Lycopodiaceae
Diphasiastrum, Huperzia, Lycopodiella, Lycopodium, Palhinhaea, Phlegmariurus, Botanical Dermatology Database - Lycopodiaceae, Flora of the Carolinas and Virginia: Lycopodiacea, Genus List, Lycopodiaceae, Lycopodiaceae Images
The Clade Lycopsida
diverged in the Early Devonian...