Calamites are a type of horsetail plant that lived in the coal swamps of the Carboniferous Period. They were prehistoric relatives of the modern horse tail, but looked more like a pine tree and grew up to 40 to 100 feet.
Crédito: Album / Stocktrek Images / Corey Ford
Tamaño imagen: 4260 × 4260 px | 51.9 MB
Tamaño impresión: 36.1 × 36.1 cm | 1677.2 × 1677.2 in (300 dpi)