CARDUACEAE 1279 
26. Coreopsis gladiata Walt. Perennial. Stems erect, 6-12 dm. high, terete or 
slightly angled, striate, branched above, glabrous: leaves mostly alternate, the basal and 
lower stem-leaves petioled, their blades entire, elliptic-oblong to oblanceolate, 1-2 cm. 
broad, rounded at the apex ; upper stem-leaves with sessile blades, abruptly reduced to 
small scales: heads 4-6 mm. broad including the rays : outer involucral bracts broadly tri- 
angular, 3-4 mm. long, the inner ovate-lanceolate, 9-12 mm. long : ligules obovate, 3-lobed 
at the apex, the middle lobe rounded or more commonly notched : chaff of the receptacle 
linear, acute : achenes elliptic-oblong, about 3.5 mm. long, with a lacerate marginal wing : 
pappus a pair of slender awns. 
In wet soil, North Carolina to Florida. Fall. 
27. Coreopsis integrifolia Poir. Perennial. Stems erect, 6-9 dm. high, round or 
somewhat angled and corymbosely branched above, striate, leafy throughout : leaves oppo- 
site ; blades entire, glabrous at maturity, the margins and midrib as wellas the edges of 
the petioles, ciliate, at least when young, basal and lower stem-leaves petioled, their blades 
ovate, acute ; of the upper stem-leaves short-connate, petioled or sessile, ovate to elliptic- 
oblong, gradually reduced in size upward : heads 3-4 cm. broad including the rays : outer 
involucral bracts oblong, 4-6 mm. long, obtuse, ciliate ; the inner about twice as long as the 
outer, ovate, bluntly pointed : ray-flowers about 8 ; ligules obovate, 3-lobed at the apex. 
In moist soil, Georgia and Florida. Fall. 
28. Coreopsis helianthoides Beadle. Perennial. Stems erect, 5-12 dm. high, gla- 
brous, furrowed, freely branched above the middle: leaves alternate, sparingly pubescent 
with jointed hairs ; blades of the basal and lower stem-leaves long-petioled, entire, ovate 
to ovate-lanceolate, 2-6 cm. broad, acute, scarious-margined ; blades of the upper stem- 
leaves abruptly reduced, becoming mere scales on the branches: heads 3-4 cm. broad 
including the rays : outer involucral bracts lanceolate, 5-9 mm. long, the inner ovate, 8-12 
mm. long: ray-flowers about 8; ligules 3-lobed, the middle lobe rounded or notched : 
achenes oblong-spatulate, about 3 mm. long, bordered by a narrow irregularly pectinate 
wing : pappus a pair of short awns. 
In low grounds, southern Georgia and northern Florida. Fall. 
29. Coreopsis nudàta Nutt. Perennial, glabrous throughout. Stems erect, 6-12 
dm. high, terete, flexuous, striate, corymbosely-branched near the summit: leaves terete, 
rush-like ; the basal and lower stem-leaves 7-30 cm. long, the upper stem-leaves subulate, 
minute: heads 4-6 cm. broad including the rays: outer involucral bracts lanceolate, 4-6 
mm. long, the inner ovate, about 1 em. long: ligules pink, obovate-cuneate, with three 
rounded lobes at the apex: achenes oblong-elliptic, about 3 mm. long, bordered by an 
irregularly lacerate wing : pappus a pair of minute awns. 
In wet pine lands, southern Georgia and Florida. Spring and summer. 
105. BIDENS L.! 
Erect branching herbs, ours all annual or biennial. Leaves opposite, or the upper 
sometimes alternate: blades simple or divided. Heads numerous, radiate or rarely dis- 
coid, each with a double involucre, the outer one foliaceous, the inner scarious and appressed. 
Receptacle flat or nearly so, chaffy. Ray-flowers neutral, the ligules white or yellow. 
Disk-flowers perfect, fruit-producing. Achenes firm, flat, 4-angled or nearly terete, beak- 
less. Pappus of 2-4 rigid barbed awns or teeth, or rarely none. BEGGAR-TICKS. BuR- 
MARIGOLD. 
Achenes spindle-shaped, gradually tapering above : ligules of the ray-flowers nearly white. | 
Leaves 1-3-pinnately fame ths divisions incised or lobed ; ray-flowers with 5 omen en- 
tire ligules. i : D. . 
Leaves 1-pinnate or undivided, the segments regularly serrate: ray-flowers with ^ Ur ic 
Showy and lobed ligules. - D. leucantha. 
Achenes flattened, broadest above the middle: ligules of the ray-flowers yellow. 
Rays inconspicuous and ee or Want. ^ 
ves usually undivi : pappus-awns 3 or 4. 
Disk-corollas pale, Soho: Co strongly, retrorsely barbed 
throughout; involucre long. i - 
Disk-corollas orange, 5-lobed: barbs of the achene-margins few, directed 
both ways: involuere short. 
Leaves 3-5-divided : pappus-awns 2. 
Awns long, usually retrorsely barbed : achenes 6-8 mm. long. b d» 
Outer involucral bracts 10-16, ciliate, the inner constricted at the tip: 
3. B. comosa. 
4. B. connata. 
5. B. vulgata. 
corollas pale. x ? 
i t constricted : corollas 
Outer bracts 6-8, nearly glabrous, the inner not co b e ia 
orange. : 
$ - $ : leaf-blades long-acumi- 
Aw a = erect-barbed : achenes 4.5 mm. long: le EO ust 
———— 
! Contributed by Dr. Karl M. Wiegand. 
