Equisetopsida

Carboniferous Calamites, Illustration

Fossil Sphenophyllum

Fossil leaves of Calamites

Equisetum fluviatile, water horsetail

Asterophyllites grandis, giant horsetail leaves

Calamites sp. giant horsetail trunk

Fossil branches of Calamites

Calamites suckowi (Brongniart)

Calamites sp. cast of trunk

Annularia sphenophylloid, fossil horsetail