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

Utricularia macrorhiza Leconte
greater bladderwort (common bladderwort)
Lentibulariaceae (Bladderwort family)

Introduction to Vascular Plants

© Brian Klinkenberg  Email the photographer   (Photo ID #29202)

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

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Perennial aquatic herb without roots; stems very slender, floating, submerged or creeping along the bottom, leafy, up to 1 m long and 1 mm or more thick.
Alternate, numerous, 1-5 cm long, pinnatifid, divided into 2 parts at the base and then again repeatedly but unequally into more than 20 flattened ultimate segments, the segments circular in cross-section, narrowed and pointed towards the tips, margins bristly; bladders numerous, borne on the leaves and 1-3 mm wide; winter buds egg-shaped or more elliptic, 1-2 cm long, with hyaline bristles.
Inflorescence of 6-20 flowers in lax racemes at the end of stalks 6-20 cm long; corollas yellow, the lower lips saddle-shaped,1-2 cm long with well-developed cylindric spurs, upper lips shorter than the lower lips;
Capsules, stalks down-curved.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Lakes and ponds in the lowland, steppe and montane zones; common S of 55degreeN in BC, less frequent northward; amphiberingian, N to AK, YT and NT, E to NF and S to MO, VA, TX, MX and CA; E Asia.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Utricularia macrorhiza

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) 20 892 1581
Slope Gradient (%) 0 0 0
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
180 180 180
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
4 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(1), CDF(15), CWH(20), ICH(7), IDF(31), MS(4), PP(2), SBPS(12), 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.

Synonyms and Alternate Names

Utricularia vulgaris L. p.p.
Utricularia vulgaris subsp. macrorhiza (Le Conte) Clausen
Utricularia vulgaris var. americana Gray

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References