[505] Acharius 1798, pp. 2, 87.

[506] Fries 1825.

[507] Hooker 1833.

[508] Taylor 1836.

[509] Rosendahl 1907.

[510] Bitter 1899.

[511] Nilson 1903.

[512] Kajanus (Nilson) 1911.

[513] Zopf 1903.

[514] Zopf 1905².