[475] Bitter 1904.
[476] Linkola 1913.
[477] Acharius, 1798, p. xix, and 1810, pp. 8 and 10.
[478] Malpighi, 1686, p. 50, pl. 27, fig. 106.
[479] Micheli 1729, pp. 73, 74.
[480] Linnaeus 1737, p. 325.
[481] Hedwig 1798.
[482] Sprengel 1807, Letter XXIII.
[483] Wallroth 1825, I. p. 595.
[484] Koerber 1841.