The Liverwort and Hornwort Flora of Jeju Island, Republic of Korea: A Volcanic Island with a Unique Mixture of Subtropical, Temperate, Boreal, and Arctomontane Taxa

Abstract

Jeju Island, due to its position at the southern tip of the Korean Peninsula in Northeast Asia, is a on the unique enclave of the many southern elements in the area and features a mixture of subtropical, temperate, boreal, and arctomontane taxa. Among the arctomontane species recorded in this study was Anthelia juratzkana; among the temperate species was Dactyloradula brunnea, and subtropical species were Cavicularia densa, Pallavicinia subciliata, Wiesnerella denudata, and Megaceros flagellaris. A valuable species as first recorded for the Jeju Island is Cryptocoleopsis imbricata. The distribution patterns of these species suggest that the flora of Jeju Island is a meeting place between boreal and subtropical floras. We recorded 222 taxa belonging to 45 families, 80 genera, 209 species, 9 subspecies, and 4 varieties. Among these, 86 species are reported as new to the flora of Jeju Island. A checklist based on a study of 1697 specimens is also provided.

Kahakuloa operculispora, a new Hawaiian simple thalloid liverwort in a new genus and family, Kahakuloaceae (Fossombroniales)

“…Miyake, found in eastern temperate and tropical Asia, and Papua New Guinea (Miyake 1899, Crandall-Stotler et al 2009. Morphological characters are taken from Miyake (1899), Schuster (1992), Crandall-Stotler et al (2009), and Choi et al (2023. Makinoa shares with the Hawaiian plant uniseriate ventral hairs tipped with slime papillae; colored rhizoids (although in Makinoa they are reddish-brown rather than reddish-purple); sunken antheridia (but in Makinoa they lack scales and are clustered and protected by a flap of thallus tissue, rather than scattered along the dorsal midrib and subtended by scales); and archegonia in small dorsal clusters protected by a well-developed involucre (but the involucre in Makinoa is only a flap).…”

Liverworts of Magadan: Life on the Edge of Beringia

“…Floral relationship analysis was carried out using detrended correspondence analysis (DCA), which is applicable for datasets of various sizes and has been tested by us several times for amphi-Pacific liverwort floras [26][27][28][29][30]. The material for the analysis was our compiled matrix (Supplementary Table S1) of the species composition of floras, which is a summary species distribution of the compared floras, where the presence of a species is marked with the number 1, and its absence with the number 0.…”