Triglochin maritima L.
seaside arrow-grass (seaside arrowgrass)
Juncaginaceae (Arrow-grass family)

Introduction to Vascular Plants


© Brian Klinkenberg     (Photo ID #20126)


E-Flora BC Static Map

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

Species Information

Aquatic or semi-aquatic perennial herb from a rhizome; stems (10) 30-100 (120) cm tall.
All basal, tufted, linear, 20-70 cm long, 1.5-2.5 (4) mm wide, flat; ligules entire or nearly so, 1-5 mm long.
Inflorescence elongated and leafless, usually longer than the leaves with many, short-stalked flowers; perianth parts usually 6, about 2 mm long; stamens usually 6; fertile ovaries 6.
Dry, oblong to egg-shaped, 3-5 (7) mm long, splitting into 6 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 maritima

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)
697 0 1581
Slope Gradient (%)
0 0 28

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

13 35 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
6 1 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

BG(6), BWBS(19), CDF(15), CWH(35), ESSF(1), ICH(12), IDF(47), MS(9), PP(2), SBPS(29), SBS(42), SWB(1)

Habitat and Range

Tidal marshes, saline and alkaline ponds, fens and wet meadows in the lowland, steppe and montane zones; frequent throughout BC south of 55degreeN, less frequent northward; cosmopolitan, N to AK, YT and NT, E to NF and S to NH, PA, OH, IL, OK, NM, AZ, CA and MX; Eurasia, N Africa, S America.

SourceThe Illustrated Flora of British Columbia


Synonyms and Alternate Names:
Triglochin elata Nutt.
Triglochin elatum Nutt. [orthographic variant]
Triglochin elatum
Triglochin maritima var. elata (Nutt.) A. Gray
Triglochin maritimum L. [orthographic variant]
Triglochin maritimum
Triglochin maritimum var. elatum (Nutt.) A. Gray, orth. var.