Hypericum gymnanthum

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Common Names: claspingleaf St. Johnswort [1]

Hypericum gymnanthum
Hypericum gymnanthum IWF.jpg
Photo from Illinois Wildflowers Plant Database
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicots
Order: Theales
Family: Clusiaceae
Genus: Hypericum
Species: H. gymnanthum
Binomial name
Hypericum gymnanthum
Natural range of Hypericum gymnanthum from USDA NRCS Plants Database.

Taxonomic Notes




H. gymnanthum is a perennial forb/herb of the Clusiaceae family that is native to North America. [1]


H. gymnanthum is found throughout the eastern United States is a number of states; Florida, Georgia, South Carolina, North Carolina, Alabama, Mississippi, Louisiana, Texas, Arkansas, Tennessee, Virginia, Missouri, Kansas, Illinois, Indiana, Ohio, West Virginia, Pennsylvania, Maryland, New Jersey, and New York. [1]



Common habitats include pine savannas, wet pine flatwoods, sinkhole ponds, and other wet habitats that are in the Atlantic and Gulf Coastal Plain, Eastern Mountains, great Plains, Midwest, North central and Northeast. [2] [1]

Specimens have been collected from habitats including edge of small pond in longleaf pine woodland, wet roadside depression, moist loamy sands, edge of wet savanna, and pine canopy forests. [3]


H. gymnanthum has been observed flowering in May, July, and August. [4]

Conservation and Management

H. gymnanthum is considered endangered in Maryland and Ohio. It is being extirpated ini Pennsylvania. [1]

Cultivation and restoration

Photo Gallery

References and notes

  1. 1.0 1.1 1.2 1.3 1.4 USDA Plant Database
  2. Weakley, A. S. (2015). Flora of the Southern and Mid-Atlantic States. Chapel Hill, NC, University of North Carolina Herbarium.
  3. URL: http://herbarium.bio.fsu.edu. Last accessed: June 2018. Collectors: L.C. Anderson, R.K. Godfrey, B.Boothe, M. Boothe, V. Craig, William Platt. States and counties: Florida (Jackson, Franklin, Wakulla, Gadsden, Liberty, Jefferson) Georgia (Thomas)
  4. Nelson, G. PanFlora: Plant data for the eastern United States with emphasis on the Southeastern Coastal Plains, Florida, and the Florida Panhandle. www.gilnelson.com/PanFlora/ Accessed: 22 MAY 2018