Hypericaceae
Greater marsh St. Johnswort
Hypericum walteri
- Family
- Hypericaceae
- Genus
- Hypericum
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Common names
By language (1)
- English
- Greater marsh St. Johnswort
Synonyms
- Elodea axillaris Spach
- Elodea floribunda Spach
- Elodea petiolata Pursh
- Elodea petiolata Leconte ex Spach
- Elodea tubulosa Pursh
- Elodes axillaris Spach
- Elodes floribunda Spach
- Elodes petiolata Raf.
- Elodes petiolata Pursh
- Elodes petiolata Leconte ex Spach
- Elodes tubulosa Raf.
- Elodes tubulosa Pursh
- Hypericum axillare Michx.
- Hypericum leconteanum Steud.
- Hypericum paludosum Choisy
- Hypericum petiolatum Walter
- Hypericum tubulosum var. walteri (J.F.Gmel.) Lott
- Hypericum virginicum subsp. walteri (J.F.Gmel.) A.E.Murray
- Hypericum virginicum var. walteri (J.F.Gmel.) A.E.Murray
- Martia petiolata Spreng.
- Triadenum petiolatum Britton
- Triadenum tubulosum var. walteri (J.F.Gmel.) Cooperr.
- Triadenum walteri (J.F.Gmel.) Gleason
Flowers
- In flower
- August to September (from 26 flowering iNaturalist observations worldwide)
Photos
FlowerPhoto: Annika Lindqvist, CC BY 4.0, from iNaturalist 
FlowerPhoto: Laura Clark, CC BY 4.0, from iNaturalist 
FlowerPhoto: Michelle W. （鍾偉瑋）, CC BY 4.0, from iNaturalist 
FlowerPhoto: Adam Wilson, CC BY 4.0, from iNaturalist 
FlowerPhoto: Michelle W. （鍾偉瑋）, CC BY 4.0, from iNaturalist 
FruitPhoto: mfeaver, CC BY 4.0, from iNaturalist 
FruitPhoto: Anne Parker, CC BY 4.0, from iNaturalist 
Photo: Wikimedia Commons contributor, CC BY 4.0, from Wikimedia Commons 
Photo: Wikimedia Commons contributor, CC BY 4.0, from Wikimedia Commons 
Photo: Wikimedia Commons contributor, CC BY 4.0, from Wikimedia Commons 
Photo: Samuel Buckner, CC BY 4.0, from iNaturalist 
Photo: Chelsea Smith, CC BY 4.0, from iNaturalist
More in Hypericum
- Common St. JohnswortHypericum perforatumHypericaceae
- Spotted St. JohnswortHypericum maculatumHypericaceae
- Sweet-amberHypericum androsaemumHypericaceae
- Hairy St John's-wortHypericum hirsutumHypericaceae
- Trailing St. JohnswortHypericum humifusumHypericaceae
- Mountain St. John's WortHypericum montanumHypericaceae
- PeterwortHypericum tetrapterumHypericaceae
- Aaron's beardHypericum calycinumHypericaceae
- Slender St John's-wortHypericum pulchrumHypericaceae
- Goat St John's wortHypericum hircinumHypericaceae
- Goldencup St. John's wortHypericum patulumHypericaceae
- Hypericum triquetrifoliumHypericaceae
Sources: classification, synonyms from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0). About our plant data.