Spirodela L.

Greek speira – spiral, delos – obvious.

Floating herb often aggregated into groups of 2-5 or more plants. Body flattish, ovate to elliptic or slightly kidney-shaped, the lower surface often tinged purple. Marginal pouch on lower surface near the margin. Roots 2-18. Flower cluster of 1 female and 2 male flowers together in a bract.

Grown in aquaria and tolerating a wide range of water temperatures. Spreading rapidly.

4 species from temperate and tropical areas.


Used as a supplement in stock feed and sometimes as a nutrient sink.

Roots 2 or more; veins 3 or more; lower surface often purplish.

Source: Spencer, R. (2005). Lemnaceae. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 5. Flowering plants. Monocotyledons. The identification of garden and cultivated plants. University of New South Wales Press.

Hero image
kingdom Plantae
phylum   Tracheophyta
class    Magnoliopsida
superorder     Lilianae
order      Alismatales
family       Araceae
Higher taxa
Subordinate taxa