This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol3", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
Perennial; stem hirsute or villous-pubescent below, ascending, little branched, 8'-2o' high. Leaves rather thick, hirsute or pubescent, all entire, the lower and basal ones petioled, oblong to obovate-spatulate, mostly very obtuse, 1'-3' long, 4"-10" wide; stem leaves few, short-peti-oled or sessile, obtuse or acutish, narrower; heads few, 1'-2' broad, borne on slender, puberulent peduncles often 1° long, similar to those of C. lanceolata, as are the rays, involucral bracts and achenes.
Dry soil, Illinois and Missouri to Kansas, Louisiana, east to South Carolina and Florida. May-Aug.
C. pubescens Ell. Bot. S. C. & Ga 2: 441. 1824.
Perennial; stem pubescent or puberulent, leafy, little branched or simple, erect, 2°-4° high. Leaves firm in texture, pubescent or glabrous, entire, or some of them 3-5-lobed or divided, the basal and lower ones slender-petioled, obovate-oval, obtuse, the upper short-petioled or sessile, broadly lanceolate or oblong, acute or acutish, 2-3' long; heads few, 1'-1 1/2' broad, long-peduncled; involucre depressed-hemispheric, glabrous, star-like, its lanceolate obtuse or acute outer bracts nearly as long as but much narrower than the ovate inner ones; rays 8-10, yellow, cuneate, lobed at •the apex; achenes similar to those of the preceding species or broader.
In dry woods, Virginia to Illinois and Missouri, south to Florida and Louisiana. June-Aug.
Coreopsis grandiflora Hogg; Sweet, Brit. Fl. Gard. 2: pl. 175. 1825-27.
Perennial; stem glabrous, usually branched above, 1°-3° high. Leaves, or most of them, 1-2-pinnately parted, or the lower entire and slender-petioled; segments of the lower stem leaves oblong, obtuse, the terminal one larger than the lateral; segments of most of the stem leaves linear or even filiform, petioles ciliate; heads commonly several, 1'-2' broad, long-pedun-cled; outer bracts of the involucre lanceolate, narrower and mostly somewhat shorter than the oval or ovate-lanceolate inner ones; rays 6-10, yellow, lobed; achenes oblong, broadly winged when mature, the projections on the inner face usually large; pappus of 2 short scales.
In moist soil, Kansas and Missouri to Texas, east to Georgia. May-Aug.
Coreopsis auriculata L. Sp. Pl 908. 1753.
Perennial; stoloniferous; stems weak, very slender, decumbent or ascending, 6'-\$' long, little branched, or simple, pubescent or hirsute, at least below, mostly glabrous above. Leaves thin, entire or pinnately 3-5-lobed or 3-5-divided, the terminal segment entire and much larger than the lateral ones, the lower and basal more or less pubescent, broadly oblong or nearly orbicular, with slender pubescent petioles; stem leaves few, peti-oled or sessile, mostly obtuse; heads 1'-1 1/2' broad, slender-peduncled; outer bracts of the involucre oblong to lanceolate, narrower than the mostly ovate and acute inner ones; rays 6-10, cuneate, about 4-toothed, yellow; achenes oval, narrowly winged, the wings involute and thick.
In woods, Virginia to Illinois, Kentucky, Florida and Louisiana. May-Aug.