Calamites
| Calamites Temporal range: | |
|---|---|
| A range of Calamites specimens, illustrating the different appearance of fossils preserved under different taphonomic modes | |
| Scientific classification | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Division: | Polypodiophyta |
| Class: | Polypodiopsida |
| Subclass: | Equisetidae |
| Order: | Equisetales |
| Family: | †Calamitaceae |
| Genus: | †Calamites |
| Species | |
|
Calamites carinatus | |
Calamites is a genus of extinct arborescent (tree-like) horsetails to which the modern horsetails (genus Equisetum) are closely related. Unlike their herbaceous modern cousins, these plants were medium-sized trees, growing to heights of 30–50 meters (100–160 feet). They were components of the understories of coal swamps of the Carboniferous Period (around 360 to 300 million years ago).
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