Fossil Flower
Barbara Strnadova
Fern Fossil
Theodore Clutter
Annularia Plant Fossil
Millard H. Sharp
Fossil Seed Fern Leaf #1
Louise K. Broman
Fossil Seed Fern #1
Louise K. Broman
Fossil Seed Fern
Louise K. Broman
Annularia Fossil #1
Louise K. Broman
Fossil Plant
Stuart Wilson
Fossil Plant With Seeds
James L. Amos
Fossil Tree Bark
Louise K. Broman
Fossil Sassafras Leaf
Louise K. Broman
Fossil Leaf
Stuart Wilson
Annularia Fossil
James L. Amos
Fern Fossil
Andrew J. Martinez
Sequoia Fossil
Louise K. Broman
Neuropteris And Alethopteris
Theodore Clutter
Fossilized Fern
Scott Camazine
Fossilized Fern
Ted Kinsman
Annularia Fossil
Louise K. Broman
Paleozoic Flora, Calamites, Illustration
British Library
Prehistoric Flora, Carboniferous
British Library
Fossil Fern
Theodore Clutter
Fossil Plant Leaves
Louise K. Broman
Fossil Horsetail Leaves
Louise K. Broman
Fossil Fern Leaf
Louise K. Broman
Fossil Seed Fern Leaf
Louise K. Broman
Fossil Maple Leaf
Theodore Clutter
Fossil Poplar Leaf
Theodore Clutter
Fossil Heather Flowers
Theodore Clutter
Fossil Beech Leaf
Theodore Clutter
Fossil Sweetgum Leaf
Theodore Clutter
Fossil Leaf Scars
Louise K. Broman
Fossil Lizard And Leaf
James L. Amos
Fossil Root
Louise K. Broman
Fossil Leaf Whorl
Louise K. Broman
Alethopteris Fossils
James L. Amos
Annularia Fossil
Theodore Clutter
Asterotheca Fossil
Louise K. Broman
Conifer Fossil #1
James L. Amos
Conifer Fossil
James L. Amos
Alethopteris Fossil
Louise K. Broman
Fern Leaf Fossil
Millard H. Sharp
Leaf Fossil
Millard H. Sharp
Leaf Fossil #1
Millard H. Sharp
Leaf Fossil #2
Millard H. Sharp
Silurian Plants
Science Source
Petrified Wood
Barbara Strnadova
Agate House
Kenneth Murray
Petrified Wood
A.b. Joyce
Petrified Forest National Park
E.r. Degginger
Petrified Wood In South Africa
Carleton Ray
Petrified Wood
Charlie Ott
Leaves And Branches
James L. Amos
Welwitschia Mirabilis In The Namib #1
Francesco Tomasinelli
Leaf Fossil #3
Millard H. Sharp
Leaf Fossil #4
Millard H. Sharp
Magnolia Fruit Body And Fossil
Theodore Clutter
Palm Tree Frond Fossil
Millard H. Sharp
Pine Fossil
Michael Abbey
Neuropteris Fossil #1
Theodore Clutter
Natural Gas Processing Plant
Inga Spence
Homer City Coal-fired Power Plant
Theodore Clutter
Tasmanite, Fossilized Plant Spores, Lm
Michael Abbey
Male Catkin Of Cordaites Tree
Louise K. Broman
Fossil Plant Spores, Dic
Michael Abbey
Fossil Maple Leaf With Knightia Fish
Jeffrey Lepore
Plant Spores, Dark Field Microscopy
Michael Abbey
Plant Spores, Dark Field Microscopy #1
Michael Abbey
Plant Spores, Dark Field Microscopy #2
Michael Abbey
Plant Spores, Dark Field Microscopy #3
Michael Abbey
Fossil Palm, Close-up #3
Mark Windom