Menyanthes trifoliata



Legal Status: Unwanted Organism - DOC
Status in New Zealand: Established
Organism: Land plants

This plant is considered eradicated in New Zealand.


Bogbean is a perennial plant that can grow in bogs and marshes and at the fringes of lakes or slow- flowing rivers. Bogbean has a creeping rootstock and thick green stems that often trail along the surface of the water body. It has very characteristic three-lobed light-green hairless leaves that emerge from the water. These die back in winter. In early summer long stalks bear pale-rose-coloured flowers (2.5 cm across) clustered together in a thick short spike. The inner petals are white and hairy, with reddish stamens. The flowers produce round orange seeds.


Bogbean grows rapidly and clogs waterways.

What to do

Contact your regional council to determine the status of this species and responsibility for control and/or advice on control.

Useful Resources

Page last updated: 22 April 2016