E-Flora BC: Electronic Atlas of the Flora of British Columbia

Utricularia minor L.
lesser bladderwort
Lentibulariaceae (Bladderwort family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #10743)

E-Flora BC Static Map
Distribution of Utricularia minor
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Species Information

Click on the image below to view an expanded illustration for this species.

Perennial aquatic herb without roots; stems very slender, floating, submerged or creeping along the bottom, leafy, up to 75 cm long.
Alternate, numerous, 0.3-1 cm long, divided into 3 parts at the base and then again 1-3 times into 5 flattened, ultimate segments, narrowed towards the tips, margins glabrous; bladders few, borne on the leaves and 1-2 mm wide; winter buds 2-9 mm long, glabrous.
Inflorescence of 3-9 flowers in lax racemes at the end of stalks 4-15 cm long; corollas pale yellow, the tubes short, lower lips narrow, 4-8 mm long, spurs sac-like, poorly developed as a hump below the lower lip; bracts ear-like at the bases.
Capsules, stalks recurved; seeds not winged.
The illustration U. minor in Hitchcock et al. (1959) is actually of U. ochroleuca (Ceska and Bell 1973). See the latter paper for flower and leaf illustrations of our Utricularia species.

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

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

Habitat / Range

Oligotrophic and dystrophic (low nutrient) lakes and peatbog pools in the lowland and montane zones; common on Vancouver Island and the Queen Charlotte Islands, less frequent inland; circumpolar, N to AK, YT and NT, E to NF and S to PA, NJ, ND, CO and CA; Eurasia.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Utricularia minor

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) 20 794 1225
Slope Gradient (%) 0 0 7
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
40 202 250
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
7 7 8
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: BWBS(5), CDF(3), CWH(8), ICH(2), IDF(8), MS(2), SBPS(5), SBS(5)


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References