Juncus stygius L.
bog rush (moor rush)
Juncaceae (Rush family)
Introduction to Vascular Plants
bog rush (moor rush)
Juncaceae (Rush family)
Introduction to Vascular Plants
SUBTAXA PRESENT IN BC
Juncus stygius var. americanus
Species Information
General:
Perennial, loosely tufted herb; stems erect, 10-25 cm tall.
Leaves:
Located on the lower part of the stem, nearly circular in cross-section, tapered, lacking cross-walls.
Flowers:
Inflorescence of 1 to 3, terminal heads of 2 to 5 flowers, the flowers lacking involucral bractlets; perianth segments green or light brown with wide translucent margins, 3.5-4.5 mm long, egg-shaped, subequal, blunt; stamens 6; anthers 0.4-0.7 mm long, shorter than the filaments; bracts leaflike, usually slightly longer than the inflorescence.
Fruits:
Capsules, blunt, 1.5 times longer than the perianth segments, pale brown to straw-coloured, 5-6 mm long; seeds spindle-shaped, about 1.2-1.4 mm long, with tail-like appendages at each end.
Notes:
Plants from N America and E Asia have sometimes been separated into var. americanus. The taxonomic status of this variety is doubtful.
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
Ecology
Ecological Framework for Juncus stygius
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) |
780 | 780 | 780 |
| Slope
Gradient (%) |
0 | 0 | 0 |
|
Aspect (degrees) |
0 | ||
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
8 | 8 | 8 |
| Modal
Nutrient Regime
Class |
C | ||
| #
of field plots species was recorded in: |
2 | ||
| Modal
BEC Zone Class |
SBS | ||
|
All BEC Zones (# of stations/zone) species was recorded in |
SBS(1) | ||
|
Source:
Klinkenberg 2013
|
|||
Habitat and Range
Pond margins and peat bogs in the lowland and montane zones; rare in coastal BC north of 50degreeN and in EC BC; circumpolar, N to AK, YT and NT, E to NF and S to ME, MI, WI and MN; Eurasia.Status Information
Synonyms
Synonyms and Alternate Names:
Juncus stygius subsp. americanus (Buchenau) Hultén