Hypericum fraseri
species of plant

Triadenum fraseri, commonly known as bog St. John's wort, Fraser's St. John's wort, and Fraser's marsh St. John's wort, is a perennial flowering plant in the family Hypericaceae that grows in wetlands of Canada and the northern United States. It is named after John Fraser (1750–1811), a Scottish botanist and widely travelled plant collector.
Description
Triadenum fraseri is a perennial forb that can grow to heights of 1 ft (0.30 m) to 2 ft (0.61 m). The plant has blue-green, sometimes purple-tinged, stalkless, elliptical, opposite leaves that are typically 2.5 in (6.4 cm) long and to 1.75 in (4.4 cm) wide, with prominent, often red stems and veins.
The plant displays clusters of a few to several flowers arising from leaf axils, at the end of branching stems. The pink five-petal flowers with green or purplish sepals that range from 0.25 in (0.64 cm) to 0.75 in (1.9 cm) wide when fully open (but they are rarely open). The flower typically appears closed like a bud.
“Hypericum fraseri” enters the record as species of plant. Crown Archives preserves that source wording while asking what Hypericum, fraseri and species can confirm, complicate or overturn.
Why this record matters
“Hypericum fraseri” is worth following because a concise public description often conceals a longer documentary argument. Here, Hypericum, fraseri and species provides the most credible route into that argument.
The date and method of observation matter as much as the stated conclusion, especially where classification or consensus has changed. The source revision retrieved here is dated Aug 14, 2026. The linked authority identifier is Q49602808. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1750 and 1811.
Current terminology should not be projected backward without checking the classification used when the underlying evidence was created. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Check terminology, classification and the date of the cited evidence. Scientific names and technical consensus can change while older records retain historical value.
- Current terminology
- Classification context
- Finding cited technical literature
Primary datasets, specimen catalogues, standards bodies and the most recent peer-reviewed literature.
Three-step research path
- Establish the record: confirm the title “Hypericum fraseri”, its source revision and the description used here.
- Expand the search: follow Hypericum fraseri primary sources, Hypericum fraseri archive and Hypericum research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Hypericum fraseri”?
- Has classification or technical consensus changed since the cited source?
- Which observation, specimen, dataset or publication supports the account?
Search terms from this dossier
This entry incorporates text from “Hypericum fraseri” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.