Symphyotrichum bracteolatum (A. Gray) G.L. Nesom
Eaton's aster
Asteraceae (Aster family)

Introduction to Vascular Plants

Photograph

© Paul Handford     (Photo ID #68747)


Map

E-Flora BC Static Map

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

Species Information

General:
Perennial herb from a creeping rhizome; stems erect to ascending, minutely and uniformly hairy, 0.4-1.0 m tall.
Leaves:
Basal leaves mostly deciduous by flowering time; stem leaves linear to lanceolate, unstalked, glabrous to short, rough-hairy, 5-15 cm long, 4-20 mm wide, often with shorter, linear axillary leaves.
Flowers:
Heads with ray and disk flowers, numerous in a relatively narrow, branching inflorescence; involucres 4.5-10 mm tall; involucral bracts oblanceolate to spoon-shaped or the inner ones linear, abruptly sharp-pointed, often loose, fringed below, glabrous on the backs, the leafy tips of the outer ones longer than the pale base and spreading; ray flowers 20-40, white, pink or rarely lavender or blue, 5-12 mm long; disk flowers yellow.
Fruits:
Achenes several-nerved, sparsely hairy; pappus white.
Notes:
This species was treated as Aster bracteolatus by Douglas (1989, 1995) based on the examination of the type specimen by Dr. K.L. Chambers (Dean and Chambers 1983). More recently, Dr. G.A. Allen (1993, pers. comm.), retained the use of A. eatonii since there is still confusion as to which taxon the type specimen actually represents.

SourceThe Illustrated Flora of British Columbia

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.

Ecology

Ecological Framework for Symphyotrichum bracteolatum

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)
1067 590 1610
Slope Gradient (%)
10 0 50

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

288 45 335
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
5 3 7
Modal Nutrient Regime
Class
C
# of field plots
 species was recorded in:
13
Modal BEC Zone Class
IDF

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

ICH(1), IDF(5), MS(3), PP(1), SBPS(1)

Habitat and Range

Moist to wet marshes, streamsides, lakesides and ditches in the lowland, steppe and lower montane zones; frequent in S BC; E to SK and S to NM and CA.

SourceThe Illustrated Flora of British Columbia

Synonyms

Synonyms and Alternate Names:
Symphyotrichum eatonii (A. Gray) G.L. Nesom