Helianthus angustifolius
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.[2][3] It is typically found in the coastal plain habitat (both the Atlantic and Gulf), particularly in wet areas.
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Helianthus angustifolius is often cultivated for its bright, showy yellow flowers. Leaves are long and narrow, up to 15 cm (6 inches) long. It is a perennial herb sometimes as much as 150 cm (5 feet) tall. One plant can produce 3-16 flower heads, each with 10-20 ray florets surrounding as least 75 disc florets.[4]
References
- The Plant List, Helianthus angustifolius L.
- "Helianthus angustifolius". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 19 January 2018.
- Biota of North America Program 2014 county distribution map
- Flora of North America, Helianthus angustifolius Linnaeus, 1753. Swamp sunflower
External links
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