Asteraceae
Rayless sunflower
Helianthus radula
- Family
- Asteraceae
- Genus
- Helianthus
Pet and kid safety: not checked yet. Check pet-safe plants
Is yours looking unwell? Scan your plant — free
Common names
By language (1)
- English
- Rayless sunflower
Synonyms
- Centrocarpha radula (Pursh) D.Don ex G.Don
- Echinomeria apetala Nutt.
- Rudbeckia apetala Torr. ex Nutt.
- Rudbeckia radula Pursh
Characteristics
- Growth habit
- Forb/herb
- Lifespan
- Perennial
- In the US and Canada
- Lower 48 states: native
Photos
Photo: Wikimedia Commons contributor, CC BY 4.0, from Wikimedia Commons Photo: Rachael Kirby, CC BY-SA 4.0, from Pl@ntNet via GBIF 
Photo: Scott Allen Davis, CC BY 4.0, from Wikimedia Commons 
Photo: Alex Abair, CC BY 4.0, from Wikimedia Commons 
Photo: Alex Abair, CC BY 4.0, from Wikimedia Commons 
Photo: Alex Abair, CC BY 4.0, from Wikimedia Commons 
Photo: Alex Abair, CC BY 4.0, from Wikimedia Commons 
Photo: Alex Abair, CC BY 4.0, from Wikimedia Commons 
Photo: Alex Abair, CC BY 4.0, from Wikimedia Commons 
Photo: Alex Abair, CC BY 4.0, from Wikimedia Commons
More in Helianthus
- Common sunflowerHelianthus annuusAsteraceae
- Jerusalem artichokeHelianthus tuberosusAsteraceae
- Stiff sunflowerHelianthus pauciflorusAsteraceae
- Cheerful sunflowerHelianthus × laetiflorusAsteraceae
- Prairie sunflowerHelianthus petiolarisAsteraceae
- Cucumberleaf sunflowerHelianthus debilisAsteraceae
- Paradox sunflowerHelianthus paradoxusAsteraceae
- Nuttall's sunflowerHelianthus nuttalliiAsteraceae
- Willowleaf sunflowerHelianthus salicifoliusAsteraceae
- Paleleaf woodland sunflowerHelianthus strumosusAsteraceae
- Swamp sunflowerHelianthus angustifoliusAsteraceae
- Silverleaf sunflowerHelianthus argophyllusAsteraceae
Sources: classification, synonyms from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0); common names, US characteristics from USDA PLANTS Database (2025-05-29, CC0 1.0). About our plant data.