Juncus filiformis L.
thread rush
Juncaceae (Rush family)

Introduction to Vascular Plants

Photograph

© Bryan Kelly-McArthur     (Photo ID #85503)

Map

E-Flora BC Static Map

Distribution of Juncus filiformis
Click here to view the full interactive map and legend

Species Information

General:
Perennial herb from elongated rhizomes; stems arising singly, not in dense clusters, round, usually straight, smooth, finely grooved, 15-40 cm tall.
Leaves:
Reduced to small sheaths at the base of the stem; sheaths dull, light brown.
Flowers:
Inflorescence a head-like cluster, with numerous flowers on branches 0.5-3 cm long, appearing as if on the side of the stem, located about halfway between the tip of the involucral bract and the base of the stem; perianth segments pale green or whitish, 3-4 mm long, pointed, subequal; stamens 6; anthers shorter than the filaments; involucral bract 7-20 cm long, cylindrical, resembling a continuation of the stem, subequal to longer than the stem.
Fruits:
Capsules, globe-shaped, slightly shorter than the perianth segments; seeds egg-shaped, 0.4-0.5 mm long.

Source:  The Illustrated Flora of British Columbia

Illustration

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.

Ecology

Ecological Framework for Juncus filiformis

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

Avg

Min

Max
Elevation (metres)
 1046 350 1870
Slope Gradient (%)
 1 0 10

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

 57 44 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric] 		6 5 8
Modal Nutrient Regime
Class
 C
# of field plots
 species was recorded in:
 28
Modal BEC Zone Class
 ESSF

All BEC Zones (# of stations/zone) species was recorded in

 BG(3), BWBS(2), ESSF(10), ICH(7), IDF(1), MS(1), SBS(2)

Habitat and Range

Moist meadows and wet sandy lakeshores from the lowland and steppe to subalpine zones; infrequent throughout BC; circumpolar, N to AK, YT, and NT, E to NF and S to MA, WV, PA, MI, WI, MN, NE, NM, UT, ID and OR; Eurasia, Patagonia.

Source:  The Illustrated Flora of British Columbia

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