Subordinate Taxa
Scientific Name:

Aquatic or subaquatic perennial herbs with stems free-floating or rooted in the ground.  Lvs usually alternate, sometimes opposite on flowering shoots; petiole sheathing at base.  Infl. a fascicle, involucrate head, or simple paniculate cyme.  Fls ☿, actinomorphic, 5-merous.  Calyx deeply 5-lobed.  Corolla 5-lobed, usually deeply so;  lobes ± valvate in bud, with margins wing-like, and sometimes fimbriate or crested.  Stamens 5, inserted on the sinuses between the corolla lobes or on the corolla tube;  anthers sagittate, versatile.  Ovary superior or semi-inferior, 1-locular, with 2 parietal placentae;  style 1, 2-fid.  Ovules few to numerous.  Fr. capsular or indehiscent.  Seeds endospermic, sometimes winged.

[From:  Webb et al. (1988) Flora of New Zealand. Volume 4.]

Number of species in New Zealand within Menyanthaceae
Indigenous (Non-endemic)1
Exotic: Fully Naturalised1
Exotic: Casual2
Exotic: Presence uncertain1
Cronquist, A. 1988: The evolution and classification of flowering plants. The New York Botanic Gardens, New York.
Mabberley, D.J. 2008: Mabberley's plant book, a portable dictionary of plants, their classification and uses. Edition 3. Cambridge University Press.