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, 8-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 well as 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 belianthoides 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 nudata 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 cm. 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. bIlDENS L.i 



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 ]-3-pinnately dissected, the divisions incised or lobed ; ray-flowers with inconspicuous, en- 

 tire ligules. 1. B. bipinnata. 

 Le.aves 1-pinnate or undivided, the segments regularly serrate : ray-flowers with 



showy and lobed ligules. 2. B. leucantha. 



Achenes flattened, broadest above the middle: ligules of the ray-flowers yellow. 

 Rays inconspicuous and caducous or wanting. 

 Leaves usually undivided : pappus awns 3 or I. 



Disk-corollas pale. 4-lobed : achene-margins strongly, retrorsely barbed 



throughout; involucre long. 3. B. comosa. 



Disk-corollas orange, .5-lobed : barbs of the achene-margins few, directed 



both ways: involucre short. 4. B. connata. 



Leaves 3-.5-divided : pappus-awns 2. 



Awns long, usually retrorsely barbed : achenes 6-8 mm. long. 



Outer involucral bracts 10-16, ciliate, the inner constricted at the tip : 



corollas pale. .'>. B. vulc/ata. 



Outer bracts 6-8, nearly glabrous, the inner not constricted : corollas 



orange. 6. B.frandosa. 



Awns short, erect-barbed : achenes 4..5 mm. long : leaf-blades long-acumi- 

 nate. 7. B. discoidea. 



' Contributed by Dr. Karl M. Wiegand. 



