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

Stillman's tickseed

Habit Perennials, 10–30(–60+) cm. Annuals, 5–20+ 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 1(–2)-pinnately lobed, terminal lobes spatulate to narrowly oblanceolate, 1–3 mm wide.

Peduncles

(8–)12–20(–35+) cm.

5–12(–20+) cm.

Ray florets

5–8;

laminae 8–12(–15+) mm.

Ray laminae

yellow, 15–30+ mm.

Disc florets/Disc corollas

6–7.5 mm, apices yellow.

12–30+;

corollas 2.5–3.5 mm.

Phyllaries

deltate to lance-deltate, 8–12+ mm.

(5–)8, ovate to lance-ovate, 4–5(–7) mm.

Calyculi

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

of 5–7+ oblong to linear bractlets 4–8(–10) mm, ciliolate near bases.

Cypselae

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

± obovate, 4–5 mm, not marked adaxially with red, wings corky-thickened, faces smooth or ± 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 stillmanii

Phenology Flowering (Mar–)May–Jul(–Aug). Flowering Mar–May.
Habitat Sandy soils, ditches and roadsides, other disturbed sites Rocky slopes, serpentine ridges
Elevation 30–500(–1000+) m (100–1600(–3300+) ft) 400–800 m (1300–2600 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
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
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. 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. tinctoria, C. tripteris, C. verticillata
Synonyms Leptosyne stillmanii
Name authority Linnaeus: Sp. Pl. 2: 908. (1753) (A. Gray) S. F. Blake: Proc. Amer. Acad. Arts 49: 342. (1913)
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