San Diego Natural History Museum
San Diego Natural History Museum: Fossil Field Guide: Cycads
A look at what fossil evidence reveals about the life and ecological interactions of the extinct cycad plant.
Smithsonian Institution
National Museum of Natural History: Paleobiology: Green River Fossil Collections
Search the collection of 35,000 fossiliferous rocks found within the Green River Formation of Colorado and Utah. View some of these 50 million year old insect fossils in a linked slide show.
Smithsonian Institution
National Museum of Natural History: Paleobiology: Green River Insects
Interactive photo search of the collection of 35,000 fossiliferous rocks found within the Green River Formation of Colorado and Utah.
Other
Hans' Paleobotany Pages
A good site discussing the history of fossil plants, including oldest land plants and links to related topics.
Other
Plant Fossils of West Virginia
Has great diagrams of plant fossils as well as some general information on prehistoric plants.
Other
Louisiana Petrified Wood
A detailed article about the petrified wood which is found in Louisiana.
Other
Fossil Fun: Plant Fossils
A brief site that explains how plant fossils let us know what the weather and temperature was long ago. Text is supplemented with photographs.