Ornithopus perpusillus has been reported for the first time from Lithuania in 1898 when the only site has been indicated at Klaipėda harbour. In 1998, the species was found in the Curonian Spit near Nida. Ecological conditions, structure of the community, characteristics of the hebitat are overviewed, and the distribution is discussed in the paper. It is supposed that Ornithopus perpusillus is naturally distributed in the Curonian Spit and that the locality appears to be situated apart to the east from the main distribution area.
Keywords: Ornithopus perpusillus, biology, distribution, community, Curonian Spit, Lithuania.