Triglochin maritima |
Triglochin palustris |
|
---|---|---|
arrow-grass, common arrow-grass, saltmarsh arrow-grass, seaside arrow-grass, troscart maritime |
marsh arrow-grass, marsh arrrow-grass, troscart des marais |
|
Habit | Plants with fibrous strands of old leaves at base, 3.5–61.5 cm. | Plants with fibrous strands of leaves at base, 9–42.5 cm. |
Leaves | erect from sheath, mostly shorter than scape, 2.2–11.5 cm; sheath 0.7–2.5 cm × 1–1.8 mm, ligule occasionally hoodlike, apically 2-lobed; blade 0.9–1.4 mm wide, apex obtuse to round. |
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. |
Inflorescences | scape often purple near base, mostly exceeding leaves, 1–16.5 cm × 0.5–1 mm; racemes 6–45 cm × 1.5–7 mm; pedicel 1–4 × 0.2–0.3 mm. |
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. |
Flowers | tepals elliptic, 1.3–1.7 × 0.6–1.4 mm, apex acute; pistils 6, all fertile. |
tepals elliptic, 1.1–1.6 × 0.7–0.9 mm, apex round; pistils 6, 3 fertile, 3 sterile. |
Fruits | fruiting receptacle without wings; schizocarps linear to near globose, 2–4.5 × 1.5–2 mm; mericarps linear to linear-obovate, weakly ridged, 1.5–3.5 × 0.7–1 mm, beak erect to recurved, 0.2 mm. |
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. |
2n | = 12, 24, 36, 48, 120. |
= 24. |
Triglochin maritima |
Triglochin palustris |
|
Phenology | Flowering summer–fall. | Flowering summer and early fall. |
Habitat | Coastal and mountain marsh areas and moist alkaline meadows | Coastal and mountain marsh areas and moist alkaline meadows |
Elevation | 0–4000 m (0–13100 ft) | 0–3700 m (0–12100 ft) |
Distribution |
AK; AZ; CA; CO; CT; IA; ID; IL; IN; KS; MA; ME; MI; MN; MT; ND; NE; NH; NJ; NM; NV; NY; OH; OK; OR; PA; RI; SD; UT; VT; WA; WI; WY; AB; BC; MB; NB; NL; NS; NT; NU; ON; PE; QC; SK; YT; Mexico; South America; n Europe; n Asia
|
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
|
Discussion | This taxon has been separated into Triglochin concinna and T. maritima based upon the lobing of the ligule and the smaller size of the plants of the former (e.g., J. L. Reveal 1977; R. F. Thorne 1993). On a local basis such a separation seems warranted. Examination of the T. maritima complex throughout the Americas, however, reveals continuous variation from small, widely spaced plants with 2-lobed ligules to large, tufted plants with unlobed ligules, including plants with all combinations of those characters. Triglochin maritima is important in livestock management because it is quite toxic: it is a cyanide producer. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 22. | FNA vol. 22. |
Parent taxa | Juncaginaceae > Triglochin | Juncaginaceae > Triglochin |
Sibling taxa | ||
Synonyms | T. concinna, T. concinna var. debilis, T. debilis, T. elata | |
Name authority | Linnaeus: Sp. Pl. 1: 339. 1753 (as maritimum) | Linnaeus: Sp. Pl. 1: 338. 1753 (as palustre) |
Web links |
|
|