E-Flora BC: Electronic Atlas of the Flora of British Columbia

Erigeron filifolius (Hook.) Nutt. (Hook.) Nutt.
thread-leaved fleabane (threadleaf fleabane; thread-leaved daisy)
Asteraceae (Aster family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #10768)

E-Flora BC Static Map
Distribution of Erigeron filifolius
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Species Information

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Perennial herb from a taproot and branched, woody stem-base; stems ascending to erect, simple to branched above, with finely-appressed, stiff, basally-swollen hairs, densely so at the base, 10-50 cm tall.
Basal leaves linear to threadlike, entire, 1-8 cm long, 0.3-3 mm wide, hairy like the stems; stem leaves similar, evenly distributed along the stem, gradually reduced upwards.
Heads with ray and disk flowers, solitary or several, the disks 5-15 mm wide; involucres 4-6 mm tall; involucral bracts with closely-appressed, long, stiff, basally swollen hairs and/or finely glandular, somewhat thickened on the back, subequal; ray flowers 15-50 (70), blue, sometimes pink or white, 3-13 mm long, 1-2 mm wide; disk flowers about 2.5-4.4 mm long.
Achenes 2-nerved, more or less hairy or glabrous; pappus simple, of 20-30 slender but firm, white bristles, rarely with inconspicuous outer scales.

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

Flower Colour:
Blooming Period:
Late Summer
Fruit/Seed characteristics:
Colour: Brown
Present from Summer to Fall
Source:  The USDA

Habitat / Range

Dry grassy or shrubby slopes and open forests in the steppe and lower montane zones; common in SC and SE BC; S to MT, WY and CA.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Erigeron filifolius

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) 260 681 1926
Slope Gradient (%) 0 26 170
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
10 188 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 2 7
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: BG(118), ESSF(1), ICH(1), IDF(66), PP(77)


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Erigeron filifolius var. filifolius (Hook.) Nutt.
Erigeron filifolius var. typicus Cronq.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References