Another item I press throughout the year are lichen. Lichen grow on the bark of dead and decaying trees. They are varied in color and markings and press well in heavy books. They will leave deep indentations within the book, so be sure it is one you don’t mind losing for pressing. I also have used heated books to press the lichen, but don’t necessarily enjoy the smell that ensues from the microwave when I open the door. The lichens will retain a bit of thickness, so they are not necessarily good for greeting cards, but they can be used to make fairy furniture and other natural arrangements.
A good site to visit for more information of lichens can be found here: Lichens. Happy Pressing!