Sphenophyllales
![A piece of rock showing imprints of about four slender vine-like stems with small wedged-shaped leaves arranged around regularly spaced nodes.](/Images/godic/202502/12/Sphenophyllum_miravallis3315.jpg")
Sphenophyllales is an extinct order of articulate land plants and a sister group to the present-day Equisetales (horsetails). They are fossils dating from the Devonian to the Triassic. They were common during the Late Pennsylvanian to Early Permian, with most of the fossils coming from the Carboniferous period.