Coreopsis tinctoria
Coreopsis nuecensis
atkinson's coreopsis, calliopsis, Columbia coreopsis, coreopsis, golden tick-seed, plains coreopsis
crown tickseed
proximal blades usually 1(–3)-pinnate, terminal lobes lance-ovate to oblanceolate, 10–60 × 5–25 mm;
cauline blades usually 1–2(–3)-pinnate, rarely simple, simple blades or terminal lobes lance-linear to linear or filiform, 10–45 × 0.5–2(–5+) mm.
basal and cauline on proximal 1/5–1/3(–1/2) of plant heights;
petioles 1–8+ cm;
blades simple or 1(–2)-pinnately lobed, simple blades or terminal lobes ± elliptic to lanceolate, 10–30 × 5–15 mm.
1–5(–15+) cm.
(5–)10–25+ cm.
usually yellow with red-brown blotch, sometimes red-brown in proximal 1/3–9/10 and distally yellow, rarely yellow throughout, 12–18+ mm.
yellow, usually each with (2–)4–8+ proximal, red-brown or purple flecks, 12–18+ mm.
2.5–3+ mm.
2.5–3.2 mm, apices yellow.
± lance-oblong to lance-ovate, 4–7(–9) mm.
lance-oblong, 6–8(–10+) mm.
of deltate-lanceolate bractlets 1–3+ mm.
of ± deltate to lance-oblong bractlets 4–6(–8) mm.
1.5–3(–4+) mm, wings 0 or 0.1–0.7+ mm wide;
pappi 0, or of 1–2 cusps or subulate scales 0.1–1+ mm.
2.5–4 mm, wings spreading, ± chartaceous, entire.
nodes proximal to first peduncle usually 1–3(–5), distalmost 1–3 internodes 2–4(–9+) cm.
= 24 (+ 0–2 Bs).
= 12, 14, 18, 20.
Coreopsis tinctoria
Coreopsis nuecensis
Coreopsis tinctoria is widely grown in public and residential gardens, and commercially (for cut flowers), and has become widely established in the flora area.
As here circumscribed, Coreopsis tinctoria includes plants that others (without agreement among themselves) have treated as distinct species or infraspecific taxa: C. atkinsoniana (plants mostly 50–150+ cm, seldom branched from bases; cypselae 2.5–3 mm, “narrowly” winged; pappi 0.1–0.2 mm; mostly Idaho, Montana, Oregon, Washington), C. cardaminefolia (plants mostly 20–50 cm, seldom branched at bases; cypselae 2 mm, “narrowly to widely” winged; pappi 0 or 0.1–0.2 mm; mostly Arkansas, Kansas, Louisiana, Nebraska, Oklahoma, Texas), and C. tinctoria var. similis (plants mostly 10–30 cm, usually branched from bases; cypselae 2–3 mm, “widely” winged; pappi 0.2–1 mm; Texas and Mexico).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Coreopsis nuecensis is probably in Mexico (Tamaulipas) and was collected once in Florida (“Escaped from cultivation”). Plants with glabrous phyllaries and chromosome numbers of 2n = 18 and 20 and included here in C. nuecensis have been called C. nuecensoides.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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