Perennial herb from elongated rhizomes; stems arising singly, erect, 15-25 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 rounded, ear-shaped lobes.
Numerous, in single, terminal, hemispheric heads; perianth segments dark brown, 3-4.5 mm long, pointed, the inner about the same length or shorter than the outer; stamens 6; anthers 0.6 mm long, shorter than the filaments; involucral bract solitary, short, equalling or exceeding the inflorescence.
Capsules, cylindrical to egg-shaped, rounded or with small depressions, slightly shorter than the perianth segments; seeds barrel-like, about 0.4 mm long, lacking tail-like appendages.
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
Present over the Summer
Source: The USDA
||Value / Class
Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
of field plots
species was recorded in:
BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in
|AT(20), BAFA(19), CMA(9), CWH(3), ESSF(123), ICH(3), IDF(1), IMA(7), MH(11), MS(1), SBS(2), SWB(4)|
Source: Klinkenberg 2013
Synonyms and Alternate Names:
Juncus columbianus Coville
Juncus mertensianus subsp. mertensianus
Juncus mertensianus var. columbianus (Coville) F.J. Herm.
Juncus slwookoorum S.B. Young