Query: Plants from Mississippi or Pennsylvania
Domain: plants
Relevant documents:
Stamnostoma
Walchia
Medullosales
Sphenopteris
Hamatophyton
Lyginopteris
Sigillaria
Cordaites
Sphenophyllales
Macroneuropteris
Neuropteris
Lepidodendron
Lagenostoma
Psaronius
Noeggerathia
Moresnetiaceae
Hamatophyton verticillatum
Progymnosperm
Metzgeriothallus