2025 04 04
Https www alamy com paleozoic calamites including a root at right illustration from 1872 a calamite is any member of the lineage of giant horsetails which belonged to the sphenopsida an important part of late paleozoic vegetation calamites grew to be tree sized plants with but with whorled branches seen in modern horsetails a calamite root can be seen at right the paleozoic era is the earliest of three geologic eras of the phanerozoic eon spanning from roughly 541 to 25217 million years ago image352826559 html (Typ súboru jpg)
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