Triadenum virginicum (L.) Raf.
Virginia marsh St. Johnswort
Clusiaceae (St. John's-Wort Family)
Synonym(s): Hypericum virginicum
USDA Symbol: TRVI2
This wetland perennial differs in flower color from most of the St.-Johns-worts, which are yellow. It and other St.-Johns-worts with similar stamen arrangements are placed by some in the genus Triadenum. The name derives from tri (three) and aden (gland) and refers to the three central glands. The related Lesser Marsh St.-Johns-wort (T. tubulosum), found only as far north as southeast Virginia, southern Indiana, and Missouri, has the base of the leaves rounded or tapered, not heart-shaped.
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Bloom InformationBloom Time: Jul , Aug
DistributionUSA: AL , CT , DC , DE , FL , GA , IL , IN , LA , MA , MD , ME , MI , MS , NC , NH , NJ , NY , OH , OK , PA , RI , SC , TN , TX , VA , VT , WI , WV
Canada: NS , PE
Native Distribution: Coastal, from Nova Scotia to s. New England and New York; south to Florida; local in Ohio, Indiana, and Illinois, along Great Lakes.
Native Habitat: Wet sandy areas, swamps, and bogs.
National Wetland Indicator Status
Additional resourcesUSDA: Find Triadenum virginicum in USDA Plants
FNA: Find Triadenum virginicum in the Flora of North America (if available)
Google: Search Google for Triadenum virginicum
MetadataRecord Modified: 2013-07-11
Research By: TWC Staff