Flora of North America species comparison

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Coreopsis bigelovii

Coreopsis hamiltonii

Bigelow's tickseed

Mt. Hamilton tickseed
Habit Annuals, 3–20(–40+) cm. Annuals, (3–)10–20+ cm.
Leaf

lobes linear, 5–25 × 0.5–1(–2) mm.

lobes oblong to linear, 1–8(–15) × 0.5–1 mm.
Peduncles

2–20(–35+) cm.

3–9(–18) cm.
Ray florets

(3–)8+;

laminae (5–)12–20+ mm.

8;

laminae 3.5–8 mm.
Disc florets

(5–)50–100+;

corollas 2–4.5 mm.

ca. 40;

corollas 2.5–3.5 mm.
Phyllaries

(3–)8+, ± ovate to obovate, 6–10(–12+) mm.

8, ± lance-ovate, 4–8 mm.
Calyculi

of (1–)5–8 linear bractlets (1–)3–8+ mm.

of 3–5 oblong to linear bractlets 1–3(–5) mm.
Disc cypselae

oblanceolate to ± oblong, 5–6(–7) mm;

pappi 2–3 mm.

narrowly oblanceolate, 4–5 mm;

pappi ca. 1 mm.
Ray cypselae

± oblong, 5–6 mm.

narrowly obovate, 5–6 mm.
Paleae

basally adnate to and falling with disc cypselae.

seldom basally adnate to and falling with disc cypselae.
2n

= 24.

= 24.

Coreopsis bigelovii

Coreopsis hamiltonii
Phenology Flowering Feb–Jun. Flowering Mar–May.
Habitat Openings in chaparral, desert scrub, yellow-pine forests Talus slopes, rocky soils
Elevation 100–1800 m (300–5900 ft) 600–1300 m (2000–4300 ft)
Distribution
from FNA
CA
[WildflowerSearch map]
from FNA
CA
Source FNA vol. 21, p. 188. FNA vol. 21, p. 188.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Coreopsidinae > Coreopsis > sect. Pugiopappus Asteraceae > tribe Heliantheae > subtribe Coreopsidinae > Coreopsis > sect. Pugiopappus
Sibling taxa
C. auriculata, C. basalis, 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, C. verticillata
C. auriculata, C. basalis, C. bigelovii, C. californica, C. calliopsidea, C. delphiniifolia, C. douglasii, C. gigantea, C. gladiata, C. grandiflora, 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 Pugiopappus bigelovii Leptosyne hamiltonii
Name authority (A. Gray) Voss: Vilm. Blumengärtn. ed. 3, 1: 488. (1894) (Elmer) H. Sharsmith: Madroño 4: 214. (1938)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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