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

Douglas' tickseed

Habit Perennials, 10–30(–60+) cm. Annuals, 5–15(–25+) 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.

blades simple or pinnately lobed, terminal lobes filiform, 0.5–1+ mm wide.

Peduncles

(8–)12–20(–35+) cm.

5–15(–20+) cm.

Ray florets

(5–)8(–9+);

laminae 5–12(–16+) mm.

Ray laminae

yellow, 15–30+ mm.

Disc florets/Disc corollas

6–7.5 mm, apices yellow.

8–60(–100+);

corollas 2.8–3.5 mm.

Phyllaries

deltate to lance-deltate, 8–12+ mm.

(5–)8, ovate, 5–7+ mm.

Calyculi

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

of (3–)5 linear bractlets 3–5(–12) mm, not ciliolate near bases.

Cypselae

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

± oblanceolate, 3.5–4+ mm, not marked adaxially with red dots or dashes, wings usually thin, sometimes corky-thickened, faces usually smooth, rarely tuberculate, not hirtellous.

Aerial

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

2n

= 26 (+ 0–4B).

= 24.

Coreopsis lanceolata

Coreopsis douglasii

Phenology Flowering (Mar–)May–Jul(–Aug). Flowering Mar–May.
Habitat Sandy soils, ditches and roadsides, other disturbed sites Shale and serpentine slopes, sandy flats
Elevation 30–500(–1000+) m (100–1600(–3300+) ft) (150–)300–1000 m ((500–)1000–3300 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
CA
[WildflowerSearch 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. 189.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Coreopsidinae > Coreopsis > sect. Coreopsis Asteraceae > tribe Heliantheae > subtribe Coreopsidinae > Coreopsis > sect. Leptosyne
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. 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, C. verticillata
Synonyms Leptosyne douglasii
Name authority Linnaeus: Sp. Pl. 2: 908. (1753) (de Candolle) H. M. Hall: Univ. Calif. Publ. Bot. 3: 140. (1907)
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