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Ferns and Horsetails (Monilophytes)
Clubmosses and Quillworts (Lycophytes)
Isoetes lacustris  •  Quillwort
Isoetes lacustris L.; Quillwort; Common Quillwort
Quillwort. Small plant washed up on lakeshore, Cumbria, June.
Small plant washed up on lakeshore, Cumbria, June Close-up. The cross-walls in the leaves are visible as lighter bands.
Section through quill  
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