Myelochroa hayachinensis (Kurok.) 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 : 26

Myelochroa hayachinensis (Kurok.) Elix & Hale,

Mycotaxon 29: 240, 1987.

Basinonym: Parmelia hyachinensis Kurok., J. Jpn. Bot. 43: 350, 1968. Type collection: Japan. Honshu. Prov. Rikuchu: Kadomaguchi, Mt. Hayachine. Elevation about 970 m, July 25, 1967. S. Kurokawa 67081 (holotype TNS!).

For other synonyms, Kurokawa and Arakawa (1997).

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

Myelochroa hayachinensis resembles M. leucotyliza in having pustules on the thallus; however, it can be distinguished from the latter by producing galbinic acid and having moniliform cells in the medulla. As pointed out by Kurokawa (1968), this species is the pustulate morph of M. galbina .

Myelochroa hayachinensis has been reported only from Korea and Japan. It has been considered to belong to the Koreo-Japanese element as reported by Moon (1999).

In Korea, M. hayachinensis was first reported from Mt. Halla in Jeju Island by Park (1990). It has been reported from only three localities in Korea; the other two being Mt. Pukhan, Seoul ( Moon, 1998) and Mt. Backwoon ( Jayalal et al., 2012).

Specimens examined. Seoul, Songbuk-gu, Mt. Pukhan-san, on bark of Quercus mongolica along Chongnung stream, elevation about 240 m, August 24, 1997, K.H. Moon 1672 (TNS); Prov. Gyonggy (=Prov. Kyonggi), Koyang city, Mt. Pukhan-san, around Wonhyo temple, on bark of Quercus serrata , elevation about 250 m, July 24, 1997, K.H. Moon 2453 (TNS). Prov. Gyongsangnam, Milyang city, Sannae-myeon, Samyang-ri, Mt. Gaji, Route Ocheonpyeong Rock, on rocks, elevation about 310 m, September 8, 2009, K.H. Moon 11315 (NIBR). Prov. Jeollanam, Gohung-gun, Podu-myeon, Namseong-ri, en route from Mabok-sa temple to summit area, on rock with mosses, elevation about 200 m, October 20, 2013, K.H. Moon 13946 (NIBR). Prov. Jeju (=Prov. Cheju), Namcheju-gun, Namwon-up, Mt. Halla, along trail of Songpanak route to the summit, on bark of Quercus sp. , elevation about 900 m, May 28, 2001, H. Kashiwadani 43721 (TNS).