Lichen: Two Living Things In One

Join Jessi this week at the fort and learn about the unexpectedly awesome organism that's made up of two living things: LICHEN!
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SOURCES:
http://www.fs.fed.us/wildflowers/beauty/lichens/
http://www.nhm.ac.uk/nature-online/life/plants-fungi/lichens/

Photos for reference:
http://www.fs.fed.us/wildflowers/beauty/lichens/gallery/index.shtml
http://www.fs.fed.us/wildflowers/beauty/lichens/biology/growthforms.shtml
https://commons.wikimedia.org/wiki/File:L%C3%ADquens_en_pedra90.JPG
https://commons.wikimedia.org/wiki/File:Rock_and_lichen.jpg
https://commons.wikimedia.org/wiki/File:Lichen_encrusted_rocks_adorn_the_cliffs_of_Santa_Cruz_Island.jpg
https://commons.wikimedia.org/wiki/File:Orange_lichen_(Xanthoria_parietina)_on_concrete.jpg