Hypericaceae
Northern St. Johnswort
Hypericum boreale
- Family
- Hypericaceae
- Genus
- Hypericum
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Common names
By language (1)
- English
- Northern St. Johnswort
Synonyms
- Hypericum boreale f. boreale
- Hypericum boreale f. callitrichoides Fassett
- Hypericum canadense var. boreale Britton
- Hypericum mutilum subsp. boreale (Britton) J.M.Gillett
- Hypericum mutilum var. boreale (Britton) E.P.Bicknell
- Sarothra borealis (Britton) Y.Kimura
Flowers
- In flower
- July to September (from 37 flowering iNaturalist observations worldwide)
- Flower colour
- yellow (USDA PLANTS Database)
Characteristics
- Growth habit
- Forb/herb
- Lifespan
- Perennial
- In the US and Canada
- Canada: native, Lower 48 states: native, St. Pierre and Miquelon: native
Photos
FlowerPhoto: Tom Scavo, CC BY 4.0, from iNaturalist 
FlowerPhoto: bobkennedy, CC BY-SA 4.0, from iNaturalist 
FlowerPhoto: Cassidy Best, CC BY 4.0, from iNaturalist 
FlowerPhoto: Anne Parker, CC BY 4.0, from iNaturalist 
Photo: Étienne Lacroix-Carignan, CC0, from iNaturalist 
Photo: Ayotte, Gilles, 1948-, CC BY-SA 4.0, from Wikimedia Commons 
Photo: Ayotte, Gilles, 1948-, CC BY-SA 4.0, from Wikimedia Commons 
Photo: Ryan Sorrells, CC BY 4.0, from iNaturalist 
Photo: Ayotte, Gilles, 1948-, CC BY-SA 4.0, from Wikimedia Commons 
Photo: alicia penney, CC BY 4.0, from iNaturalist 
Photo: Charlie Pavlisich, CC BY 4.0, from iNaturalist 
Photo: Norma Malinowski, 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); common names, US characteristics from USDA PLANTS Database (2025-05-29, CC0 1.0). About our plant data.