Triadenum fraseri |
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bog St. John's wort, Fraser's marsh-St. John's-wort, Fraser's St. John's-wort, marsh St. John's-wort, millepertuis de Fraser |
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Habit | Herbs erect, 1.5–7.5 dm, sometimes with ascending branches in distal 1/2+. |
Stems | shallowly 4-lined at first, then terete. |
Leaves | sessile, sometimes amplexicaul; blade broadly ovate or triangular-ovate to oblong, 15–50(–70) × 10–40(–50) mm, base usually ± shallowly cordate, rarely truncate, apex rounded to retuse, gland dots laminar (relatively dense) and intramarginal. |
Triadenum fraseri |
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Phenology | Flowering late summer–early fall (Jul–Sep). |
Habitat | Wooded swamps, fens, marshes, lakeshores, organic to silty and sandy substrates, along shores, beaver meadows, poor fens (rarely in true bogs) |
Elevation | 0–500 m (0–1600 ft) |
Distribution |
CT; DE; IA; IL; IN; MA; MD; ME; MI; MN; MT; NC; NE; NH; NJ; NY; OH; PA; RI; TN; VA; VT; WI; WV; BC; MB; NB; NL; NS; ON; PE; QC; SK; SPM
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Discussion | According to B. Boivin (1967), Triadenum fraseri (as Hypericum virginicum) was introduced into British Columbia from eastern Canada in peat. It seems to be almost always distinguishable from T. virginicum and to have a distinct habitat; it merits specific rank. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 6, p. 103. |
Parent taxa | Hypericaceae > Triadenum |
Sibling taxa | |
Synonyms | Elodes fraseri, Hypericum virginicum var. fraseri, T. virginicum subsp. fraseri, T. virginicum var. fraseri |
Name authority | (Spach) Gleason: Phytologia 2: 289. (1947) |
Web links |
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