Abstract
Lycopus charkeviczii Prob. (Lamiaceae Martinov) is found in all provinces of the Korean Peninsula, excluding Jeju-do. This species is closely related to L. lucidus Turcz. ex Benth., having such characters as persistent calyx of which the length is longer than the nutlets, and narrowly lanceolate to oblong-lanceolate leaves. However, it is distinguished from L. lucidus by its parted calyx and its smooth or rarely glandular nutlets with an irregularly toothed apex. This taxon was named 'San-swip-ssa-ri' in Korean based on its habitat. We provide a description, illustrations, photographs, and a key of related taxa in Korea.
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