Fraser’s Marsh St. Johnswort

Triadenum fraseri

Pollinator Value

❄️ Winter Food Source: Wood Duck (Aix sponsa) feeds on Triadenum seeds, which constitute approximately 0.66% of diet by weight or volume. Capsules persist into autumn and early winter, providing a minor but documented food source for dabbling waterfowl in wetland habitats.
S57

Proximity Score: 0
Native Status: ✅ Outaouais ✅ Ottawa ✅ QC ✅ ON
Closest Direction: Local
CEC Eco-Regions: 5 – Northern Forests, 5.2 – Mixed Wood Shield, 5.2.3 – Algonquin/Southern Laurentians
Rarity Notes: Secure (S5) in both Ontario and Quebec with a global rank of G5 and IUCN status of Least Concern. Not listed under SARA or COSEWIC. Widely distributed across northeastern North America from Manitoba to the Maritimes. Common in the Ottawa area according to Brunton (2005).
S22+S26+S62
Rarity Ranks: QC S5 – Secure, ON S5 – Secure
Migration: Stable
Ecological Context: An obligate wetland perennial of swamps, fens, marshes, and lakeshores across the Mixed Wood Shield and Great Lakes region. In the Outaouais, found along the Ottawa River and Gatineau River in minerotrophic fens, forested swamps, and marshy shorelines on organic to silty substrates. Specimens from Ile-Kettle, Perkins, Masham, Plaisance, and Ripon confirm a consistent association with poorly drained peatlands, alder thickets, and sedgy margins.
S6+S7+S48

❌ Not Edible

Foraging Notes: No edible uses documented in PFAF, Moerman's Native American Ethnobotany, or Duke's Phytochemical database.
S29+S28+S31