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marsh arrow-grass, marsh arrrow-grass, troscart des marais

Habit Plants with fibrous strands of leaves at base, 9–42.5 cm.

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.


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.


tepals elliptic, 1.1–1.6 × 0.7–0.9 mm, apex round;

pistils 6, 3 fertile, 3 sterile.


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.


= 24.

Triglochin palustris

Phenology Flowering summer and early fall.
Habitat Coastal and mountain marsh areas and moist alkaline meadows
Elevation 0–3700 m (0–12100 ft)
from FNA
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
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 22.
Parent taxa Juncaginaceae > Triglochin
Sibling taxa
T. gaspensis, T. maritima, T. striata
Name authority Linnaeus: Sp. Pl. 1: 338. 1753 (as palustre)
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