Adenocaulon bicolor Hook.
pathfinder (American trailplant)
Asteraceae (Aster family)

Introduction to Vascular Plants


© Jeanne Ross     (Photo ID #13075)


E-Flora BC Static Map

Distribution of Adenocaulon bicolor
Click here to view the full interactive map and legend

Species Information

Perennial herb from fibrous roots; stems slender, erect, 0.3-1.0 m tall, solitary, branched above, white-woolly on lower part, with stalked glands on upper part.
Mostly basal, large and thin, 10-30 cm long, 3-15 cm wide, long-stalked, broadly triangular to heart-shaped, green and essentially glabrous above, white-woolly below; margins smooth to coarsely toothed; stem leaves similar to basal, few, alternate.
Heads discoid, small, several to numerous, in a branched, nearly naked, glandular inflorescence; rays lacking; disk flowers whitish, tubular, only the outer 3-7 fertile; involucres 2-3.5 mm tall, the bracts green, glabrous, equal in size, pointing down when mature and eventually deciduous.
Club-shaped achenes, 5-8 mm long, with stalked glands on upper portion; pappus lacking.

SourceThe Illustrated Flora of British Columbia


If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.


Ecological Framework for Adenocaulon bicolor

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




Elevation (metres)
747 0 1855
Slope Gradient (%)
21 0 110

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

199 0 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
4 1 7
Modal Nutrient Regime
# of field plots
 species was recorded in:
Modal BEC Zone Class

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

CDF(66), CWH(329), ESSF(22), ICH(726), IDF(72), MH(1), MS(33), PP(1), SBPS(1), SBS(8)

Habitat and Range

Moist to mesic forests in the lowland and montane zones; common in S BC; E to AB, S to ID, MT and N CA, disjunct in N MI.

SourceThe Illustrated Flora of British Columbia