Abstract
The duckweed species, Landoltia punctata (G. Meyer) D. H. Les & D. J. Crawford (family, Araceae; subfamily, Lemnoideae; common name, dotted duckmeat) was found in artificial wetlands in Jeju Special Self-Governing Province, Republic of Korea; however, it has no formal record in Korea. We identified this species based on morphological characteristics and DNA sequences. We also checked Lemnoideae specimens in the Korean and Japanese herbaria but found no specimens of La. punctata collected in Korea previously. The chloroplast DNA sequence (atpF-atpH) of the species collected from Jejudo was identical to the other La. punctata sequences in the DNA Data Bank of Japan (DDBJ)/The European Molecular Biology Laboratory (EMBL)/GenBank. Their habitat environments and our herbarium research suggest that this species has recently become distributed in Korea. This study also provides a key to closely related taxa in the subfamily Lemnoideae, with descriptions of these species.
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