Crustose lichen
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Crustose lichens are lichens that form a crust which strongly adheres to the substrate, making separation from the substrate impossible without destruction. The basic structure of crustose lichens con
Crustose lichens on a wall
Growth of crustose lichen on a tree trunk
Lepraria incana, a powdery lichen
Lecidea atrobrunnea, an endolithic lichen
Lichen growth forms
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Lichens are symbiotic colonies composed of multiple species: a fungus, one or more photobionts and sometimes a yeast. They are regularly grouped by their external appearance – a characteristic known a
Crustose (Lecidella elaeochroma)
Foliose (Flavoparmelia caperata)
Fruticose (Usnea filipendula)
Rhizocarpon species