Erigeron annuus (L.) Pers.
annual fleabane (annual daisy; eastern daisy fleabane)
Asteraceae (Aster family)
Introduction to Vascular Plants
annual fleabane (annual daisy; eastern daisy fleabane)
Asteraceae (Aster family)
Introduction to Vascular Plants
Species Information
General:
Annual or occasionally biennial herb from a fibrous root; stems erect, usually solitary, branched above, spreading, long-hairy, 0.3-1.5 m tall.
Leaves:
Basal leaves stiff-hairy, coarsely toothed, elliptic to broadly egg-shaped, 1-10 cm long, 0.5-7 cm wide, or sometimes larger; stem leaves numerous, broadly lanceolate or broader.
Flowers:
Heads with ray and disk flowers, several to numerous in a large, leafy inflorescence, the disks 6-10 mm wide; involucres 3-5 mm tall; involucral bracts finely glandular, sparsely long-hairy, tips tapering to a slender tip; ray flowers about 80-125, white, 0.5-1 mm wide, up to 10 mm long; disk flowers 2-2.8 mm long.
Fruits:
Achenes hairy, 2-nerved; pappus double, the outer of short bristly scales, the inner of 10-15 short, fragile bristles, these lacking from the ray flowers.
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
Ecology
Ecological Framework for Erigeron annuus
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) |
1623 | 1623 | 1623 |
| Slope
Gradient (%) |
55 | 55 | 55 |
|
Aspect (degrees) |
30 | 30 | 30 |
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
3 | 2 | 5 |
| Modal
Nutrient Regime
Class |
D | ||
| #
of field plots species was recorded in: |
3 | ||
| Modal
BEC Zone Class |
BAFA | ||
|
All BEC Zones (# of stations/zone) species was recorded in |
BAFA(1), CWH(1) | ||
|
Source:
Klinkenberg 2013
|
|||
Habitat and Range
Dry roadsides and disturbed areas in the lowland zone; infrequent in SW BC, known only from the lower Fraser Valley; ranges throughout most of North America, native status uncertain.Status Information
Synonyms
Synonyms and Alternate Names:
Erigeron annuus var. discoideus (Victorin & Rouss.) Cronquist
Stenactis annua (L.) Nees