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

Introduction to Vascular Plants

Photograph

© Gordon Neish     (Photo ID #19271)


Map

E-Flora BC Static Map

Distribution of Erigeron compositus
Click here to view the full interactive map and legend

Species Information

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

SourceThe 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

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

Avg

Min

Max

Elevation (metres)
1373 252 2682
Slope Gradient (%)
25 0 150

Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]

198 0 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
2 0 5
Modal Nutrient Regime
Class
C
# 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)

Habitat and 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.

SourceThe Illustrated Flora of British Columbia

Synonyms

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.