General:
Perennial, loosely tufted herb from fibrous roots; stems threadlike, usually submerged, 40-75 cm long, rooting at the nodes and often viviparous (producing plantlets in the inflorescence).

Leaves:
Located on the lower part of the stem, threadlike, the early leaves flaccid, usually submerged, with prominent cross-walls; sheaths open, with prominent, rounded, ear-shaped lobes.

Flowers:
Inflorescence terminal, 3-10 cm long, the heads with 2 or more flowers; perianth segments greenish-brown, 2.5-3 mm long, blunt or the outer ones pointed, the inner about the same length as the outer; stamens 6; anthers shorter than the filaments.

Fruits:
Capsules, blunt or notched, less than 1 mm longer than the perianth, brown; seeds about 0.5 mm long, egg-shaped, lacking tail-like appendages.

Source:  The 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.

Illustration Source:  The Illustrated Flora of British Columbia

Synonyms and Alternate Names:
Juncus supinus Moench