Rudbeckia occidentalis Nutt.

Western coneflower (en)

Species

Angiosperms > Asterales > Asteraceae > Rudbeckia

Characteristics

Perennials, to 200 cm (rhizomatous, roots fibrous). Leaves: green, blades broadly ovate to lanceolate (rarely lobed), herbaceous, bases attenuate to cuneate or broadly rounded, ultimate margins entire or serrate, apices acute, faces sparsely to densely hairy (mostly adaxially), rarely glabrous; basal petiolate, 12–30 × 3–9 cm; cauline petiolate or sessile, 5–25 × 2–10 cm. Heads in ± corymbiform arrays. Phyllaries to 3 cm (margins mostly ciliate, hairy, especially abaxially). Receptacles ovoid to columnar; paleae (proximally light brown, distally green, becoming maroon with age) 5–7 mm, apices acute to acuminate, abaxial tips densely hairy. Ray florets 0. Discs 17–45 × 12–20 mm. Disc florets 200–500+; corollas yellowish green proximally, blackish maroon distally, 4–6 mm; style branches ca. 1.2 mm, apices acute to rounded. Cypselae 3.5–5 mm; pappi coroniform, to 1.2 mm. 2n = 36.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) 0.5 - 1.0
Mature height (meter) 1.5 - 2.25
Root system fibrous-root
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light 4-9
Soil humidity 3-5
Soil texture 3-4
Soil acidity 4-8
Soil nutriment -
Hardiness (USDA) 6-8

Usage

Uses environmental use poison
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Can be grown by divisions or seedlings. Seeds needs stratification.
Mode divisions seedlings
Germination duration (days) 6 - 18
Germination temperacture (C°) 21
Germination luminosity light
Germination treatment stratification
Minimum temperature (C°) -18
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Leaf

Rudbeckia occidentalis leaf picture by Yang Chen (cc-by-sa)
Rudbeckia occidentalis leaf picture by Yang Chen (cc-by-sa)
Rudbeckia occidentalis leaf picture by Ethan Greer (cc-by-sa)

Flower

Rudbeckia occidentalis flower picture by Michael Finch (cc-by-sa)
Rudbeckia occidentalis flower picture by Ethan Greer (cc-by-sa)
Rudbeckia occidentalis flower picture by Ethan Greer (cc-by-sa)

Distribution

Rudbeckia occidentalis world distribution map, present in United States of America

Identifiers

LSID urn:lsid:ipni.org:names:241742-1
WFO ID wfo-0000003513
COL ID 4TMBQ
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Rudbeckia occidentalis Rudbeckia occidentalis var. occidentalis