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hairy coreopsis, hairy tickseed, star tickseed

giant coreopsis

Habit Perennials, 20–70(–90+) cm. Subshrubs or shrubs (± pachycaul, fleshy), (10–)30–250+ cm.
Leaves

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

petioles 2–10(–25+) mm;

blades usually simple, rarely with 1–2(–3+) lateral lobes, simple blades or terminal lobes lance-elliptic to oblanceolate or lanceolate, 15–60(–80) × 2–25(–35) mm.

lobes mostly filiform, 10–35(–75) × 0.5–1(–2) mm.

Peduncles

(7–)12–15+ cm.

4–12(–18+) cm.

Ray florets

8–13+;

laminae 20–35+ mm.

Ray laminae

yellow, 12–15+ mm.

Disc corollas

4.6–5.4 mm, apices yellow.

5–6 mm.

Phyllaries

lance-ovate to lanceolate, 5–8+ mm.

8–14+, lance-ovate, 10–12+ mm.

Calyculi

of lanceolate to lance-linear bractlets 3–7 mm.

of 4–12+ ovate to linear bractlets (5–)7–12+ mm.

Heads

(1–)8–12+ per stem.

Cypselae

2.5–3 mm, wings ± spreading, ± chartaceous, entire.

oblong-obovate, 5–7 mm.

Aerial

nodes proximal to first peduncle usually (5–)6–12+, distalmost 1–3 internodes 4–6(–10+) cm.

2n

= 26 (+ 0–2B).

= 24.

Coreopsis pubescens

Coreopsis gigantea

Phenology Flowering (Apr–)Jun–Aug(–Sep). Flowering Jan–Jul.
Habitat Sandy soils, granite outcrops, open pine-oak woods, ditches and roadsides, other disturbed sites Coastal bluffs, dunes
Elevation 30–1000+ m (100–3300+ ft) 0–200 m (0–700 ft)
Distribution
from FNA
AL; AR; CT; FL; GA; IL; KS; KY; LA; MA; MO; MS; NC; OK; SC; TN; TX; VA; WV
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; Mexico (Baja California)
[WildflowerSearch map]
Discussion

Bushy to wiry, nearly glabrous plants with leaf blades mostly simple, mostly oblanceolate, and 2–15+ mm wide and with relatively small heads, florets, and fruits from coastal Mississippi and included here in Coreopsis pubescens may merit recognition as C. debilis Sherff or C. pubescens var. debilis.

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

Source FNA vol. 21, p. 195. FNA vol. 21, p. 187.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Coreopsidinae > Coreopsis > sect. Coreopsis Asteraceae > tribe Heliantheae > subtribe Coreopsidinae > Coreopsis > sect. Tuckermannia
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. lanceolata, C. latifolia, C. leavenworthii, C. major, C. maritima, C. nudata, C. nuecensis, C. palmata, 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. 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 C. pubescens var. debilis, C. pubescens var. robusta Leptosyne gigantea
Name authority Elliott: Sketch Bot. S. Carolina 2: 441. (1823) (Kellogg) H. M. Hall: Univ. Calif. Publ. Bot. 3: 142. (1907)
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