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

Juncus vaseyi Engelm.
Vasey's rush
Juncaceae (Rush family)

Introduction to Vascular Plants

© Adolf Ceska  Email the photographer   (Photo ID #5711)

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Distribution of Juncus vaseyi
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Species Information

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Perennial, tufted herb from fibrous roots; stems erect, 20-70 cm tall.
Located on the lower part of the stem, nearly circular in cross-section, tapered, or grooved on the upper sides; sheaths with short, rounded ear-shaped lobes.
Inflorescence a terminal cluster of 10 to 50 flowers, appearing as if it is on the side of the stem; perianth segments greenish, 3.5-5 mm long, pointed, about equal; stamens 6; anthers about 0.8 mm long, about as long as the filaments; involucral bract grooved along the upper side, overtopping the inflorescence, resembling a continuation of the stem.
Capsules, cylindrical, blunt or notched at the tops, longer than the perianth segments, dark; seeds spindle-shaped, about 0.8-1.2 mm long, with tail-like appendages at each end.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Dry to moist shorelines and meadows in the steppe and montane zones; infrequent in BC E of the Coast Cascade Mountains; E to NF and S to ME, VT, IN, IL, IA and CO.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Juncus vaseyi

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) 1280 1545 1810
Slope Gradient (%) 0 11 22
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
40 40 40
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
6 6 7
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: ESSF(1)


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

Juncus greenei var. vaseyi (Engelm.) B. Boivin

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References