L9-1: Gillespiea randolphensis from Randolph County, W. Virginia. Age Famennian.

L9-2: Peel of Stauropteris

L9-3: Megasporangium l.s. of Stauropteris burntislandica from Pettycure, England. Age Mississippian.

L9-4: Peel of cross section of Zygopteris ilinoiense from Berryville. Age Upper Pennsylvanian.

L9-5: Peel of Elapteris scotti X.S. from Lewis Creek, Kentucky. Age M. Pennsylvanian.

L9-6: Peel of Etapteris leclerqii from Lewis Creek, Kentucky.

L9-7: Peel of Etapteris x.s. petiole from Sahara #6 Mine, Illinois. Age L. Pennsylvanian.

L9-9: Biscalitheca (fertile-sporangia) from Berryville. Age Pennsylvanian.

L9-13: Rhacophyton, Zygopterid fern. Age Devonian.

L9-15: Rhacophyton, Zygopterid fern. Age Devonian.

L9-16: Rhacophyton, Zygopterid fern. Age Devonian.

L9-19: Metaclepsydropsis duplex is a Mississippian species with horizontal rhizome.

L9-20: Metaclepsydropsis duplex is a Mississippian species with horizontal rhizome.

L10-1: Peel of cross section of base of Psaronius blickei from Berryville, Illinois. Age U. Pennsylvanian.

L10-2: Psaronius melanedrus x.s. from West Mineral. Age m. Pennsylvanian. Showing stem with adventitious root mantle.

L10-4: Coal ball with Psaronius melanedrus from Illinois. Age U. Pennsylvanian.

L10-4: Peel of coal ball with Psaronius melanedrus from Illinois. Age U. Pennsylvanian.

L10-5: Coal ball of Psaronius blicklei from Berryville, Illinnois. Age U. Pennsylcanian. Permineralized.

L10-5: Peel of coal ball of Psaronius blicklei from Berryville, Illinnois. Age U. Pennsylcanian. Permineralized.

L10-6: Cross section of Psaronius roots of root mantle.

L10-8: Psaronius stem x.s.

L10-8: Peel of Psaronius stem.

L10-8: Peel of Psaronius stem.

L10-9: Peel of Psaronius stem x.s.

L10-11: Peel of Psaronius stem x.s. from Shade Creek, Ohio. Age Pennsylvanian.

L10-12: Peel of Psaronius blickei x.s. from Berryville, Illinois. U. Pennsylvanian.

L10-14: Peel of Psaronius roots x.s. from Harrisburge, Illinois.

L10-15: Peel of Psaronius root (cut)

Permineralized root of Psaronius.

L10-16: Peel of Stipitopteris from Berryville. Illinois. Age U. Pennsylvanina.

 L10-17: Peel of Psaronius melanedrus from Sahara, Illinois. M.Pennsylvanian.

L10-18: Pecopteris from Mazon creek, Illinois. Age Pennsylvanian.

L10-19: Pecopteris from Mazon Creek, Illinois. Age Pennsylvanian.

L10-20: Pecopteris from Mazon Creek, Illinois. Age Pennsylvanian.

L10-23: Pecopteris arborescens from Mason Creek, Illinois. U. Pennsylvanian.

L10-26: Pecopteris unitus

L10-27: Pecopteris with lobed pinnule from Knoxville, Tennesee

L10-30: Pecopteris a fertile specimen.

L10-31: Peel of Scolecopteris x.s. of synangia.

L10-34: Botrychium wightonii from Genesee, AB. Scollard Fm. L. Paleocene.

Extant fern leaf with synangia along the edge of the leaf.