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leafstem tickseed

bigflower coreopsis, bigleaf tickseed, large-flower tickseed

Habit Annuals, (5–)12–30(–50) cm. Perennials, 40–60+ cm.
Leaves

lobes linear, 3–30 × 0.5–3 mm.

mostly cauline on proximal 2/3–7/8 of plant heights;

petioles 0 or 10–35+ mm;

blades usually 1(–2)-irregularly pinnately or ± pedately lobed with (3–)5–9+ lobes, rarely simple, simple blades or terminal lobes narrowly lanceolate to linear or filiform, 15–45(–90+) × (0.5–)2–8(–12+) mm.

Peduncles

5–25+ cm.

8–15(–25+) cm.

Ray florets

(5–)8+;

laminae 12–20(–30) mm.

Ray laminae

yellow, 12–25+ mm.

Disc florets/Disc corollas

(12–)40–100+;

corollas 4–6.6 mm.

3.3–4.8 mm, apices yellow.

Phyllaries

(5–)8, lance-ovate to lanceolate, 6–10+ mm.

lance-ovate, 7–9(–12) mm.

Calyculi

of 3–5 ovate-deltate bractlets (3–)4–6 mm.

of lanceolate to linear bractlets 3.5–9+ mm.

Cypselae

2–3+ mm, wings spreading, ± chartaceous, entire or irregularly toothed to pectinate.

Disc cypselae

oblanceolate to linear, 5–6 mm;

pappi 3–4(–5) mm.

Ray cypselae

± oblong, 4–6 mm.

Paleae

seldom basally adnate to and falling with disc cypselae.

Aerial

nodes proximal to first peduncle usually 6–10+, distalmost 1–3 internodes 4–7+ cm.

2n

= 24.

= 26 (+ 0–2B).

Coreopsis calliopsidea

Coreopsis grandiflora

Phenology Flowering Feb–Jun. Flowering May–Aug.
Habitat Alkaline playas, flood plains, deep sands Sandy soils, ditches and roadsides, other disturbed sites, granite and sandstone outcrops
Elevation 100–1000 m (300–3300 ft) 30–300+ m (100–1000+ ft)
Distribution
from FNA
CA
[WildflowerSearch map]
from FNA
AL; AR; CT; FL; GA; IA; IL; IN; KS; KY; LA; MD; ME; MI; MO; MS; NC; NJ; NM; NY; OH; OK; PA; RI; SC; TN; TX; VA; VT; WI; WV; ON; QC
[WildflowerSearch map]
[BONAP county map]
Discussion

Coreopsis grandiflora var. inclinata J. R. Allison from glades in Alabama may merit recognition.

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

Source FNA vol. 21, p. 188. FNA vol. 21, p. 194.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Coreopsidinae > Coreopsis > sect. Pugiopappus Asteraceae > tribe Heliantheae > subtribe Coreopsidinae > Coreopsis > sect. Coreopsis
Sibling taxa
C. auriculata, C. basalis, C. bigelovii, C. californica, 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, C. verticillata
C. auriculata, C. basalis, C. bigelovii, C. californica, C. calliopsidea, C. delphiniifolia, C. douglasii, C. gigantea, C. gladiata, 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 Agarista calliopsidea C. grandiflora var. harveyana, C. grandiflora var. longipes, C. grandiflora var. saxicola, C. saxicola
Name authority (de Candolle) A. Gray: in W. H. Emory, Rep. U.S. Mex. Bound. 2(1): 90. (1859) Hogg ex Sweet: Brit. Fl. Gard. 2: plate 175. (1826)
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