Mentzelia dispersa S. Watson
bushy mentzelia (bushy blazingstar)
Loasaceae (Loasa family)

Introduction to Vascular Plants


© Peter Courtney     (Photo ID #73019)


E-Flora BC Static Map

Distribution of Mentzelia dispersa
Click here to view the full interactive map and legend

Species Information

Annual herb from a taproot; stems ascending to erect, several, simple or branched, white-shiny, usually somewhat barbed throughout, sometimes becoming glabrous, 10-40 cm tall.
Basal leaves linear to shallowly lobed, 2-11 cm long; stem leaves alternate, often pinnatifid, linear to lanceolate, 2-11 cm long, lobed or unlobed, unstalked and entire to few-toothed above.
Inflorescence of few, unstalked flowers in a tight, terminal cluster; petals 5, yellow, 3-6 mm long; calyces 1-2 cm long, hairy, the lobes 2-4 mm long; stamens shorter than the petals; bracts egg-shaped.
Capsules, linear, 1-3 cm long; seeds 15-30, obscurely rough-pimply, appearing glabrous under 10x magnification, not flattened.

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 Mentzelia dispersa

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)
707 510 905
Slope Gradient (%)
44 36 53

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

149 140 160
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
1 1 2
Modal Nutrient Regime
# of field plots
 species was recorded in:
Modal BEC Zone Class

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

BG(1), IDF(1)

Habitat and Range

Dry slopes in the steppe zone; infrequent in SC BC; S to CO and CA.

SourceThe Illustrated Flora of British Columbia