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Plant Database

Search for native plants by scientific name, common name or family. If you are not sure what you are looking for, try the Combination Search or our Recommended Species lists.

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Triadenum walteri

Triadenum walteri (J.G. Gmel.) Gleason

Greater Marsh St. Johnswort

Clusiaceae (Mangosteen Family)

Synonym(s): Hypericum petiolatum, Hypericum tubulosum var. walteri, Hypericum walteri, Triadenum petiolatum, Triadenum tubulosum var. walteri


USDA Native Status: L48 (N)


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Plant Characteristics

Duration: Perennial
Habit: Herb
Fruit Type: Capsule
Size Notes: Up to about 3 feet tall.

Bloom Information

Bloom Color: Pink , Green
Bloom Time: Jul , Aug , Sep , Oct
Bloom Notes: Pink, sometimes tinged green.


USA: AL , AR , DE , FL , GA , IL , IN , KY , LA , MD , MO , MS , NC , NJ , OH , OK , SC , TN , TX , VA , WV

National Wetland Indicator Status

This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

Web Reference

Webref 57 - Atlas of Florida Plants (2020) Institute for Systematic Botany
Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Triadenum walteri in USDA Plants
FNA: Find Triadenum walteri in the Flora of North America (if available)
Google: Search Google for Triadenum walteri


Record Modified: 2022-12-21
Research By: DEW

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