Agoseris aurantiaca (Hook.) Greene
Orange False Dandelion (orange agoseris)
Asteraceae (Aster family)

Introduction to Vascular Plants

Photograph

© Judith Holm     (Photo ID #52388)


Map

E-Flora BC Static Map

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

Species Information

General:
Perennial herb from a taproot and a simple or branching base; stems leafless, 1-several, exuding milky juice when broken, 10-60 cm tall.
Leaves:
All basal, extremely variable, narrowly linear-lanceolate to broadly oblanceolate, entire to laciniate or few lobed, 5-35 cm long, 1-30 mm wide, rounded to long-pointed, usually glabrate with sparse hairs along the midrib below, margins usually fringed with small hairs toward the base, the stalks purplish.
Flowers:
Heads with strap-shaped flowers, solitary; involucres top-shaped to narrowly bell-shaped; involucral bracts in about 3 series, slightly or not at all graduated, narrow, long-pointed, the outer series fringed with small hairs, usually glabrous or sometimes long-hairy on the surface; receptacles naked; ray flowers burnt orange, rarely yellow, commonly turning deep pink to purple in drying or with age.
Fruits:
Achenes smooth, 5-9 mm long, rather abruptly narrowed to a beak, which varies from about half to slightly longer than the body; pappus of numerous hairlike bristles, 9-14 mm long, silky white or sordid.

SourceThe Illustrated Flora of British Columbia

USDA Species Characteristics

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

Ecology

Ecological Framework for Agoseris aurantiaca

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)
1570 204 2500
Slope Gradient (%)
29 0 230

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

178 0 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
3 0 8
Modal Nutrient Regime
Class
D
# of field plots
 species was recorded in:
292
Modal BEC Zone Class
ESSF

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

AT(13), BAFA(27), BG(1), BWBS(4), CMA(5), CWH(27), ESSF(134), ICH(2), IDF(9), IMA(5), MH(4), MS(17), PP(1), SBPS(2), SBS(12), SWB(12)

Habitat and Range

Mesic to dry open forests and meadows in the upper montane to alpine zones; frequent throughout BC; N to YT and NT; E to PQ and S to NM and CA

SourceThe Illustrated Flora of British Columbia