Cryptogamae Exsiccatae editae a Museo Palatino Vindobonensi [3201-4700]
Abbreviation: Petrak, Crypt. Exs.
Editor(s): F. Petrak
Range: 3201- 4700
Notes: Centuries XXXIII-XLVII ; Usually cited as "Anonymous"; author changes are given according Pfister (1985). There are several numbers used again for issuing the same species in later times without any note on the labels.