Hypericum sphaerocarpum, the roundseed St. Johnswort or barrens St. John's Wort, is a species of flowering plant in the St. John's Wort family. It is native to the Eastern United States where it is primarily found in the Midwest and Mid-South. Its preferred habitat is dry, calcareous glades and prairies. It is a semi-woody perennial that produces clusters of yellow flowers in the summer.Hypericum sphaerocarpum is often confused with Hypericum dolabriforme where their ranges overlap. H.
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