- a plant of bogs and shallow water with creeping rhizomes, beanlike leaves that consist of three leaflets, and white or pinkish hairy flowers. Formerly used as a substitute for hops, it is now cultivated as an ornamental aquatic plant. Also called bogbean.
- Menyanthes trifoliata, family Menyanthaceae
late 16th century: from Flemish bocks boonen 'goat's beans'