Juncus drummondii E. Mey.
Drummond's rush
Juncaceae (Rush family)

Introduction to Vascular Plants


© Jamie Fenneman     (Photo ID #30096)


E-Flora BC Static Map

Distribution of Juncus drummondii
Click here to view the full interactive map and legend

Species Information

Perennial tufted herb from short rhizomes; stems wiry, erect, 15-40 cm tall.
Reduced to sheaths with short awns at the base of the stem, or the uppermost of the basal sheaths with blades less than 1 cm long.
Inflorescence a loose head with 1 to 4, nearly terminal flowers, appearing as if it is on the side of the stem; perianth segments green to brown, pointed, 5-7 mm long, the inner ones slightly shorter; stamens 6; anthers about 1.5 mm long, shorter than the filaments; involucral bract 1-3 cm long, cylindrical, resembling a continuation of the stem.
Capsules, cylindrical, notched, longer than the perianth segments; seeds spindle-shaped, 0.5 mm long with long, tail-like appendages at each end of the seed.
Two varieties occur in W North America. Our BC material has been identified as var. drummondii but var. subtriflorus can be expected in S BC.

1. Capsules usually at least 1 mm longer than the perianth segments; perianth 5-6 mm long.................. var. subtriflorus (E. Mey.) C.L. Hitchc.

1. Capsules about equal to the perianth segments; perianth 6-7 mm long..................var. drummondii

SourceThe Illustrated Flora of British Columbia

USDA Species Characteristics

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


Ecological Framework for Juncus drummondii

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)
1939 32 2640
Slope Gradient (%)
21 0 132

Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]

154 0 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
4 0 8
Modal Nutrient Regime
# of field plots
 species was recorded in:
Modal BEC Zone Class

All BEC Zones (# of stations/zone) species was recorded in

AT(74), BAFA(86), BG(1), CMA(40), CWH(1), ESSF(469), ICH(1), IDF(1), IMA(46), MH(31), MS(4), SBS(2), SWB(10)

Habitat and Range

Mesic to moist rocky slopes, heaths, snowbed sites, streambanks, open forests and meadows in the subalpine and alpine zones; common throughout BC; N to YT and NT, E to AB and S to NM and NV.

SourceThe Illustrated Flora of British Columbia