A revision of Australian Trachymene (Apiaceae: Hydrocotyloideae)

The current use of the name Trachymene Rudge was determined in the 1930s. However a comprehensive synonymy for the numerous published names in Trachymene has not previously been compiled. All Australian species of Trachymene are treated. A nomen novum, Trachymene leptophylla J. M. Hart, is provided for the illegitimate Trachymene. filiformis Steenis. In addition, two new Australian species, Trachymene umbratica J. M. Hart and Trachymene thysanocarpa J. M. Hart, are described. A new combination: Trachymene composita var. robertsonii (Domin) J. M. Hart is made and range extensions for Trachymene oleracea subsp. sedimenta Rye, Trachymene bialata (Domin) B. L. Burtt and Trachymene rotundifolia (Benth.) Maconochie are recorded. Seven lectotypes are designated. Distribution maps and a key to all Australian species of Trachymene are provided.