Summary description from Wikipedia:

Helianthus radula in languages:

English

Rayless Sunflower

English

stiff sunflower

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Parent Taxon

• Helianthus

Sibling Taxa

• Helianthus agrestis
• Helianthus angustifolius
• Helianthus annuus
• Helianthus anomalus
• Helianthus argophyllus
• Helianthus arizonensis
• Helianthus atrorubens
• Helianthus bolanderi
• Helianthus californicus
• Helianthus carnosus
• Helianthus ciliaris
• Helianthus couplandii
• Helianthus cusickii
• Helianthus debilis
• Helianthus decapetalus
• Helianthus deserticola
• Helianthus devernii
• Helianthus dissectifolius
• Helianthus divaricatus
• Helianthus eggertii
• Helianthus exilis
• Helianthus floridanus
• Helianthus giganteus
• Helianthus glaucophyllus
• Helianthus gracilentus
• Helianthus grosseserratus
• Helianthus heterophyllus
• Helianthus hirsutus
• Helianthus inexpectatus
• Helianthus laciniatus
• Helianthus laevigatus
• Helianthus longifolius
• Helianthus maximiliani
• Helianthus microcephalus
• Helianthus mollis
• Helianthus mollissimus
• Helianthus multiflorus
• Helianthus navarri
• Helianthus neglectus
• Helianthus niveus
• Helianthus nuttallii
• Helianthus occidentalis
• Helianthus paradoxus
• Helianthus pauciflorus
• Helianthus petiolaris
• Helianthus porteri
• Helianthus praecox
• Helianthus praetermissus
• Helianthus pumilus
• Helianthus radula
• Helianthus resinosus
• Helianthus salicifolius
• Helianthus schweinitzii
• Helianthus silphioides
• Helianthus simulans
• Helianthus smithii
• Helianthus speciosus
• Helianthus strumosus
• Helianthus tuberosus
• Helianthus verticillatus
• Helianthus winteri
• Helianthus × alexidis
• Helianthus × ambiguus
• Helianthus × brevifolius
• Helianthus × cinereus
• Helianthus × divariserratus
• Helianthus × doronicoides
• Helianthus × glaucus
• Helianthus × intermedius
• Helianthus × kellermanii
• Helianthus × laetiflorus
• Helianthus × luxurians
• Helianthus × multiflorus

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