The correct identification of unknown specimen is very important in scientific research, for which taxonomic keys are used. Until now, there was no key written in Croatian language that would include all 23 species of the genus Rumex L. recorded in the Croatian flora. The objective of this paper is the creation of multi-access key in tabular format, equipped with photographs to help define character states, which would then serve to identify and describe the species of the genus Rumex L., to the level of subspecies. In this paper, 962 dried plant specimen of the genus Rumex L. were analyzed, and the literature on gender was thoroughly studied. A series of tables was made, displaying the usability of 15 pre-selected diagnostic characters on dried plant specimens. By comparing dried plant specimens and literature data, 13 diagnostic characters were defined. Photo-documentation of character states was made, using dried plant specimens. Tabular multi-access key was created, which can now be used to identify and describe the species of the genus Rumex L. in the Croatian flora, and also allows for future digitization and incorporation of new data.