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

Juncus alpinoarticulatus Chaix
alpine rush (northern green rush)
Juncaceae (Rush family)

Introduction to Vascular Plants

© Adolf Ceska  Email the photographer   (Photo ID #11502)

E-Flora BC Static Map
Distribution of Juncus alpinoarticulatus
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.

Species Information

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

Perennial, loosely tufted herb from short rhizomes; stems erect, 15-45 cm tall.
Located on the lower part of the stem, nearly circular in cross-section, tapered, the early leaves stiff, with prominent complete cross-walls; sheaths open, with short, pointed, ear-shaped lobes.
Inflorescence terminal, 3-7 cm long, the few to several heads cone-shaped, mostly 3- to 6- (10-) flowered, the branches few, erect; perianth segments brown or purplish-brown, 2-2.5 mm long, generally blunt and rounded but the inner shorter and the outer longer and pointed; stamens 6; anthers shorter than the filaments; involucral bracts usually shorter than the inflorescence.
Capsules, rounded at the tops, about as long as the perianth segments or slightly longer; seeds spindle-shaped, about 0.4 mm long, lacking appendages.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Lakeshores, riverbanks, gravel bars, bogs and marshes from the lowland to subalpine zones; infrequent throughout BC; circumpolar, N to AK, YT and NT, E to NF and S to ME, PA, IN, IL, IA, NE, CO, UT, ID and WA; Greenland, Eurasia.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Juncus alpinoarticulatus

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) 823 1081 1212
Slope Gradient (%) 0 4 17
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
120 127 135
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
3 5 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), IDF(2)


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 alpinus
Juncus geniculatus

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References