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Helianthus decapetalus
Also called Thin Leaved Sunflower, Ten Petals Sunflower, Forest Sunflower, Ten Rayed Sunflower, Thin Leaf Sunflower, Ten Petal Sunflower, Pale Sunflower
Thinleaf sunflower is a native North American perennial wildflower that grows in woodland edges and floodplains, bearing yellow daisy-like flowers in late summer to early fall. It suits naturalistic or woodland-edge gardens rather than formal beds, and is grown more as a wildflower than a houseplant.
Helianthus decapetalus, known by the common names thinleaf sunflower, thin-leaved sunflower, and woodland sunflower, is a perennial forb in the family Asteraceae. It is native to the Eastern and Central United States and Canada, from New Brunswick west to Iowa, Wisconsin, and Ontario, south as far as Georgia and Louisiana. It produces yellow composite flowers in late summer or early fall.
The name decapetalus means "with ten petals", referring to the 8-12 ray florets on the flower heads, resembling petals.
In Virginia, it grows in habitats such as floodplain forests and riverbanks. Its native habitats include woodland and forest edges. The presence of this species is dependent on appropriate habitat, and it may be eliminated from an area by development, changes in land use, or competition with invasive species.
Southeastern sunflower · Helianthus ambiguus · Swamp sunflower · Common sunflower · Western sunflower · Silverleaf sunflower · Arizona sunflower · Purpledisk sunflower · Serpentine sunflower · Helianthus brevifolius · California sunflower · Lakeside sunflower
Text excerpted from the Wikipedia article Helianthus decapetalus by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
