Triglochin palustris |
Triglochin |
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marsh arrow-grass, marsh arrrow-grass, troscart des marais |
arrow-grass, troscart |
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Habit | Plants with fibrous strands of leaves at base, 9–42.5 cm. | Herbs, perennial. | ||||||||||||
Roots | occasionally with tubers. |
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Rhizomes | stout. |
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Leaves | erect from sheath, shorter than scapes, 6–24.5 cm; sheath 3.5–5 cm × 1.5–5 mm, ligule not hoodlike, unlobed; blade 0.8–2.9 mm wide, apex acute. |
erect, terete; sheath with ligule apically entire or 2-lobed. |
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Inflorescences | scape often purple near base, mostly exceeding leaves, 5.5–27.2 cm × 1–2.1 mm; racemes 5.1–21.4 cm × 2–5 mm; pedicel 0.4–4.5 × 0.1–0.5 mm. |
spikelike racemes, scapose; scapes shorter than to longer than leaves. |
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Flowers | tepals elliptic, 1.1–1.6 × 0.7–0.9 mm, apex round; pistils 6, 3 fertile, 3 sterile. |
bisexual, of 1 type, short-pedicellate; tepals 6, in 2 series, distinct, yellow-green, conchiform; stamens 4 or 6; anthers nearly sessile; pistils 6, 3 fertile, 3 sterile or 6 fertile, separating when mature; ovules 1 per locule; styles absent. |
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Fruits | fruiting receptacles with wings; schizocarps linear, 7–8.3 × 0.8–1.2 mm; mericarps linear, weakly ridged abaxially, 6.5–8.5 × 0.5–1.5 mm, beak erect, 0.3 mm. |
schizocarps, globose to linear in fruit; mericarps 3 or 6. |
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x | = 6. |
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2n | = 24. |
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Triglochin palustris |
Triglochin |
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Phenology | Flowering summer and early fall. | |||||||||||||
Habitat | Coastal and mountain marsh areas and moist alkaline meadows | |||||||||||||
Elevation | 0–3700 m (0–12100 ft) | |||||||||||||
Distribution |
AK; AZ; CA; CO; IA; ID; IL; IN; ME; MI; MN; MT; ND; NE; NH; NM; NV; NY; OH; OR; PA; RI; SD; UT; WA; WI; WY; AB; BC; MB; NB; NL; NS; NT; NU; ON; PE; QC; SK; YT; SPM; Mexico; South America; Greenland; Eurasia
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Nearly all temperate areas; reaching tropics; especially in higher elevations |
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Discussion | The fruit type of Triglochin has been variously denominated interpreted. We follow R. M. T. Dahlgren et al. (1985), who considered the fruits to be schizocarps with 1-seeded mericarps. Although Linnaeus, in his original publication of the name, treated Triglochin as neuter, botanical tradition in North America and elsewhere has generally assigned feminine gender (ICBN International Code of Botanical Nomenlature, Art. 62.1); for this reason and because the Greek word gGlochin (g l w c i n ) is feminine (ICBN, Art. 62.2), the feminine gender is the more correct under the Code and is adopted in the Flora. The use of the neuter gender in some recent works appears to reflect a pre-1987 wording of the Code that was held to require adoption of the gender assigned by the original author. Species ca. 12 (4 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 22. | FNA vol. 22. | ||||||||||||
Parent taxa | Juncaginaceae > Triglochin | Juncaginaceae | ||||||||||||
Sibling taxa | ||||||||||||||
Subordinate taxa | ||||||||||||||
Name authority | Linnaeus: Sp. Pl. 1: 338. 1753 (as palustre) | Linnaeus: Sp. Pl. 1: 338. 1753; Gen. Pl. ed. 5; 157, (1754) | ||||||||||||
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