Helianthus debilis subsp. silvestris Heiser

Cucumberleaf sunflower (en)

Subspecies

Angiosperms > Asterales > Asteraceae > Helianthus > Helianthus debilis

Characteristics

Stems erect, glabrate. Leaf blades (6–)8–14 cm, margins serrate, abaxial faces densely gland-dotted. Peduncles (relatively slender) 20–40 cm. Ray laminae 15–23 mm. Discs 14–15(–16) mm diam. 2n = 34.
Life form annual
Growth form herb
Growth support -
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.3 - 2.0
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) -
Germination temperacture (C°) 21
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Distribution

Helianthus debilis subsp. silvestris world distribution map, present in United States of America

Identifiers

LSID urn:lsid:ipni.org:names:119096-2
WFO ID wfo-0000091985
COL ID 5HM4Q
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Helianthus debilis var. silvestris Helianthus debilis subsp. silvestris