Collema conglomeratum Hoffm. 1796
| Lichen Mapping in Europe. Proceedings of the First Meeting on Lichen Mapping in Europe held at Stuttgart from September, 22nd to 24th, 1989 V Wirth and H (Eds ) Oberhollenzer (1990) Stuttgarter Beiträge zur Naturkunde Serie A (Biologie) 456: 1-199 |