Asteraceae
Giant sunflower
Helianthus giganteus
- Family
- Asteraceae
- Genus
- Helianthus
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Common names
By language (4)
- Arabic
- دوار الشمس العملاق
- Chinese
- 大向日葵
- English
- Giant sunflower, Tall sunflower
- Finnish
- Roima-auringonkukka
Synonyms
- Helianthus alienus E.Watson
- Helianthus borealis E.Watson
- Helianthus giganteus subsp. alienus (E.Watson) Long
- Helianthus giganteus subsp. giganteus
- Helianthus giganteus var. giganteus
- Helianthus giganteus var. subtuberosus Britton
- Helianthus nuttallii var. subtuberosus (Britton) B.Boivin
- Helianthus subtuberosus (Britton) Britton
- Helianthus validus E.Watson
Characteristics
- Growth habit
- Forb/herb
- Lifespan
- Perennial
- In the US and Canada
- Canada: native, Lower 48 states: native
Photos
Photo: Joe deSousa, CC0, from Wikimedia Commons 
Photo: Joe deSousa, CC0, from Wikimedia Commons 
Photo: Joshua Mayer, CC BY-SA 2.0, from Wikimedia Commons 
Photo: Oceancetaceen - Alice Chodura, CC BY-SA 3.0, 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.