[Botany • 2022] Mosla dadoensis (Lamiaceae) • A New Species from the southern Islands of South Korea

 

 Mosla dadoensis K.K.Jeong, M.J.Nam & H.J.Choi, 

in Jang, Jeong, Nam, ... et Choi, 2022.  

다도해산들깨  ||  DOI: 10.3897/phytokeys.208.89552

Abstract

Mosla dadoensis (Lamiaceae), a new species from the southern islands of South Korea, is described and illustrated. The new species is morphologically similar to M. chinensis, but is distinguished from the latter by having two types of hairs on its stems, wider leaf blades, longer corolla length, and ellipsoid nutlets with a narrowly U-shaped extended area of abscission scar. Mosla dadoensis is also distinguished from the Chinese narrow endemic M. hangchouensis by having an included pistil to the corolla, smaller ellipsoid nutlets, and later flowering and fruiting season. Phylogenetic analyses, based on two nuclear ribosomal (ETS, ITS) and three chloroplast (rbcL, matK, trnL-F) DNA regions, confirmed that the new species was constructed as monophyletic, and that M. dadoensis and M. hangchouensis form a sister group with robust support. We hereby provide a detailed morphological description of M. dadoensis with its corresponding geographical distributions, and comparison tables of related taxa.

Keywords: Elsholtzieae, Korean endemic plant, morphology, phylogeny, taxonomy

Photograph of the holotype of  Mosla dadoensis.

 Mosla dadoensis K.K.Jeong, M.J.Nam & H.J.Choi, 
 A habit B raceme C stem D, E leaf (D adaxial E abaxial) F flower G, H corolla (S stamen P pistil) I calyx J seed.

Photos from H.J.Choi 210923-001 (A–H) and H.J.Choi 211025-001 (I, J).

 Mosla dadoensis K.K.Jeong, M.J.Nam & H.J.Choi, sp. nov.

 

Diagnosis: This new species is morphologically similar to M. chinensis, but is easily distinguished from the latter by having two types of hairs on its stems, wider leaf blades, longer corolla length, and ellipsoid nutlets with a narrowly U-shaped extended area of abscission scar.

Etymology: The specific epithet, “dadoensis”, is based on the name of location, the Dadohae southern coastal region of Korea, where Mosla dadoensis was discovered.

Vernacular name: The Korean name of the new species is “Da-do-hae-san-deul-kkae (다도해산들깨)”.

 Hyun-Do Jang, Kwi-Kwan Jeong, Myoung-Ja Nam, Jun-Ho Song, Hye-Kyoung Moon and Hyeok Jae Choi. 2022. Mosla dadoensis (Lamiaceae), A New Species from the southern islands of South Korea. PhytoKeys. 208: 185-199. DOI: 10.3897/phytokeys.208.89552