Pachyphragma and Gagria (Brassicaceae) revisited: Molecular data indicate close relationship to Thlaspi s. str.

The systematic position of Pachyphragma macrophyllum (Brassicaceae) is unse ttled. This species was either treated as a monotypic section of Thlaspi s. l. or was treated as a distinct genus. Gagria lobata apparently closely rel ated to Pachyphragma, was also given generic rank. To unravel the phylogene tic relationships of Pachyphragma and Gagria, ITS sequence studies were con ducted using as a reference representatives of the main lineages of Thlaspi s.l. The molecular data indicate that Gagria lobata and Pachyphragma macro phyllum are closely related to members of Thlaspi s.str., an assemblage of species well separated from the other Thlaspi s.l. lineages.