Symphyotrichum boreale (Torr. & A. Gray) Á. Löve & D. Löve
rush aster
Asteraceae (Aster family)

Introduction to Vascular Plants


© Jamie Fenneman     (Photo ID #10316)


E-Flora BC Static Map

Distribution of Symphyotrichum boreale
Click here to view the full interactive map and legend

Species Information

Perennial herb from a slender, rhizome, seldom over 2 mm thick; stems erect, simple or branched above, glabrous below becoming hairy above, 15 to 80 cm tall.
Basal leaves reduced and soon deciduous; stem leaves linear, unstalked with rounded bases, glabrous, entire or inconspicuously toothed, 2-7 cm long, 2-9 mm wide, becoming reduced above.
Heads with ray and disk flowers, solitary (in reduced plants) to many in a short, usually broad inflorescence; involucres 5-7 mm tall; involucral bracts more or less graduated, oblong, abruptly sharp-pointed, glabrous, often with purplish tips or margins; ray flowers 20-50, white or rarely pale bluish, 12-20 mm; disk flowers yellow.
Achenes several-nerved, hairy; pappus white.

SourceThe Illustrated Flora of British Columbia


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.


Ecological Framework for Symphyotrichum boreale

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)
943 30 1480
Slope Gradient (%)
0 0 25

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

164 30 216
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
6 3 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

BG(1), BWBS(8), ESSF(3), ICH(13), IDF(29), MS(6), SBPS(23), SBS(13)

Habitat and Range

Marshes, bogs, fens and lakesides from the lowland to subalpine zones; common in S BC, less frequent northward; N to AK, YT and NT, E to PQ, PE and NS and S to NJ, MN, SD, CO, ID and OR

SourceThe Illustrated Flora of British Columbia


Synonyms and Alternate Names:
Aster borealis (Torr. & A. Gray) Prov.
Aster franklinianus Rydb.
Aster junceus auct. non Aiton
Aster junciformis Rydb.
Aster laxifolius var. borealis Torr. & A. Gray