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Triadenum Rafinesque. Marsh St. John's-wort.

Key to Triadenum

A genus of about 10 species, perennial herbs, of e. North America and e. Asia. Sometimes merged into Hypericum, Triadenum is one of a few basal clades that seem better separated as separate at generic rank from Hypericum.

Ref: Robson (2015d) In Flora of North America Editorial Committee (2015). Show full citations.

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Hover over a shape, letter, icon, or arrow on the map for definition or see the legend. Data for arrows not developed for genera and families which may have species only occurring outside the flora area.

image of plant© Jacob Dakar | Triadenum virginicum | Original Image ⭷
image of plant© Gary P. Fleming | Triadenum fraseri | Original Image ⭷
image of plant© Richard & Teresa Ware | Triadenum virginicum CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Gary P. Fleming | Triadenum walteri | Original Image ⭷
image of plant© Richard & Teresa Ware | Triadenum virginicum CC-BY-NC, permission granted to NCBG | Original Image ⭷

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See something wrong or missing on about Triadenum? Let us know here: (Please include your name and email if at all complicated so we can clarify if needed.) We greatly appreciate feedback, and will include updates from you in our next webapp update, which can take a few months.