Water Fern

Water Fern covering a rhyne, Somerset Levels

Closer view

Fronds

Closer view of fronds

Close-up of frond with overlapping leaves

Rootlets

Large fern cells and chains of Anabaena cells
(the larger oval cells are heterocysts and the
smaller squarer ones are vegetative)

Chains of Anabaena cells and a large fern
transfer cell

Water Fern and Common Duckweed on the
Lancaster Canal