''Hamatophyton'' is a genus of the extinct

Sphenophyllales 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 ...

horsetails. Unique to this genus among other Sphenophyllales is its lack of secondary xylem around the tips of the primary xylem arms.Thomas N. Taylor, Edith L. Taylor, Michael Krings: Paleobotany. The Biology and Evolution of Fossil Plants . Second Edition, Academic Press 2009, , p. 333

References

Horsetails Late Devonian plants Mississippian plants Prehistoric plant genera Late Devonian first appearances Mississippian extinctions Famennian life Tournaisian life Famennian genus first appearances {{carboniferous-plant-stub