Juncus articulatus L.
jointed rush (jointleaf rush)
Juncaceae (Rush family)
Introduction to Vascular Plants
jointed rush (jointleaf rush)
Juncaceae (Rush family)
Introduction to Vascular Plants
Species Information
General:
Perennial, loosely tufted herb from short rhizomes; stems often decumbent, 10-65 cm tall, often rooting at the nodes.
Leaves:
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.
Flowers:
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.
Fruits:
Capsules, tapered to the tips, slightly longer than the perianth segments; seeds barrel-like, about 0.4 mm long, lacking tail-like appendages.
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.
Illustration Source: The Illustrated Flora of British Columbia
USDA Species Characteristics
Flower Colour:
Purple
Blooming Period:
Early Summer
Fruit/Seed characteristics:
Colour: Brown
Present over the Summer
Source: The USDA
Ecology
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)
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) |
1020 | 360 | 2180 |
| Slope
Gradient (%) |
7 | 0 | 65 |
|
Aspect (degrees) |
336 | 50 | 335 |
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
6 | 4 | 8 |
| Modal
Nutrient Regime
Class |
D | ||
| #
of field plots species was recorded in: |
10 | ||
| Modal
BEC Zone Class |
IDF | ||
|
All BEC Zones (# of stations/zone) species was recorded in |
BWBS(1), CWH(1), ESSF(2), ICH(1), IDF(4) | ||
|
Source:
Klinkenberg 2013
|
|||
Habitat and 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.Status Information
Synonyms
Synonyms and Alternate Names:
Juncus articulatus var. obtusatus Engelm.
Luzula hyperborea R. Br. p.p.