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garden coreopsis, lance-leaf coreopsis, lance-leaf tick-seed, lanced-leaf coreopsis, sand coreopsis

thread-leaf tickseed, threadleaf coreopsis, whorled tickseed

Habit Perennials, 10–30(–60+) cm. Perennials, 20–60+ cm.
Leaves

basal and cauline on proximal 1/4–1/3(–1/2) of plant heights;

petioles 1–5(–8+) cm;

blades simple or with 1–2+ lateral lobes, simple blades or terminal lobes lance-ovate or lanceolate to oblanceolate or lance-linear, 5–12 cm × 8–15(–18+) mm.

petioles 0–1 mm;

blades usually 3-foliolate, simple blades or leaflets entire or each ± pedately divided with 3–9+, ± linear to filiform lobes 5–25(–45+) × 0.5–1(–2) mm.

Peduncles

(8–)12–20(–35+) cm.

2–5(–8+) cm.

Ray laminae

yellow, 15–30+ mm.

12–20+ mm.

Disc florets/Disc corollas

6–7.5 mm, apices yellow.

30–40+;

corollas yellow (sometimes drying blackish), 3.5–5.5 mm.

Phyllaries

deltate to lance-deltate, 8–12+ mm.

8, lance-ovate, 6–7 mm.

Calyculi

of lance-ovate to lance-linear or linear bractlets 4–8(–12) mm.

of 8 linear bractlets 3–5(–9) mm.

Cypselae

(2.6–)3–4 mm, wings ± spreading, ± chartaceous, entire.

obovate to oblong, 3.5–4 mm.

Aerial

nodes proximal to first peduncle usually 1–3(–5+), distalmost 1–3 internodes 1–2(–8+) cm.

Internodes

(± mid stem) 15–40(–60) mm.

2n

= 26 (+ 0–4B).

= 26, 52, 78.

Coreopsis lanceolata

Coreopsis verticillata

Phenology Flowering (Mar–)May–Jul(–Aug). Flowering Jun–Jul(–Aug).
Habitat Sandy soils, ditches and roadsides, other disturbed sites Oak wood, sandy soils
Elevation 30–500(–1000+) m (100–1600(–3300+) ft) 10–500 m (0–1600 ft)
Distribution
from FNA
AL; AR; FL; GA; IL; IN; KS; KY; LA; MD; MI; MO; MS; NC; NJ; NM; NY; OH; OK; PA; SC; TN; TX; VA; VT; WI; WV; BC; ON
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[BONAP county map]
from FNA
AL; AR; CT; DC; FL; GA; KY; MA; MD; MS; NC; NJ; NY; OH; SC; TN; VA; WV; ON; QC
[WildflowerSearch map]
[BONAP county map]
Discussion

Plants that have been called Coreopsis lanceolata var. villosa Michaux often have 5+ aerial internodes 6+ cm long proximal to the first peduncle; they may merit recognition as a distinct taxon or may be hybrids (or derivatives) from crosses between C. lanceolata and C. pubescens.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 21, p. 194. FNA vol. 21, p. 192.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Coreopsidinae > Coreopsis > sect. Coreopsis Asteraceae > tribe Heliantheae > subtribe Coreopsidinae > Coreopsis > sect. Gyrophyllum
Sibling taxa
C. auriculata, C. basalis, C. bigelovii, C. californica, C. calliopsidea, C. delphiniifolia, C. douglasii, C. gigantea, C. gladiata, C. grandiflora, C. hamiltonii, C. integrifolia, C. intermedia, C. latifolia, C. leavenworthii, C. major, C. maritima, C. nudata, C. nuecensis, C. palmata, C. pubescens, C. pulchra, C. rosea, C. stillmanii, C. tinctoria, C. tripteris, C. verticillata
C. auriculata, C. basalis, C. bigelovii, C. californica, C. calliopsidea, C. delphiniifolia, C. douglasii, C. gigantea, C. gladiata, C. grandiflora, C. hamiltonii, C. integrifolia, C. intermedia, C. lanceolata, C. latifolia, C. leavenworthii, C. major, C. maritima, C. nudata, C. nuecensis, C. palmata, C. pubescens, C. pulchra, C. rosea, C. stillmanii, C. tinctoria, C. tripteris
Name authority Linnaeus: Sp. Pl. 2: 908. (1753) Linnaeus: Sp. Pl. 2: 907. (1753)
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