Difference between revisions of "Triadenum virginicum"
Fl. Tellur. 3: 79. 1837.
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|basionyms={{Treatment/ID/Basionym | |basionyms={{Treatment/ID/Basionym | ||
|name=Hypericum virginicum | |name=Hypericum virginicum | ||
|authority=Linnaeus | |authority=Linnaeus | ||
| + | |rank=species | ||
|publication_title=Syst. Nat. ed. | |publication_title=Syst. Nat. ed. | ||
|publication_place=10, 2: 1184. 1759 | |publication_place=10, 2: 1184. 1759 | ||
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|name=Elodes campanulata | |name=Elodes campanulata | ||
|authority=(Walter) Pursh | |authority=(Walter) Pursh | ||
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}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=E. campanulata var. emarginata | |name=E. campanulata var. emarginata | ||
|authority=(Lamarck) Pursh | |authority=(Lamarck) Pursh | ||
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}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=E. virginica | |name=E. virginica | ||
|authority=(Linnaeus) Farwell | |authority=(Linnaeus) Farwell | ||
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}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Gardenia virginica | |name=Gardenia virginica | ||
|authority=Walter | |authority=Walter | ||
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}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Hypericum campanulatum | |name=Hypericum campanulatum | ||
|authority=Stokes | |authority=Stokes | ||
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}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=H. enneandrum | |name=H. enneandrum | ||
|authority=(Walter) Sprengel | |authority=(Walter) Sprengel | ||
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}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Martia campanulata | |name=Martia campanulata | ||
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|hierarchy=Hypericaceae;Triadenum;Triadenum virginicum | |hierarchy=Hypericaceae;Triadenum;Triadenum virginicum | ||
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name=Triadenum virginicum | name=Triadenum virginicum | ||
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|authority=(Linnaeus) Rafinesque | |authority=(Linnaeus) Rafinesque | ||
|rank=species | |rank=species | ||
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|publication title=Fl. Tellur. | |publication title=Fl. Tellur. | ||
|publication year=1837 | |publication year=1837 | ||
| − | |special status=Endemic; | + | |special status=Endemic;Illustrated |
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V6/V6_182.xml |
|genus=Triadenum | |genus=Triadenum | ||
|species=Triadenum virginicum | |species=Triadenum virginicum | ||
Latest revision as of 22:19, 5 November 2020
Herbs erect, 2–7 dm, sometimes with ascending branches distally. Stems: internodes 4-lined or 4-angled at first, then terete. Leaves sessile, sometimes amplexicaul; blade usually ovate or triangular-ovate to elliptic or oblong, rarely oblanceolate, 20–65 × 10–22(–30) mm, base shallowly cordate, apex usually rounded, rarely obtuse to retuse, gland dots laminar (relatively dense, large) and intramarginal (relatively small). Inflorescences laxly cylindric to pyramidal, 3–15-flowered from terminal node, sometimes with subsidiary inflorescences from to 4 proximal nodes and flowering branches from to 6 further nodes. Flowers 10–15 mm diam.; sepals oblong to elliptic-oblong or oblong-lanceolate, 4–7(–8) × 1–2 mm, apex acute to acuminate; petals oblong-elliptic to oblanceolate, 6–9(–10) mm; stamen fascicles 4–6.5 mm; filaments 1/5 connate; styles 2–3.5 mm. Capsules cylindric to ellipsoid or ovoid-ellipsoid, (8–)9–10(–12) × 4–5 mm, apex acute. Seeds 0.5–1.2 mm. 2n = 38.
Phenology: Flowering summer–fall (Jul–Oct).
Habitat: Swamps, marshy shores, poor fens
Elevation: 0–500 m
Distribution
N.S., Ont., Ala., Ark., Conn., Del., D.C., Fla., Ga., Ill., Ind., Ky., La., Maine, Md., Mass., Mich., Miss., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., S.C., Tenn., Tex., Vt., Va., W.Va., Wis.
Discussion
Triadenum virginicum is the most widely distributed North American species of Triadenum. In the southwestern part of its range, the leaves are longer and narrower, approaching those of T. tubulosum and T. walteri; it is nearly always distinguishable from the northern T. fraseri by the sepals and styles (see key).
Selected References
None.