Helianthus eggertii Small

Eggert's sunflower (en)

Species

Angiosperms > Asterales > Asteraceae > Helianthus

Characteristics

Perennials, 30–200+ dm (rhi-zomatous). Stems erect, glabrous (distinctively bluish, glacous). Leaves cauline; all or mostly opposite; sessile; blades (1-nerved) lanceolate to lance-ovate, 7–16.5 × 1.5–3.5 cm, bases cuneate, margins entire or serrulate, faces glabrous (abaxial) or strumose (adaxial), gland-dotted. Heads 1–5. Peduncles 1–4 cm. Involucres hemispheric, 10–25 mm diam. Phyllaries 30–38, lance-olate, 12–16 × 3.5–4.5 mm, (margins ciliate) apices acuminate, abaxial faces glabrate, not gland-dotted. Paleae 9–11 mm, entire or ± 3-toothed (apices deltate). Ray florets 10–18; laminae 15–20 mm. Disc florets 70+; corollas 5–7 mm, lobes yellow; anthers dark, appendages dark or ± yellowish. Cypselae 4–6 mm, glabrous; pappi of 2 aristate scales 3–4 mm plus 0–1 deltate scales 0.5–1 mm. 2n = 102.
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Fibrous-rooted perennial from long rhizomes; stems 1–2 m, glabrous and glaucous; lvs mostly or all opposite, glabrous or nearly so above, glabrous and stronglyglaucous beneath, lanceolate, mostly 9–15 × 1.5–3.5 cm, entire or serrulate, tapering to a sessile or subsessile base; heads rather few, on long peduncles often 1–1.5 dm; disk yellow, 1.2–2 cm wide; invol bracts firm, lance-acuminate, ciliolate, about equaling the disk; rays 10–14, to 2 cm; 2n=102. Rocky hills and barrens; ec. Ky. to c. Tenn. Aug., Sept.
Life form perennial
Growth form herb
Growth support -
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.3 - 2.0
Root system fibrous-root rhizome
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light 7-9
Soil humidity 3-7
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) 4-9

Usage

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

Cultivation

Mode -
Germination duration (days) 10 - 14
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Helianthus eggertii unspecified picture

Distribution

Helianthus eggertii world distribution map, present in United States of America

Identifiers

LSID urn:lsid:ipni.org:names:119120-2
WFO ID wfo-0000119191
COL ID 3K5VX
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Helianthus eggertii