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3,591 common lichens species
Thelotrema petractoides
Tornabea scutellifera
Trapelia stipitata
Tricharia cuneata
Tricharia tuckerae
Tricharia vainioi
Trimmatothelopsis americana
Trimmatothelopsis terricola
Tuckermanella coralligera
Tuckermanella weberi
Umbilicaria semitensis
Usnea brattiae
Usnea entoviolata
Variospora aurantia
Trichothelium americanum
Wetmoreana texana
Xanthocarpia lactea
Xanthocarpia tominii
Xanthomendoza borealis
Xanthoparmelia ahtii
Xanthoparmelia atticoides
Xanthoparmelia brunella
Xanthoparmelia chiricahuensis
Xanthoparmelia isidiosa
Xanthoparmelia knudsenii
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