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

Erigeron compositus Pursh
cut-leaved daisy (cutleaf daisy)
Asteraceae (Aster family)

Introduction to Vascular Plants

© Reg Newman  Email the photographer   (Photo ID #12167)

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

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General:
Perennial herb from a taproot and stout, thickened stem-base; stems erect, simple, densely glandular and spreading-hairy to nearly glabrous, 3-25 cm tall.
Leaves:
Basal leaves 3-forked or 2-4 times divided in 3's, hairy like the stems, 5-8 cm long (including the long stalk); stem leaves few, reduced, mostly linear and entire.
Flowers:
Heads with ray and disk flowers (sometimes discoid), solitary, the disks 8-20 mm wide; involucres 5-10 mm tall; involucral bracts thin, subequal and purplish, at least at the tips; ray flowers 20-60, white, pink or blue, up to 12 mm long and 2 mm wide; disk flowers 3-5 mm long.
Fruits:
Achenes 2-nerved, long stiff-hairy; pappus simple, of 12-20 bristles.
Notes:
The var. discoideus A. Gray, although known from adjacent WA and YT, has yet to be collected in BC. Most BC material named such are misidentifications of E. salishii and E. trifidus. The var. discoideus was first recorded in BC in 1999 at Merritt (Douglas et al. 2002). The two varieties may be distinguished as follows:

1. Leaves 2-4 times divided in 3's................ var. glabratus Macoun

1. Leaves 3-forked..................... var. discoideus A. Gray

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

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

Habitat / Range

Dry rocky meadows, scree slopes, fellfields and gravelly river terraces from the steppe to alpine zones; common throughout BC (var. glabratus), rare in SC BC (var. discoideus); var. glabratus N to AK, YT and NT, E to NF and S to AZ and CA, var. discoideus N to YT and S to CO and WA.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Erigeron compositus

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) 252 1373 2682
Slope Gradient (%) 0 25 150
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
0 198 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 2 5
Modal Nutrient Regime
Class
C
Number of field plots
 species was recorded in:
581
Modal BEC Zone Class
IDF
All BEC Zones (# of stations/zone) species was recorded in: AT(65), BAFA(11), BG(138), BWBS(1), CMA(1), ESSF(103), ICH(1), IDF(149), IMA(19), MH(1), MS(24), PP(35), SWB(5)

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 not evaluated, unknown or variable.

Synonyms and Alternate Names

Erigeron compositus var. discoideus Gray
Erigeron compositus var. glabratus Macoun
Erigeron compositus var. multifidus (Rydb.) J.F. Macbr. & Payson
Erigeron compositus var. typicus Hook.

Taxonomic and Nomenclatural Links

Additional Photo Sources

Related Databases

General References