Helianthus anomalus S.F.Blake

Western sunflower (en)

Species

Angiosperms > Asterales > Asteraceae > Helianthus

Characteristics

Annuals, 25–60 cm. Stems erect, sparsely hispid. Leaves mostly cau-line; mostly alternate; petioles 1.2–5 cm; blades ovate to lance-ovate, 4.5–13 × 1–4 cm, bases cuneate, margins entire, abaxial faces sparse-ly hispid, not gland-dotted. Heads usually borne singly. Peduncles 4–9 cm. Involucres hemispheric, 20–27 mm diam. Phyllaries 11–23, laceolate to lance-linear or lance-ovate , 17–33 × 1–2.9 mm (notably surpassing discs), (margins ± ciliate ) apices attenuate, abaxial faces usually sparsely hispid to hispidulous. Paleae 7–8 mm, apices 3-toothed (middle teeth attenuate, apices purplish, ± hispid). Ray florets 7–12; laminae 18–37 mm. Disc florets 25+; corollas 6.8–7.5 mm, lobes reddish; anthers dark, appendages dark (style branches reddish). Cypselae 4.6–9 mm, appressed hairy; pappi of 2 linear scales 2–4.5 mm plus 4–6 scales 1–3.5 mm. 2n = 34.
Life form annual
Growth form herb
Growth support free-standing
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.25 - 0.6
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

Light 7-9
Soil humidity 3-7
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) 4-10

Usage

Uses fodder gene source medicinal
Edible -
Therapeutic use Dermatological Aid (unspecified)
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 anomalus unspecified picture

Distribution

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

Conservation status

Helianthus anomalus threat status: Vulnerable

Identifiers

LSID urn:lsid:ipni.org:names:119042-2
WFO ID wfo-0000038594
COL ID 6LHNL
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Helianthus anomalus