 2-3 mm. lang, the 
inner ovate-lanceolate, 5-8 mm. long: ligules obovate, 3-lobed at the apex, the middle 
lobe notched : chaff of the receptacle linear, acute : achenes broadly oval, 2.5-3 mm. long, 
bordered by an irregularly lacerate wing : pappus a pair of slender awns. 
In wet soil, North Carolina to Florida. Summer and fall. 
24. Coreopsis longifdlia Small. Perennial, glabrous. Stems 7-10 dm. high, erect, 
simple or sparingly branched at the summit, round, striate-grooved: leaves alternate, the 
basal and lower stem-leaves (including the petioles) much longer than the internodes, their 
blades linear-oblong, linear-lanceolate or linear, 2-10 mm. broad, acutish, those of the 
upper stem-leaves sessile, reduced to inconspicuous scales : heads 3-4 cm. broad including 
the rays: outer involucral bracts lanceolate, 2-4 mm. long, the inner 2-3 times longer than 
the outer, oblong-elliptic: ligules obovate, 3-lobed at the apex, the middle lobe rounded 
or notched : chaff of the receptacle linear, acute: achenes obovoid or spatulate in outline, 
about 4 mm. long, bordered by a pectinate wing : pappus a pair of fugacious awns. 
In low grounds, southern Georgia and Florida. Fall. . 
25. Coreopsis falcata F. E. Boynton. Perennial, glabrous. Stems 8-12 dm. high, 
stout, erect, corymbosely branched near the summit, round, striate: leaves alternate, the 
basal and lower stem-leaves with petioles 1-1.5 dm. long, their blades scythe-shaped, 1-1. 
dm. long, 1-2 cm. broad, tapering toward the apex, but terminating in an obtuse tip, 
entire or with one or more narrow, ascending lobes ; blades of the upper stem-leaves nar- 
rower, sessile, usually with two or more narrow, lateral lobes; those of the branches re- 
duced and scale-like: heads 3-5 em. broad including the rays: outer involucral bracts 
lanceolate, 5-7 mm. long, the inner about one-third longer than the outer, elliptic-oblong 
to ovate : ligules obovate, 3-lobed, the middle lobe rounded or notched : chaff of the recep- 
tacle linear, acute : achenes oblong, nearly 5 mm. long, the broad wing cut into very “ne 
fringe-like segments : pappus a pair of awns less than 1 mm. long. 
In swamps, eastern North Carolina. Early summer. 
