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

Erigeron peregrinus (Banks ex Pursh) Greene
subalpine daisy (subalpine fleabane)
Asteraceae (Aster family)

Introduction to Vascular Plants

© Amelie Rousseau  Email the photographer   (Photo ID #6357)

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Distribution of Erigeron peregrinus
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Species Information

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PDAST3M33A
PDAST3M332


General:
Perennial herb from a rhizome or short, stout stem-base; stems erect, simple, glabrous to moderately long-hairy below, usually densely long-hairy beneath the heads, 5-70 cm tall.
Leaves:
Basal leaves linear-lanceolate to linear-oblanceolate or broadly oblanceolate to spoon-shaped, tapering to the stalk, glabrous, often long-fringed with small hairs on the margins or sometimes sparsely long-hairy on the main veins or over the entire surfaces, 1-20 cm long, 0.2-4.5 cm wide; lower stem leaves similar; middle and upper stem leaves linear to broadly egg-shaped, occasionally more or less clasping, up to 8 cm long and 3 cm wide, sometimes lacking in smaller forms.
Flowers:
Heads with ray and disk flowers, mostly solitary, sometimes as many as 8, the disks 10-25 mm wide; involucres 7.5-11 mm tall; involucral bracts glandular and rarely with a few hairs (ssp. callianthemus) or long-hairy or sometimes sticky and fringed with small hairs (ssp. peregrinus), linear, tapering to a slender tip, loose, mostly rather leafy and about equal; ray flowers 30-80, reddish- to dark-purplish, lavender or sometimes white, 8-25 mm long, 2-4 mm wide; disk flowers 4-6 mm long.
Fruits:
Achenes asymmetrically 4- to 7-nerved, sparsely hairy; pappus single and of 20-30 bristles or double and the outer of a few scales.
Notes:
Cronquist (1947) has provided the only comprehensive treatment for this extremely variable complex. Unfortunately, he was unable to observe all seven varieties he recognized in the field. In the Pacific Northwest these varieties, which were based mainly on plant size and leaf shape, often grow together and show a continuous variation reflecting the harshness of the micro-habitats. Even the two subspecies recognized here intergrade frequently where the ranges overlap in BC and WA. The two subspecies may be separated as follows:

1. Involucral bracts long-hairy or sometimes sticky and fringed with small hairs margins............................ ssp. peregrinus

1. Involucral bracts glandular, rarely with a few long hairs.............................. ssp. callianthemus (Greene) Cronq.

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

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

Habitat / Range

Wet to moist stream banks, open forests, rocky slopes and meadows in all but the steppe zone; ssp. peregrinus - common in and W of the Coast-Cascade Mountains, rare E of the Coast-Cascade Mountains, ssp. callianthemus - common throughout BC except absent on the Queen Charlotte Islands; N to AK and YT, E to AB, and S to UT, NM and CA.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Erigeron peregrinus

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) 15 1792 2611
Slope Gradient (%) 0 23 220
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
0 185 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 4 8
Modal Nutrient Regime
Class
C
Number of field plots
 species was recorded in:
2421
Modal BEC Zone Class
ESSF
All BEC Zones (# of stations/zone) species was recorded in: AT(202), BAFA(101), BWBS(11), CMA(25), CWH(40), ESSF(1498), ICH(17), IDF(7), IMA(77), MH(81), MS(72), PP(1), SBPS(2), SBS(21), SWB(51)

Ecological Indicator Information

A very shade-intolerant, subalpine to alpine, Asian and Western North American forb distributed equally in the Pacific and Cordilleran regions. Occurs on alpine tundra and subalpine boreal climates on moist to wet, nitrogen-rich soils (Moder and Mull humus forms). Common in high-elevation meadows, less often in subalpine parkland on water-receiving sites with friable organic materials. Its occurrence increases with increasing latitude. Characteristic of alpine and subalpine communities.

SourceIndicator Plants of Coastal British Columbia (Information applies to coastal locations only)

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 alpine tundra & boreal.

Taxonomic and Nomenclatural Links

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General References