Hypericum gymnanthum

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Hypericum gymnanthum
Hypericum gymnanthum BB-1913.png
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Malpighiales
Family: Hypericaceae
Genus: Hypericum
Section: H. sect. Trigynobrathys
Subsection: H. subsect. Knifa
Species:
H. gymnanthum
Binomial name
Hypericum gymnanthum
Engelm. & Gray [1]
Synonyms [1]
  • Hypericum canadense var. cardiophyllumR.Keller
  • Hypericum mutilum var. gymnanthum(Engelm. & A.Gray) A.Gray
  • Sarothra gymnantha(Engelm. & A.Gray) Y.Kimura

Hypericum gymnanthum, the small-flowered St. John's wort [2] or clasping leaf St. John's wort, [3] is a species of flowering plant in the St. John's wort family Hypericaceae. It was first formally described in 1845. [4]

Contents

Description

H. gymnanthum ranges in height from 0.3 to 1 meters (approximately 1 to 3 feet) in height. Each yellow flower has five petals, each being 3 to 6 millimeters long. [5] [6] Its lower leaves are significantly smaller than its upper leaves, which are 1.5 centimeters long and 1 centimeter wide. [6]

Distribution and Habitat

This species' range encompasses the eastern United States, from Florida to New York, and it also occurs in Guatemala. [7] [8] It has been introduced to Poland. [7]

It is commonly found in wet habitats such as sinkhole ponds, wet pine flatwoods, bogs, swales, and pine savannas. [9] [10] The United States Department of Agriculture classifies H. gymnanthum as a facultative wetland species. [8]

References

  1. 1 2 "Hypericum gymnanthum Engelm. & Gray". Plants of the World Online. Royal Botanical Gardens Kew. Retrieved 20 December 2018.
  2. ↑ Robson, Norman K. B. (2015). "Hypericum gymnanthum". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 6. New York and Oxford: Oxford University Press. Retrieved 20 December 2018– via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
  3. ↑ "Hypericum gymnanthum Species Page". floraofalabama.org. APA: Alabama Plant Atlas. Retrieved 20 December 2018.
  4. ↑ "Hypericum gymnanthum Engelm. & Gray". ipni.org. International Plant Names Index. Retrieved 20 December 2018.
  5. ↑ "Lady Bird Johnson Wildflower Center - The University of Texas at Austin". www.wildflower.org. Retrieved 2025-08-01.
  6. 1 2 Godfrey, Robert K. (1981). Aquatic and Wetland Plants of Southeastern United States: Dicotyledons. Jean W. Wooten. Athens: University of Georgia Press. ISBN   978-0-8203-0532-5.
  7. 1 2 "Hypericum gymnanthum Descriptions". hypericum.myspecies.info. Retrieved 20 December 2018.
  8. 1 2 "USDA Plants Database". plants.usda.gov. Retrieved 2025-08-01.
  9. ↑ Weakley, A. S. (2015). Flora of the Southern and Mid-Atlantic States. Chapel Hill, NC, University of North Carolina Herbarium.
  10. ↑ "NatureServe Explorer 2.0". explorer.natureserve.org. Retrieved 2025-08-01.


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