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

Erigeron annuus (L.) Pers.
annual fleabane (annual daisy; eastern daisy fleabane)
Asteraceae (Aster family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #13962)

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

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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.

Source: The Illustrated Flora of British Columbia

Habitat / 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.

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)

Site Information
Value / Class

Minimum

Average

Maximum

Elevation (metres) 1623 1623 1623
Slope Gradient (%) 55 55 55
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
30 30 30
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
2 3 5
Modal Nutrient Regime
Class
D
Number 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)

Climate

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 cool temperate & cool mesothermal.

Synonyms and Alternate Names

Erigeron annuus var. discoideus (Victorin & Rouss.) Cronquist
Stenactis annua (L.) Nees

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References