The open plant encyclopedia
Snap a photo or search by any name to see how to care for it, where it comes from, whether it's safe, and a 3D model you can turn.
The plants people record most in your country, and ones that grow there wild.
Filter by what you want to do, shape, origin, country, care and safety.
Helianthus angustifolius
Also called Narrow Leaf Sunflower
Narrowleaf or swamp sunflower is a perennial herb native to the eastern and south-central US, grown for its bright yellow daisy-like flowers. It thrives in moist ground but tolerates drier, well drained soil, though it is not especially drought resistant.
Helianthus angustifolius is a species of sunflower known by the common name narrowleaf sunflower or swamp sunflower. It is native to the south-central and eastern United States, found in all the coastal states from Texas to Long Island, and inland as far as Missouri. It is typically found in the coastal plain habitat (both the Atlantic and Gulf), particularly in wet areas. Although, in general, this species prefers low, moist ground, it is tolerant of conditions varying from bogs and swamps near sea level to relatively dry, well drained, gravelly clay. It is not particularly drought resistant.
Helianthus angustifolius is often cultivated for its bright, showy yellow flowers. Leaves are long and narrow, up to 15 centimetres (5.9 in) long. It is a perennial herb sometimes as much as 150 centimetres (59 in) tall.
Helianthus angustifolius is insect pollinated and is recorded to have been visited in northern Florida by Agapostemon splendens, Andrena accepta, Augochloropsis metallica, Augochloropsis sumptuosa, Bombus bimaculatus, Bombus impatiens, Dieunomia heteropoda, Epeolus lectoides, Halictus poeyi/ligatus, Lasioglossum pectorale, Megachile mendica, Megachile pseudobrevis, Melissodes boltoniae, Melissodes dentiventris, Melissodes druriellus, Melissodes trinodis, Paranthidium jugatorium, Perdita bequaerti, Pseudopanurgus rugosus, Pseudopanurgus solidaginus, and Svastra aegis.
Southeastern sunflower · Helianthus ambiguus · Common sunflower · Western sunflower · Silverleaf sunflower · Arizona sunflower · Purpledisk sunflower · Serpentine sunflower · Helianthus brevifolius · California sunflower · Lakeside sunflower · Texas blueweed
Text excerpted from the Wikipedia article Helianthus angustifolius 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.
Pet safety from the ASPCA toxic and non-toxic plant lists.
