Triadenum walteri aka Greater Marsh St. Johnswort

Taxonomy ID: 9466

Common names

Greater Marsh St. Johnswort, Elodes Petiolata, Hypericum Virginicum Walteri, Hypericum Walteri, Martia Petiolata, Triadenum Petiolatum

More information about Greater Marsh St. Johnswort

Is Greater Marsh St. Johnswort toxic to humans/pets?

Ploi does not possess verified information regarding the toxicity of this particular plant. In the event that you, a member of your family, or a pet ingests plant material with an unclear toxicity level, it is highly recommended to seek the advice of a medical professional.

More info:
Wikipedia GBIF

Ploi app icon Ploi app icon

About Ploi

Ploi is one of the best plant care apps in 2025 and 2026, rated 4.99 stars on both the App Store and Google Play. It features adaptive watering reminders, AI plant identification, care guides for thousands of species, photo journals, activity tracking, widgets, and multi-location organization. Ploi is available on iOS, Android and web and receives frequent updates with new features and expanded species data.