Erigeron filifolius (Hook.) Nutt. (Hook.) Nutt.
thread-leaved fleabane (threadleaf fleabane; thread-leaved daisy)
Asteraceae (Aster family)
Introduction to Vascular Plants
thread-leaved fleabane (threadleaf fleabane; thread-leaved daisy)
Asteraceae (Aster family)
Introduction to Vascular Plants
Species Information
General:
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.
Leaves:
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.
Flowers:
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.
Fruits:
Achenes 2-nerved, more or less hairy or glabrous; pappus simple, of 20-30 slender but firm, white bristles, rarely with inconspicuous outer scales.
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.
Illustration Source: The Illustrated Flora of British Columbia
USDA Species Characteristics
Flower Colour:
Purple
Blooming Period:
Late Summer
Fruit/Seed characteristics:
Colour: Brown
Present from Summer to Fall
Source: The USDA
Ecology
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)
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) |
681 | 260 | 1926 |
| Slope
Gradient (%) |
26 | 0 | 170 |
|
Aspect (degrees) |
188 | 10 | 360 |
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
2 | 0 | 7 |
| Modal
Nutrient Regime
Class |
C | ||
| #
of field plots species was recorded in: |
278 | ||
| Modal
BEC Zone Class |
BG | ||
|
All BEC Zones (# of stations/zone) species was recorded in |
BG(118), ESSF(1), ICH(1), IDF(66), PP(77) | ||
|
Source:
Klinkenberg 2013
|
|||
Habitat and 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.Status Information
Synonyms
Synonyms and Alternate Names:
Erigeron filifolius var. filifolius (Hook.) Nutt.
Erigeron filifolius var. typicus Cronq.