Calypogeia azurea Stotler et Crotz, Taxon 32 (1): 74. 1983.

Bakalin, Vadim A., Klimova, Ksenia G. & Nguyen, Van Sinh, 2020, A review of Calypogeia (Marchantiophyta) in the eastern Sino-Himalaya and Meta-Himalaya based mostly on types, PhytoKeys 153, pp. 111-154 : 111

Calypogeia azurea Stotler et Crotz, Taxon 32 (1): 74. 1983.

Type.

Not seen.

Remarks.

There are several records of this taxon in East and Southeast Asia. Singh and Nath (2007a) recorded it for the East Khasi Hills; Shu et al. (2017) reported it for northern Vietnam; Wang et al. (2011) mentioned it for Taiwan based on two records of ' Calypogeia trichomanis '. Zhu and So (2003) recorded taxon for Guangxi Province. As shown by Buczkowska et al. (2018), the traditionally named C. azurea should be subdivided into at least three main lineages: ‘true’ C. azurea in Europe, a North American semicryptic and still validly not described taxon, and the taxon morphologically similar to European C. azurea but distributed in East Asia that was described as C. orientalis in l.c. Geography-correlated infraspecific variability was also observed within C. orientalis ; two subspecies may be maintained, both of which are distributed in temperate zone, with one restricted to continental mainland (Korean Peninsula, Russian Manchuria) and the other occurring in Japan. The occurrence of C. orientalis was not confirmed in China, although it is highly probable in the northeastern part of the country. Due to data in hand, C. orientalis is only known from Russian Manchuria, Sakhalin and Kuril Islands, Japan and the Korean Peninsula, being most common between 35 and 45°N (in cool temperate to hemiboreal zones). Thus, some records of Calypogeia azurea in Northeast China may actually belong to C. orientalis , but specimens from the Sino-Himalaya could hardly belong to this species. Another recently described taxon, C. sinensis , with exceedingly deep blue oil bodies (described based on material from northern Vietnam and Guizhou Province in China, where both specimens were preliminarily named C. azurea ) may be the taxon previously misidentified as C. azurea in the aforementioned works. Bapna and Kachroo (2000) reported occurrences of C. trichomanis in Darjeeling and Nepal; what these reports mean is difficult to say, but some of them probably also belong to C. sinensis .