Atlantic St. John's Wort, Hypericum tenuifolium Synonym: Hypericum reductum
side image of gopher tortoise opening its mouth. Figure 4 from  Wildlife of Florida Factsheet: Gopher Tortoise: WEC396/UW441, 8/2018
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Dune Restoration Plants
Clusiaceae (taxonomic family)

How to Cite

Miller, Debbie, Mack Thetford, Chris Verlinde, and Gabriel Campbell. 2018. “Atlantic St. John’s Wort, Hypericum Tenuifolium Synonym: Hypericum Reductum: SGEB-75-9/SG170, 9/2018”. EDIS 2018 (5). Gainesville, FL.


Atlantic St. John’s wort occurs throughout Florida and more broadly west to Alabama and northeast to North Carolina on beach dunes and scrub plant communities frequently associated with wet depression areas. Hypericum is a large genus of plants with 31 species in Florida alone (Wunderlin et al. 2017). This plant is a prolific flower producer that attracts numerous pollinators.

This publication is derived from information in SGEB-75/SG156, Dune Restoration and Enhancement for the Florida Panhandle, by Debbie Miller, Mack Thetford, Christina Verlinde, Gabriel Campbell, and Ashlynn Smith.
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Campbell, M.H. 1985. "Germination, emergence and seedling growth of Hypericum perforatum L." Weed Research 25(4):259-266.

Çırak C., K. Kevseroğlu, and A.K. Ayan. 2007. "Break seed dormancy in a Turkish endemic Hypericum species: Hypericum aviculariifolium subsp. depilatum var. depilatum by light and some pre-soaking treatments." Journal of Arid Environments 68(1):159-164.

Çırak, C. 2007. "Seed germination protocols for Ex situ conservation of some Hypericum species from Turkey." American Journal of Plant Physiology 2(5):287-294.

Pérez-García, F., M. Huertas, E. Mora, B. Peña, F. Varela, and M.E. González-Benito. 2006. "Hypericum perforatum L. seed germination: interpopulation variation and effect of light, temperature, presowing treatments and seed desiccation." Genetic Resources and Crop Evolution 53:1187-1198.

Thetford, M., and D.L. Miller. 2002. "Propagation of 4 Florida coastal dune species." Native Plants Journal 3(2):112-120.

Thetford, M., and D.L. Miller. 2004. Propagation and Production of Atlantic St. John's Wort. ENH972. Gainesville: University of Florida Institute of Food and Agricultural Sciences.

Wunderlin, R.P., B.F. Hansen, A.R. Franck, and F.B. Essig. 2017. Atlas of Florida Plants. [S. M. Landry and K. N. Campbell (application development), USF Water Institute.] Institute for Systematic Botany, University of South Florida, Tampa.

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