Subdivision Sphenopsida


Equisetaceae Horsetail Family


Equisetum
 E. hyemale L.
 E. praealtum


Horsetails
 Scouring-rush


 Subdivision Pteropsida


 Class Filicinae


Ophioglossaceae Adder's-tongue Family


Botrychium
 B. alabamense Maxon
 B. biternatum (Say.) Underw.
 B. obliquum
 B. lunarioides (Michx.) Sw.
 B. biternatum
 B. virginianum (L.) Sw.
 Osmundopteris virginiana

Ophioglossum
 0. crotalophoroides Walt.

 0. engelmannii Prantl


Grape Ferns

 Grape Fern



 Rattlesnake Fern


Adder's-tongues
 Bulbous Adder's-
 tongue
 Engelmann's
 Adder's-tongue


0. nudicaule L. f.
 0. dendroneuron, 0. mononeuron, 0. Pumilio, 0. tenerum
0. palmatum L. Hand Fern
 Cheiroglossa palmata
0. petiolatum Hook.
 0. floridanum


 Osmundaceae Royal Fern Family


Osmunda
 0. cinnamomea L.
 0. regalis L.


Cinnamon Fern
Royal Fern