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

Stems jointed, green, hollow, simple or branched at nodes; branches similar to stems but smaller. Leaves simple, very small, in whorls fused at their bases to form sheaths at nodes; sporangia in cones, which in some species are formed on tips of normal stems (occasionally on side branches), in others on separate unbranched non-green shoots, produced earlier in the season.

23 species, worldwide except for Australia and New Zealand; 8 species in Britain and Ireland; One species introduced (?) and naturalised although presumed to be formerly native.

* indicates introduced species.
Equisetum arvense Field Horsetail Equisetum arvense thumbnail, link to E. arvense page
Equisetum fluviatile Water horsetail Equisetum fluviatile thumbnail, link to E. fluviatile page
Equisetum hyemale Rough Horsetail Equisetum htemale thumbnail, link to E. hyemale page
Equisetum palustre Marsh Horsetail Equisetum palustre thumbnail, link to E. palustre page
Equisetum pratense Shade Horsetail Equisetum pratense thumbnail, link to E. pratense page
Equisetum ramosissimum* Boston Horsetail Equisetum ramosissimum thumbnail, link to E. ramosissimum page
Equisetum sylvaticum Wood Horsetail Equisetum sylvaticum thumbnail, link to E. sylvaticum page
Equisetum telmateia Great Horsetail Equisetum telmateia thumbnail, link to E. telmateia page
Equisetum variegatum Variegated Horsetail Equisetum variegatum thumbnail, link to E. variegatum page
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