Myelochroa galbina (Ach.) Elix & Hale,

Moon, Kwang Hee, Ahn, Chorong & Kashiwadani, Hiroyuki, 2015, Revision of the lichen genus Myelochroa (Ascomycotina: Parmeliaceae) in Korea, Journal of Species Research 4 (1), pp. 23-32 : 25-26

Myelochroa galbina (Ach.) Elix & Hale,

Mycotaxon 29: 240, 1987.

Basinonym: Parmelia galbina Ach., Syn. meth. lich.: 195, 1814. Type collection: North America (Pennsylvania?), Muhlenberg (lectotype in H, Acharius Herb.!).

For other synonyms, see Hale (1976) and Kurokawa and Arakawa (1997).

Chemistry. Atranorin, galbinic acid, zeorin, leucotylin and its derivatives, salazinic acid and secalonic acid A.

Myelochroa galbina is easily distinguished from other species of the genus by the thallus without asexual propagules, the P+ reaction of the medulla, the presence of galbinic acid and the formation of moniliform cells in the medulla.

Hale (1976) reported the occurrence of leucotylin in this species. Kurokawa and Arakawa (1997) found irregular occurrence of this substance for Japanese specimens; instead of leucotylin, they demonstrated leucotylic acid in 11 of 20 Japanese specimens. In contrast, Korean material always produces leucotylin.

In Korea, M. galbina has been reported as Parmelia galbina ( Lee, 1987) or M. galbina ( Park, 1990; Moon, 1999; Kashiwadani et al., 2002; Jayalal et al., 2012).

Myelochroa galbina has a disjunctive distribution in eastern Asia and eastern North America ( Kurokawa, 1972; Moon, 1999). In Asia, it has been reported from southern China, Taiwan and Nepal ( Kurokawa and Arakawa, 1997).

Myelochroa galbina seems to be rather rare in Korea, where it has been collected in Gangwon ( Moon, 1999) and Jeju ( Kashiwadani et al., 2002) provinces and on Mt. Jiri ( Lee, 1987; Jayalal et al., 2012).

Specimens examined. Prov. Gangwon (=Prov. Kangwon), Inje-gun, Mt. Sorak, Paektam temple area, on bark along stream, elevation about 420 m, October 6, 1995, K.H. Moon 390 & H. Kashiwadani (TNS); Inje-gun, Mt. Sorak, Paektam temple area, on bark along stream, elevation about 430 m, October 21, 2006, K.H. Moon 9156 (NIBR). Prov. Jeju (=Prov. Cheju) Mt. Halla, en route from Witsae Oreum Shelter to Eorimok, on bark of Carpinus sp. , elevation about 1000 m, May 24, 2001, K.H. Moon 5823 (TNS); Namcheju-gun, Namwon-up, Mt. Halla, along trail of Songpanak route to the summit, on decayed wood, elevation about 900 m, May 28, 2001, K.H. Moon 5920 (TNS).