Hitherto overlooked or a recent introduction? (Re)discovery of Ornithopus perpusillus in Hungary

This article presents the hitherto known records of Ornithopus perpusillus in Hungary. The species was first found in central Hungary as early as 1952, but was identified as O. sativus. It was (re-)discovered in southwestern Hungary in 2010 at several localities, in disturbed, open sandy grasslands, with co-occurrence of other Atlantic-Mediterranean species. O. perpusillus was likely introduced in Hungary at the beginning of 2000s, and now it is considered to be naturalized here.