RT Generic T1 Sierra Nevada (Spain), the southernmost European locality for the polar-alpine Umbilicaria aprina and U. virginis. A1 Aramburu, Ana A1 Casares, Manuel A1 García Sancho, Leopoldo A1 Pintado Valverde, Ana A1 Raggio Quílez, José A1 Sánchez Pescador, David AB Two strict polar-alpine Umbilicaria species (U. aprina and U. virginis) are reported growing together in Los Peñones de San Francisco. Other localities known on the highest summits of the Alps and Pyrenees are considered. We discussed the meaning of these isolated populations as glacial relicts. PB Ediciones Complutense SN 2603-9109 YR 2022 FD 2022 LK https://hdl.handle.net/20.500.14352/132854 UL https://hdl.handle.net/20.500.14352/132854 LA eng NO CITACIÓN RECOMENDADA: Sancho, L.G., Aramburu, A., Pintado, A., Casares, M., Raggio, J. & Sánchez-Pescador, D. 2022. Sierra Nevada (Spain), the southernmost European locality for the polar-alpine Umbilicaria aprina and U. virginis. Mediterr. Bot. 43, e77925. https://doi.org/10.5209/mbot.77925 DS Docta Complutense RD 26 feb 2026