Helianthus carnosus Small

Lakeside sunflower (en)

Species

Angiosperms > Asterales > Asteraceae > Helianthus

Characteristics

Perennials, 10–60 cm, (with crown buds). Stems erect, (unbranched) glabrous, eglandular. Leaves mostly basal; opposite (proximal) or alternate; petioles obscure (intergrading with blades); blades lanceolate to lance-linear or linear, 10–25 × 0.5–1.5 cm, bases cuneate, margins entire, faces glabrous, not gland-dotted (cauline 1–5 pairs, smaller). Heads 1(–3). Peduncles 5–10 cm. Involucres broadly hemispheric, 17–25 mm diam. Phyllaries (green with purple veins) 25–30, ovate to lance-ovate, 8–16 × 3–5 mm, apices acuminate, abaxial faces usually glabrous, sometimes puberulent. Paleae 8–9 mm, 3-toothed (middle teeth long-acuminate). Ray florets 12–17; laminae 20–40 mm, (abaxial faces not gland-dotted) . Disc florets 100+; corollas 6–6.5 mm, lobes yellow; anthers dark, appendages yellowish or dark. Cypselae 3 mm, glabrous; pappi of 2 aristate scales 1.5–2 mm plus 2–4 erose scales 0.3–0.6 mm. 2n = 34.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.1 - 0.6
Root system -
Rooting depth (meter) -
Root diameter (meter) 0.6
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) -

Usage

Uses gene source
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 -

Distribution

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

Identifiers

LSID urn:lsid:ipni.org:names:119075-2
WFO ID wfo-0000037051
COL ID 6LHPR
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Helianthus carnosus