E-Flora BC: Electronic Atlas of the Flora of British Columbia

Triglochin concinna Burtt Davy
graceful arrow-grass (slender arrowgrass)
Juncaginaceae (Arrow-grass family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #10055)

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Distribution of Triglochin concinna
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Species Information

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Aquatic perennial herb from a rhizome; stems 5-20 cm tall.
All basal, tufted, linear, 5-20 cm long, 0.5-1.5 mm wide, more or less cylindric; ligules 2-lobed, 0.5-1 mm long.
Inflorescence elongated and leafless, usually shorter than the leaves with 5 to 20, short-stalked flowers; perianth parts usually 6, about 1.5 mm long; stamens usually 6; fertile ovaries 6.
Dry, oblong to egg-shaped, 4-5 mm long, splitting into 6 carpels at maturity; seeds 1 per carpel, more or less angled.
T. concinna is treated separately from T. maritima in this manual since they are distinct in our region. Some taxonomists, e.g., Flora of North America Editorial Committee (2000), have merged them since they are difficult to separate over much of their range.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Tidal marshes; rare in coastal BC; S to NW MX; S America.

Source: The Illustrated Flora of British Columbia


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Triglochin concinna var. concinna
Triglochin concinna var. debilis (M.E. Jones) J.T. Howell, orth. var.
Triglochin concinnum Burtt-Davy [orthographic variant]
Triglochin concinnum
Triglochin concinnum var. concinnum
Triglochin concinnum var. debile (M.E. Jones) J.T. Howell, orth. var.
Triglochin debile (M.E. Jones) A. Löve & D. Löve

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References