[595] Brongniart (49), p. 49.
[596] E.g. Isoetes, Botrychium, &c.
[597] Mougeot (52).
[598] Göppert (64), p. 183.
[599] ἄρθρον, joint; πίτυς, Pine-tree.
[600] The original specimens described by Göppert are in the rich palaeobotanical Collection of the Breslau Museum.
[601] Williamson (713), p. 174.
[602] vide Solms-Laubach (96).
[603] Letter, November 1897.
[604] Vide p. 310.