Helianthus angustifolius

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Helianthus angustifolius
Helianthus angustifolius 2.jpg
Status TNC G5.svg
Secure  (NatureServe)
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Helianthus
Species:
H. angustifolius
Binomial name
Helianthus angustifolius
L.
Synonyms [1]
  • Coreopsis angustifoliaL. 1753 not Ait. 1789
  • Discomela angustifoliusRaf.

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. 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. [4] It is not particularly drought resistant. [5]

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. One plant can produce 3-16 flower heads, each with 10-20 ray florets surrounding at least 75 disc florets. [6]

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<i>Helianthus cusickii</i> Species of sunflower

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<i>Helianthus occidentalis</i> Species of sunflower

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<i>Helianthus petiolaris</i> Species of sunflower

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<i>Helianthus debilis</i> Species of sunflower

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<i>Helianthus decapetalus</i> Species of sunflower

Helianthus decapetalus, known by the common names thinleaf sunflower and thin-leaved 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.

<i>Helianthus atrorubens</i> Species of sunflower

Helianthus atrorubens is a North American species of sunflower known by the common name purpledisc sunflower. It is native to the southeastern United States. It is found in all the coastal states from Louisiana to Virginia, plus the inland states of Kentucky and Tennessee.

Helianthus floridanus is a species of sunflower known by the common name Florida sunflower. It is native to the southeastern United States, found in all the coastal states from Alabama to North Carolina, plus Louisiana.

Helianthus heterophyllus is a species of sunflower known by the common names variableleaf sunflower and wetland sunflower. It is native to the coastal plain of the southern United States from Texas to North Carolina.

<i>Helianthus mollis</i> Species of sunflower

Helianthus mollis is a species of sunflower known by the common names ashy sunflower, hairy sunflower or downy sunflower. It is widespread across much of the United States and Canada, primarily the Great Lakes region from Ontario south to Texas and Alabama. Additional populations are found in the states of the Atlantic Coast from Maine to Georgia, but these appear to be introduced.

Helianthus resinosus is a North American species of sunflower known by the common name resindot sunflower. It is native to the southeastern United States from Mississippi to North Carolina.

<i>Helianthus salicifolius</i> Species of sunflower

Helianthus salicifolius is a North American species of sunflower known by the common name willowleaf sunflower. It is native to the central United States, primarily in the Great Plains and Ozark Plateau. There are a few reports of scattered populations in the Northeast and Midwest parts of the country, but these appear to be escapes from cultivation.

References

  1. "Helianthus angustifolius L." The Plant List. Archived from the original on 26 July 2020. Retrieved 4 July 2015.
  2. "Helianthus angustifolius". Germplasm Resources Information Network . Agricultural Research Service, United States Department of Agriculture . Retrieved 19 January 2018.
  3. "Helianthus angustifolius county distribution map". Biota of North America Program. 2014. Archived from the original on 10 May 2015. Retrieved 4 July 2015.
  4. Martin WC Jr (1958). The Taxonomy of Helianthus angustifolius and Related Species (PhD thesis). Indiana University. ProQuest   301906123 . Retrieved 30 July 2024.
  5. Chapman DS, Auge RM (March 1994). "Physiological-Mechanisms of Drought Resistance in 4 Native Ornamental Perennials". Journal of the American Society for Horticultural Science. 119 (2): 299–306. doi:10.21273/JASHS.119.2.299. Archived from the original on 20 May 2024. Retrieved 30 July 2024.
  6. "Helianthus angustifolius Linnaeus, 1753". Flora of North America. Archived from the original on 30 April 2015. Retrieved 4 July 2015.