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

Luzula arcuata (Wahlenb.) Sw.
Curved Woodrush (Bitterroot; curved wood-rush)
Juncaceae (Rush family)

Introduction to Vascular Plants
Once images have been obtained, photographs of this species will be displayed in this window.Click on the image to enter our photo gallery.
Currently no image is available for this taxon.
E-Flora BC Static Map
Distribution of Luzula arcuata
Click here to view our NEW interactive map and legend
Details about map content are available here
Click on the map dots to view record details.

Luzula arcuata ssp. unalaschcensis

Species Information

Click on the image below to view an expanded illustration for this species.

Perennial, loosely tufted herb from short rhizomes; stems 10-25 cm tall.
Flat or channeled, sparsely fringed with fine hairs, about 5-15 cm long, 1.5-3 mm wide, gradually tapering to sharp tips; basal sheaths reddish-brown, dull.
Inflorescence open, with 5 to 10, dark to blackish brown, dense clusters of 3 to 6 flowers on long, spreading stalks, the outer clusters on arching stalks; perianth segments brown, 2-3 mm long, narrowly lanceolate, pointed, the inner about the same length as the outer; stamens 6; anthers 0.4-0.6 mm long, about the same length as the filaments; bractlets strongly fringed with coarse hairs, nearly equal or sometimes surpassing the flowers; lower bract poorly developed.
Capsules, ellipsoid, pointed, shorter than the perianth segments; seeds cylindrical to egg-shaped, dark brown, 1-1.2 mm long, with minute appendages, with a few short threads at the base.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Dry to moist meadows in the subalpine and alpine zones; infrequent throughout BC, except absent in NE BC; amphiberingian, N to AK, YT and NT, E to AB and S to MT and WA; E Asia.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Luzula arcuata

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) 1000 1966 2375
Slope Gradient (%) 0 16 75
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
0 197 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 3 8
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: AT(6), BAFA(41), ESSF(7), IMA(20), MH(1), SWB(2)

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References