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

Juncus articulatus L.
jointed rush (jointleaf rush)
Juncaceae (Rush family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #10173)

E-Flora BC Static Map
Distribution of Juncus articulatus
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Species Information

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Perennial, loosely tufted herb from short rhizomes; stems often decumbent, 10-65 cm tall, often rooting at the nodes.
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, rounded, ear-shaped lobes.
Inflorescence terminal, 7-15 cm long, open, the heads numerous, small, conic, mostly 6- to 12-flowered; perianth segments dark brown, (2) 2.5-3 mm long, pointed, the inner about equal to the outer; stamens 6; anthers shorter than the filaments.
Capsules, tapered to the tips, slightly longer than the perianth segments; seeds barrel-like, about 0.4 mm long, lacking tail-like appendages.

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

Flower Colour:
Blooming Period:
Early Summer
Fruit/Seed characteristics:
Colour: Brown
Present over the Summer
Source:  The USDA

Habitat / Range

Lakeshores, riverbanks and disturbed soil in the lowland, steppe and montane zones; common in BC south of 55degreeN; circumpolar, N to AK, disjunct E to ON, PQ and NF and S to ME, PA, NC, KY, IL, MN, NE, NM, AZ and CA; Eurasia.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Juncus articulatus

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) 360 1020 2180
Slope Gradient (%) 0 7 65
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
50 336 335
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
4 6 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: BWBS(1), CWH(1), ESSF(2), ICH(1), IDF(4)


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 articulatus var. obtusatus Engelm.
Luzula hyperborea R. Br. p.p.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References