The original report was written by E Norman and appeared in the Spring 1994 magazine Number 429 on page 12. Click here to read the original report.
| Calystegia sepium | Hedge Bindweed. |
| Calystegia silvatica | Large Bindweed |
| Lemna minuta | Least Duckweed |
| Sparganium emersum | Unbranched Bur-reed |
| Spirodela polyrhiza | Greater Duckweed |