The Duckweed Clearinghouse is a project of PRISM-USA.
Its purpose is to provide a
single, comprehensive source of information on the duckweeds (Lemnaceae). In particular, it is
intended to provide practical knowledge about the cultivation of this under-utilized family of
plants and their use both as animal feed and as a natural wastewater treatment technology.
As of September 30, 1997, the DCH offers the following kinds of information: