There's Something About Lichens
A lichen is a composite organism that emerges from algae or cyanobacteria (or both) living among filaments of a fungus in a mutually beneficial (symbiotic) relationship. The whole combined life form has properties that are very different from properties of its component organisms. Lichens come in many colors, sizes, and forms. The properties are sometimes plant-like, but lichens are not plants. Lichens may grow like a tiny, leafless, branching shrub (fruticose), like it has leaves (foliose), like a crust of paint on a surface (crustose), or have other growth forms. A macrolichen is a lichen that is either bush-like or leafy; a microlichen is everything else.
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