FNPS Plant Database

Hypericum tenuifolium

Atlantic St. John's-wort
  • Photo by: Shirley Denton, Suncoast Chapter FNPS
  • Photo by: Shirley Denton, Suncoast Chapter FNPS
  • Photo by: John Bradford, Martin County Chapter FNPS
  • Photo by: John Bradford, Martin County Chapter FNPS
  • Photo by: Shirley Denton, Suncoast Chapter FNPS

Nomenclature

Common Name:

Atlantic St. John's-wort

Synonym(s):

Hypericum reductum

Genus species:

Hypericum tenuifolium

Family:

Clusiaceae

Plant Specifics

Form:

shrub

Size:

1-2 ft tall by 1-2 ft wide

Life Span:

Long-lived perennial

Flower Color:

yellow

Fruit Color:

brown

Phenology:

Evergreen. Blooms spring-fall (all year in the south).

Noted For:

Showy Flowers, Interesting Foliage

Landscaping

Recommended Uses:

Works well in a wildflower garden or as a low border plant.

Considerations:

Availability:

Native Nurseries

Propagation:

Seed.

Light:

Full Sun

Moisture Tolerance:

Always Flooded---------------------------------Extremely Dry

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Somewhat moist, no flooding -to- 1Stays wet

Salt Water Flooding Tolerance:

Unknown

Salt Spray/Salty Soil Tolerance:

Some tolerance to salty wind but not direct salt spray

Soil or Other Substrate:

Sand

Soil pH:

Suitable to Grow In:

USDA zones are based on the average annual extreme minimum winter temperature.



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Ecology

Wildlife:

Pollinators

Attracts pollinators, especially bees.  Documented bees include  Colletes sp. A, Hylaeus conflzcens, Augochlorella aurata, A. gratiosa, Azcgochloropsis anonyma, A. metallica, A. sumnptuosa, Dialictus miniatulus, D. nymnphalis, D. placidensis, D. tegularis, Arzthidielluln perplexzcm, Megachile brevis pseudobreuis, M. georgica and Apis lnellifera (Deyrup et al. 2002).

Foliage and seeds are food source for birds and mammals.

Native Habitats:

Sandhill, pine flatwoods, dry edges of sandhill lakes..

Natural Range in Florida:

Comments:

Ethnobotany:

General Comments:

Citations:

Deyrup et al. 2002.



Huegel, Craig, N.  2012.  Native wildflowers and other ground covers for Florida landscapes. University Press of Florida, Gainesville, FL.



https://plants.ces.ncsu.edu/plants/hypericum-tenuifolium/ (salt) https://www.regionalconservation.org/beta/nfyn/plantdetail.asp?tx=Hyperedu (salt) https://fnpsblog.blogspot.com/2016/06/the-saints-of-hillsborough-county-genus.html



Osorio, Rufino. 2001. A gardener's guide to Florida's native Plants.  University Press of Florida, Gainesville, FL.



Wunderlin, R. P., B. F. Hansen, A. R. Franck, and F. B. Essig. 2021. Atlas of Florida Plants (http://florida.plantatlas.usf.edu/).  Institute for Systematic Botany, University of South Florida, Tampa.

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