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Helianthus praecox subsp. runyonii (Heiser) Heiser

Runyon's sunflower (en)

Subspecies

Angiosperms > Asterales > Asteraceae > Helianthus > Helianthus praecox

Characteristics

Stems erect, branches ascending, moderately hirsute. Leaves (larger) 3–7.5(–8) cm. Peduncles 20–30(–35) cm. Phyllary apices short-attenuate. Paleae: middle teeth white-villous ("bearded"). Rays 11–13(–14). 2n = 34.
Life form annual
Growth form herb
Growth support -
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.4 - 1.5
Root system -
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) -

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 -

Distribution

Helianthus praecox subsp. runyonii world distribution map, present in United States of America

Identifiers

LSID urn:lsid:ipni.org:names:119228-2
WFO ID wfo-0000079012
COL ID 5HM5G
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Helianthus praecox subsp. runyonii Helianthus praecox var. runyonii Helianthus debilis subsp. runyonii
WorldFloraDB 2024