Thanks Eric.

There doesn't seem to be any negative reports. When you look up "duckweed" or "water meal", your search will always turn up a lot of R-rated expletives. So far in all my searching, I haven't uncovered a single negative remark on purple fringed riccia. it seems to be either scarce or innocuous. In fact, I rather like what I have seen of it.

Some area ponds have riccia, so I know it's just a matter of time until the Great Bird brings the spores down on me.

Shrimp