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41 rocktripes, toadskin lichens, and allies species
Umbilicaria mammulata
Lasallia papulosa
Umbilicaria muhlenbergii
Umbilicaria americana
Umbilicaria deusta
Umbilicaria hyperborea
Umbilicaria cylindrica
Umbilicaria phaea
Umbilicaria polyphylla
Lasallia pensylvanica
Xylopsora friesii
Umbilicaria torrefacta
Umbilicaria angulata
Umbilicaria proboscidea
Umbilicaria hirsuta
Umbilicaria vellea
Umbilicaria virginis
Umbilicaria polyrrhiza
Umbilicaria decussata
Umbilicaria arctica
Umbilicaria rigida
Umbilicaria krascheninnikovii
Umbilicaria lyngei
Lasallia caroliniana
Umbilicaria scholanderi
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