Kryptogamae Exsiccatae editae a Museo Palatino Vindobonensi [2601-3200]
Abbreviation: Keissler, Krypt. Exs.
Editor(s): K. von Keissler
Range: 2601 - 3200
Notes: Centuries XXVII-XXXII ; Usually cited as "Anonymous"; author changes given according Pfister (1985). For more detailed information see Stevenson (1971) p. 239. There are several numbers used again for issuing the same species in later times without any note on the labels.