Lemna trisulca

Duckweed ( Lemna trisulca )

The Duckweed ( Lemna trisulca ) is one of seven species of the genus duckweed ( Lemna ). These have recently been in the family of the Araceae (formerly Lemnaceae ). Duckweed usually consist of one or more apparent " leaves " ( phylloclades ) containing air-filled cavities. They swim with it on the surface of bodies of water. Of these leaves each descends a root down into the water, can be added to the nutrient salts. It lacks an outline in stem and leaf.

In contrast to the other duckweed Lemna trisulca lives mostly submerged. This relates to the larger (3-15 mm long ), flat type axenic shoot limbs, which often cross with long stems related to several, are colored green and appear somewhat transparent. Only the smaller flowering shoot members who swim separately, purple crowded and are curved at the edges down, rise to the surface. The inconspicuous flowers are seated in marginal bags.

As for typical duckweed, Lemna trisulca also often forms convivial mass stocks in sunlit pools, ponds and ditches, especially in fen areas and flood plains. It is, however, less nitrogen- polluted waters as for example in the hunchback duckweed, which indicates strongly eutrophic water conditions. Accordingly Duckweed is not going anywhere and often may be absent in some regions. Typical accompanying species are inter alia frog bite and spring water. In the fall of stores starch, and then falls to the frost-free ground for overwintering.