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Ferns and Horsetails (Monilophytes)
Clubmosses and Quillworts (Lycophytes)

Small, aquatic ferns. Rhizome slender, creeping; leaves borne singly at nodes; leaves slender, grass-like; tip coiled when young; sporangia in stalked globular structures (sporocarps) at the base of leaves.

Five species, worldwide. One species in Britain and Ireland.
Pilularia globulifera Pillwort Pilularia globulifera thumbnail, link to P. globulifera page
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