12.
Coreopsis major
Walter, Fl. Carol. 214. 1788.
Coreopsis major
var
. rigida
(Nuttall) F. E. Boynton;
C. major
var.
stellata
(Nuttall) B. L. Robinson
Perennials,
30—90 cm.
Internodes
(± mid stem) 5—11 cm.
Leaves:
petioles 0—1 mm; blades simple or 3-foliolate, simple blades or leaflets ± lance-elliptic to narrowly lanceolate, 25—55(—100+) × (4—)6—15(—30+) mm (seldom lobed).
Peduncles
2—6+ cm.
Calyculi
of 7—8 oblong to linear bractlets 3—6 mm.
Phyllaries
8, lance-oblong to lance-ovate, 6—8 mm.
Ray laminae
12—30+ mm.
Disc florets
40—80+; corollas yellow (often drying blackish to purplish), 6—7 mm.
Cypselae
obovate to oblong, 4—5 mm.
2
n
= 26, 78, 104.
Flowering May—Aug. Oak barrens, road clearings, wooded bottoms; 300—800 m; Ala., Fla., Ga., Ind., Ky., La., Mass., Miss., N.Y., N.C., Ohio, Pa., S.C., Tenn., Va., W.Va.
