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Helianthus angustifolius

Summary

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.

Helianthus angustifolius

Secure  (NatureServe)
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Helianthus
Species:
H. angustifolius
Binomial name
Helianthus angustifolius
Synonyms[1]
  • Coreopsis angustifolia L. 1753 not Ait. 1789
  • Discomela angustifolius Raf.

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 at least 75 disc florets.[4]

References edit

  1. ^ The Plant List, Helianthus angustifolius L.
  2. ^ "Helianthus angustifolius". Germplasm Resources Information Network. Agricultural Research Service, United States Department of Agriculture. Retrieved 19 January 2018.
  3. ^ Biota of North America Program 2014 county distribution map
  4. ^ Flora of North America, Helianthus angustifolius Linnaeus, 1753. Swamp sunflower

External links edit

  • United States Department of Agriculture Plants Profile
  • Photo of herbarium specimen at Missouri Botanical Garden, collected in Missouri in 1993