Calamitaceae is an extinct family of plants related to the modern horsetail. Some members of this family attained tree-like stature during the Carboniferous Period. The family takes its name from its principal genusCalamites. Scientific classification or biological classification refers to how biologists group and categorize extinct and living species of organisms. ... Species Subgenus Equisetum Equisetum arvense - Field or Common Horsetail Equisetum bogotense - Andean Horsetail Equisetum diffusum - Himalayan Horsetail Equisetum fluviatile - Water Horsetail Equisetum palustre - Marsh Horsetail Equisetum pratense - Shade Horsetail Equisetum sylvaticum - Wood Horsetail Equisetum telmateia - Great Horsetail Subgenus Hippochaete Equisetum giganteum - Giant Horsetail Equisetum myriochaetum - Mexican Giant Horsetail Equisetum hyemale... The Carboniferous is a major division of the geologic timescale that extends from the end of the Devonian period, about 340 million years ago (mya), to the beginning of the Permian period, about 280 mya. ... See genus (mathematics) for the use of the term in mathematics. ... Species See text Calamites is a genus of extinct arborescent (tree-like) horsetails to which the modern horsetails (genus Equisetum) are closely related. ...
Because some proposed species are based on partial fossil records, it is not clear if these are merely different parts of the same type. A fossil Ammonite Fossils are the mineralized remains of animals or plants or other traces such as footprints. ...
The superficially similar flowering plant Mare's tail (Hippuris vulgaris), unrelated to the genus Equisetum, is occasionally mis-identified and mis-named as a horsetail.
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