Agoseris heterophylla (Nutt.) Greene
Annual False Dandelion (annual agoseris)
Asteraceae (Aster family)

Introduction to Vascular Plants

Photograph

© Hans Roemer     (Photo ID #10220)


Map

E-Flora BC Static Map

Distribution of Agoseris heterophylla
Click here to view the full interactive map and legend

SUBTAXA PRESENT IN BC

Agoseris heterophylla ssp. heterophylla

Species Information

General:
Annual from a fibrous root; stems leafless, solitary to more often several, exuding milky juice when broken, 3-45 cm tall.
Leaves:
Mainly basal, oblanceolate to occasionally linear or lanceolate, entire to toothed or pinnatifid, 1-15 cm long, 0.1-1.5 cm wide.
Flowers:
Heads with strap-shaped flowers, solitary; involucres narrowly bell-shaped to rounded, 5-22 mm tall; involucral bracts in 1-2 series, lanceolate, abruptly sharp-pointed to attenuate, more or less long-hairy with septate, twisted hairlike growths, some of these purplish due to purplish cross-walls in the hairs; receptacles naked; ray flowers yellow, commonly pinkish upon drying.
Fruits:
Achenes several-ribbed or slightly winged, spindle-shaped, the body about 1-5 mm long, tapering to a slender beak about 2-3.5 times as long as the body; pappus of numerous hairlike bristles, 4-7 mm long, white.

SourceThe Illustrated Flora of British Columbia

Ecology

Ecological Framework for Agoseris heterophylla

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)
1058 152 2286
Slope Gradient (%)
26 0 77

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

177 60 240
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
1 0 3
Modal Nutrient Regime
Class
B
# of field plots
 species was recorded in:
22
Modal BEC Zone Class
PP

All BEC Zones (# of stations/zone) species was recorded in

AT(2), ICH(2), IDF(1), PP(3)

Habitat and Range

Dry grassy slopes, meadows and grasslands in the lowland, steppe and lower montane zones; frequent in extreme S BC; S to ID, UT, AZ and CA.

SourceThe Illustrated Flora of British Columbia