Bladderwort Species

Also known as:
Bladder Wort

General description

Creeping terrestrial bladderworts. Broad green leaves up to 2.5 cm long lie flat on the ground, thin creeping stems at the base of leaves. Underground roots have tiny "sacs" which trap insects. The main difference between the Utricularias are their flowers, produced in summer, range from white to pale blue/mauve. U. sandersonii has an upper flower lobe divided into two spreading lobes (like rabbits ears). U. livida and U. arenaria both have undivided upper flower lobes, but have differing flower spur length. U. arenaria has a long spur projecting below the flower lobe, whereas U. livida has a shorter spur behind the flower lobe.


Seed dispersed by water movement.

Specially adapted to low nutrient environments such as bogs and swamps, and outcompete native bladderworts also adapted to similar environments.

Site management

Recommended approaches

1. Mechanical removal or weed matting at small sites.
2. There are no known chemical control methods.

Caution: when using any herbicide or pesticide PLEASE READ THE LABEL THOROUGHLY to ensure that all instructions and safety requirements are followed.

RPMS status

Surveillance - Whole Region
National Pest Plant Accord species - nationwide
bladderwort species - Main species image