Flora of New Zealand Series

Leaves of two kinds: submersed, narrow-elliptic, ± translucent; floating, often long-petiolate, mostly broad-oval, firm and opaque, longitudinal nerves c. 11-(13). Spike (1)-2-2.5 cm long, dense. Achenes flattened with 3-ridged keel, green to brown.

N., S., St., Ch. Common in ponds, lakes, still and slow waters where there is some silt on the bottom.

FL. 11-2. FT. 12-3.