Helianthus silphioides

Helianthus silphioides
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Asterales
Family: Asteraceae
Genus: Helianthus
Species: H. silphioides
Binomial name
Helianthus silphioides
Nutt. 1841
Synonyms[1]
  • Helianthus atrorubens var. pubescens Kuntze
  • Helianthus kentuckiensis McFarland & W.A.Anderson

Helianthus silphioides is a North American species of sunflower known by the common name Rosinweed sunflower. It is native to the central United States, primarily in the Ozarks and the Tennessee Valley with additional populations north into Kentucky and Illinois and south as far as Louisiana and Alabama. [2]

Helianthus silphioides grows in open locations. It is an perennial herb up to 300 cm (10 feet) tall. Leaves are broadly egg-shaped. One plant usually produces 3-15 flower heads, each containing 8–13 yellow ray florets surrounding 75 or more red disc florets.[3]

References

  1. ↑ The Plant List, Helianthus silphioides Nutt.
  2. ↑ Biota of North America Program 2014 county distribution map
  3. ↑ Flora of North America, Helianthus silphioides Nuttall, 1841. Rosinweed sunflower

External links


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