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The 'Helianthus' L. genus comprises 67 species and several subspecies in the Asteraceae family, all of which are native to North America, with some species (particularly ''Helianthus annuus'' (sunflower) and ''Helianthus tuberosus'' (Jerusalem artichoke)) cultivated in Europe and other parts of the world as food crops and ornamental plants.
These are usually tall, annual or perennial plants, growing to a height of 60-390 cm. The rough and hairy stem is branched in the upper part. The petiolate leaves are dentate and often sticky. The lower leaves are opposite, ovate or often heart-shaped. The upper leaves are alternate and narrower.
They bear several to many wide, terminal capitula (flower heads), with bright yellow ray florets at the outside and maroon disc florets inside. These flower heads follow the direction of the sun, going from east to west during the day.
''Helianthus'' species are used as food plants by the larvae of some Lepidoptera species - see list of Lepidoptera which feed on Helianthus.

Contents

Species

External links

Species

★ ''Helianthis agrestis'' : Southeastern Sunflower

★ ''Helianthus angustifolius'' : Swamp Sunflower

★ ''Helianthus annuus'' : Sunflower, Mirasol

★ ''Helianthus anomalus'' : Western Sunflower

★ ''Helianthus argophyllus'' : Silverleaf Sunflower

★ ''Helianthus arizonensis'' : Arizona Sunflower

★ ''Helianthus atrorubens''

★ ''Helianthus bolanderi'' : Serpentine Sunflower

★ ''Helianthus californicus'' : California Sunflower

★ ''Helianthus carnosus'' : Lakeside Sunflower

★ ''Helianthus ciliaris'' : Texas Blueweed

★ ''Helianthus cinereus''

★ ''Helianthus cusickii'' : Cusick's Sunflower

★ ''Helianthus debilis'' : Cucumberleaf Sunflower

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★ ''Helianthus debilis'' ssp. ''cucumerifolius'' : Cucumberleaf Sunflower

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★ ''Helianthus debelis'' ssp. ''debilis'' : Beach Sunflower, Dune Sunflower

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★ ''Helianthus debilis'' ssp. ''silvestris'' : Cucumberleaf Sunflower

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★ ''Helianthus debilis'' ssp. ''tardiflorus'' : Cucumberleaf Sunflower

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★ ''Helianthus debilis'' ssp. ''vestitus'' : Cucumberleaf Sunflower

★ ''Helianthus decapetalus'' : Thinleaf Sunflower

★ ''Helianthus deserticola''

★ ''Helianthus divaricatus''

★ ''Helianthus eggertii'' : Eggert's Sunflower

★ ''Helianthus floridanus'' : Florida Sunflower

★ ''Helianthus giganteus''

★ ''Helianthus glaucophyllus'' : Whiteleaf Sunflower


★ ''Helianthus gracilentus'' : Slender Sunflower

★ ''Helianthus grosseserratus''

★ ''Helianthus heterophyllus'' : Variableleaf Sunflower

★ ''Helianthus hirsutus''

★ ''Helianthus laciniatus'' : Alkali Sunflower

★ ''Helianthus laetiflorus''

★ ''Helianthus laevigatus'' : Smooth Sunflower

★ ''Helianthus longifolius'' : Longleaf Sunflower

★ ''Helianthus maximiliani'' : Maximillian Sunflower

★ ''Helianthus microcephalus'' : Small Woodland Sunflower

★ ''Helianthus mollis''

★ ''Helianthus multiflorus''

★ ''Helianthus neglectus'' : Neglected Sunflower

★ ''Helianthus niveus''

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★ ''Helianthus niveus'' ssp. ''canescens'' : Showy Sunflower

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★ ''Helianthus niveus'' ssp. ''tephrodes'' : Algodones Sunflower


★ ''Helianthus nuttallii''

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★ ''Helianthus nuttallii'' ssp. ''nuttallii'' : Nuttall's Sunflower

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★ ''Helianthus nuttallii'' ssp. ''parishii'' : Parish's Sunflower

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★ ''Helianthus nuttallii'' ssp. ''Rydbergii'' : Rydberg's Sunflower

★ ''Helianthus occidentalis'' : Fewleaf Sunflower

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★ ''Helianthus occidentalis'' ssp. ''occidentalis'' : Fewleaf Sunflower

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★ ''Helianthus occidentalis'' ssp. ''plantagineus'' : Fewleaf Sunflower

★ ''Helianthus paradoxus'' : Paradox Sunflower

★ ''Helianthus pauciflorus''

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★ ''Helianthus pauciflorus'' ssp. ''pauciflorus'' : Stiff Sunflower

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★ ''Helianthus pauciflorus'' ssp. ''subrhomboideus'' : Stiff Sunflower

★ ''Helianthus petiolaris''

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★ ''Helianthus petiolaris'' ssp. ''fallax'' : Prairie Sunflower

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★ ''Helianthus petiolaris'' ss. petiolaris : Prairie Sunflower

★ ''Helianthus porteri'' : Porter's Sunflower

★ ''Helianthus praecox''

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★ ''Helianthus praecox ssp. hirtus'' : Texas Sunflower

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★ ''Helianthus praecox ssp. praecox'' : Texas Sunflower

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★ ''Helianthus praecox ssp. runyonii'' : Runyon's Sunflower

★ ''Helianthus praetermissus'' : New Mexico Sunflower

★ ''Helianthus pumilus'' : Little Sunflower

★ ''Helianthus radula'' : Rayless Sunflower

★ ''Helianthus resinosus'' : Resindot Sunflower

★ ''Helianthus salicifolius'' : Willowleaf Sunflower

★ ''Helianthus schweinitzii'' : Schweinitz's Sunflower

★ '' Helianthus silphioides'' : Rosinweed Sunflower

★ ''Helianthus simulans'' : Muck Sunflower

★ ''Helianthus smithii'' : Smith's Sunflower

★ ''Helianthus strumosus'' : Paleleaf Woodland Sunflower

★ ''Helianthus tuberosus'' : Jerusalem Artichoke, Sunchoke

External links

★ See here for a more complete list of species