22 July 2012

A new duckweed in Wales?

Lemna valdiviana
The article on duckweeds in the June volume of British Wildlife prompted a closer inspection of the duckweeds at the National Wetland Centre at Llanelli last week and plants fitting the characters of Lemna valdiviana were found along with the more abundant Least Duckweed (L. minuta) and locally frequent Common Duckweed (L. minor), Ivy-leaved Duckweed (L. trisulca) and Greater Duckweed (Spirodela polyrhiza). Although this is the first time L. valdiviana has been recorded in Carmarthenshire, and possibly Wales, it seems likely it has been overlooked and is worth searching for elsewhere.
Lemna valdiviana alongside greener L. minuta
[NB specimens sent to NHM have now been identified as just being L. minor]

No comments: