Lemna disperma Hegelm.

Fronds floating on water surface, obovate, with obtuse to shortly pointed tip, 0.8–4 mm long, 1–2 times as long as wide, flat or gibbous, entire, with distinct papule near apex and above node, sometimes red on lower surface, especially near margins, occasionally with distinct reddish spots on upper surface, without green stalk; nerves 3–5, the lateral nerves originating from node; air spaces in 2 or 3 layers spreading through most of frond, with largest ones mostly longer than 0.3 mm. No distinct turions present. Roots to 15 cm long; sheath not winged; tip usually rounded. Flowers 1 or 2 (–3)-ovulate. Fruit 0.7–0.8 mm long, with lateral wings towards top. Seeds with 10–16 distinct ribs.

It grows in temperate places. It grows in ponds and lagoons in still water which can be fresh or brackish. Tasmania Herbarium.

Plants can be grown by throwing small amounts into still water especially in water rich in nitrates and slightly alkaline.