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

Juncus compressus Jacq.
compressed rush (roundfruit rush)
Juncaceae (Rush family)

Introduction to Vascular Plants
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Distribution of Juncus compressus
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Species Information

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General:
Perennial, loosely tufted herb from short to elongate rhizomes; stems erect, 10-45 cm long, bluish-green.
Leaves:
Located on the lower parts of the stem, flat, lacking cross-walls.
Flowers:
Inflorescence terminal, 3-15 cm long, the branches spreading; perianth segments dark brown with greenish midribs and whitish margins, 2-3 mm long, rounded, the outer blunt with incurved or hooded tips, the inner about the same length as the outer; stamens 6; anthers 0.5-1 mm long, subequal to or 1-2 times longer than the filaments; lowermost bract as long as or longer than the inflorescence, the flowers each with 2 involucral bractlets.
Fruits:
Capsules, globe- to egg-shaped, rounded, distinctly longer than the perianth segments; seeds egg-shaped, 0.4-0.5 mm long, lacking tail-like appendages.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Wet depressions and lakeshores in the lowland and steppe zones; rare in SW and SC BC; introduced from Europe.

Source: The Illustrated Flora of British Columbia

Climate

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.

Taxonomic and Nomenclatural Links

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General References