Calamites cistiiformes

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Calamites cistiiformes (horse-tails; family Calamitaceae) A species of jointed-stemmed plants that were an important component of Carboniferous swampland floras. Unlike their small modern counterparts some Carboniferous species grew to 18 m tall. Calamites cistiiformes was the earliest representative of the Calamitaceae and was first described in 1877. Calamatids are known throughout the northern hemisphere.

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