16.
Coreopsis basalis
(A. Dietrich) S. F. Blake, Proc. Amer. Acad. Arts. 51: 525. 1916.
Calliopsis basalis
A. Dietrich, Allg. Gartenzeitung 3: 329. 1835;
Coreopsis basalis
var.
wrightii
(A. Gray) S. F. Blake;
C. wrightii
(A. Gray) H. M. Parker ex E. B. Smith
Annuals,
10—50+ cm.
Aerial nodes
proximal to first peduncle usually 5—10+, distalmost 1—3 internodes 4—7(—10) cm.
Leaves:
basal and cauline on proximal
3
/4—
7
/8 of plant heights; petioles 8—35(—120) mm; blades simple or 1(—2)-pinnately lobed with 3—9+ lobes, simple blades or terminal lobes elliptic or lanceolate to oblanceolate or linear, 25—55+ × (1—)2—9(—20) mm.
Peduncles
6—15+ cm.
Calyculi
of lance-deltate to linear bractlets 6—9(—12+) mm.
Phyllaries
lance-ovate, 7—9+ mm.
Ray laminae
yellow, usually each with a proximal, red-brown to purple spot or band, 15—20+ mm.
Disc corollas
3—4 mm, apices red-brown to purple.
Cypselae
1.2—1.8 mm, wingless (margins ± inrolled adaxially, ± corky).
2
n
= 26.
Flowering Apr—Jun. Sandy soils in open, often disturbed, places; 10—300+ m; Ala., Ark., Fla., Ga., La., Miss., N.C., Okla., S.C., Tex.
Plants in the western part of the distribution of
Coreopsis basalis
usually have narrower lobes of leaf blades and narrower outer phyllaries; such plants have been treated as
C. wrightii
or as
C. basalis
var.
wrightii
.
