Authors: C. Stace, R. van der Meijden (ed.) & I. de Kort (ed.)
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Scientific name:

Utricularia australis

Vernacular name:

Bladderwort


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Utricularia vulgaris - Bladderwort, Greater
Utricularia intermedia - Bladderwort, Intermediate

Bladderwort

Scientific name: Utricularia australis R. Br.

Diagnostic features
Differs from Utricularia vulgaris in stems to 60cm.
Quadrifids with 2 short arms diverging at mostly 100-157°.
Glands present on inside of both abaxial and adaxial sides of spur.
Corolla pale yellow to yellow, the lower lower lip with flat or slightly upturned margins.
Pedicel 8-15mm at flowering, becoming sinuous and 10-30mm after.

Chromosome number: (2n=44).

Habitat
Native; usually acidic still or slow water.

Distribution
Scattered throughout Britain and Ireland, commonest in West & North Britain.
Distributions of Utricularia vulgaris and Utricularia australis are unclear as distinction is uncertain in absence of flowers, which are rarely produced in North Britain.

This species is keyed out on Page 179 in the Text Key.

Utricularia australis (Bladderwort)
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Bladderwort
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