[545] Wainio 1890.
[546] Tulasne 1852.
[547] Fuisting 1868.
[548] Stahl 1877.
[549] Borzi 1878.
[550] Baur 1898.
[551] Fünfstück (1902) suggests that the lichen worked at by Baur is Collema cheileum Ach.
[552] Krabbe 1883.
[553] Mäule 1891.
[554] F. Bachmann 1912.