Triglochin palustris L.
marsh arrrow-grass
Juncaginaceae (Arrow-grass family)

Introduction to Vascular Plants


© Bryan Kelly-McArthur     (Photo ID #81248)


E-Flora BC Static Map

Distribution of Triglochin palustris
Click here to view the full interactive map and legend

Species Information

Aquatic perennial herb from a rhizome; stems 15-60 cm tall.
All basal, tufted, linear, 10-30 (40) cm long, 0.5-2 mm wide, flat; ligules usually 2-lobed, 0.5-1.5 mm long.
Inflorescence elongated and leafless, usually longer than the leaves with many, short-stalked flowers; perianth parts usually 6, 1.5-2 mm long; stamens usually 6; fertile ovaries 3.
Dry, linear to slenderly club-shaped, 6-7 (9) mm long, splitting into 3 carpels at maturity; seeds 1 per carpel, more or less angled.

SourceThe Illustrated Flora of British Columbia


If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.


Ecological Framework for Triglochin palustris

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class




Elevation (metres)
863 0 1581
Slope Gradient (%)
1 0 25

Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]

241 30 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
6 3 8
Modal Nutrient Regime
# of field plots
 species was recorded in:
Modal BEC Zone Class

All BEC Zones (# of stations/zone) species was recorded in

BWBS(13), CWH(2), ICH(4), IDF(10), MS(1), SBPS(3), SBS(9), SWB(2)

Habitat and Range

Tidal marshes, saline and alkaline ponds, wet meadows and fens in the lowland, steppe and montane zones; common in BC east of the Coast-Cascade Mountains and S of 55degreeN, less frequent northward and along the coast; cosmopolitan, N to AK, YT and NT, E to NF and S to ME, NY, OH, IA, NE, NM, UT, NV and CA; Greenland, Eurasia, S America.

SourceThe Illustrated Flora of British Columbia


Synonyms and Alternate Names:
Triglochin palustre L. [orthographic variant]