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 native to wet woods, bogs, and ditches of the eastern United States and Guatemala.

[1][4] It has been introduced to Poland.

[4] It was first formally described in 1845.

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