Opegrapha Ach.
Fungi | Ascomycota | Arthoniomycetes | Arthoniales | Opegraphaceae | Opegrapha
semi-exposed bark (lower stem)
Palo Verde National Park (Tempisque Conservation Area), Palo Verde Station: 130 km WNW of San José and 30 km SSW of Bagaces, trail W of station parallel to Río Tempisque