Myelochroa leucotyliza (Nyl.) 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 : 29

Myelochroa leucotyliza (Nyl.) Elix & Hale,

Mycotaxon 29: 241, 1987.

Basinonym: Parmelia leucotyliza Nyl., Lich. Japon.: 27, 1890. Type collection. Japan, Rokosan, E. Almquist s. n. (lectotype in H; Nylander Herb. 35196!).

For other synonyms, see Hale (1976).

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

Myelochroa leucotyliza is characterized by the pustulate lobes forming granular soredia, the absence of moniliform cells in the medulla and the lack of galbinic acid. It resembles M. aurulenta , which differs in having farinose soredia. Externally it also resembles M. hayachinensis , but it is easily distinguished from the latter by the absence of galbinic acid.

All specimens of this species collected in Korea (NIBR and TNS) always contain leucotylin and lack leucotylic acid as confirmed by Japanese material ( Kurokawa and Arakawa, 1997).

Myelochroa leucotyliza has been reported from Japan, Malaysia, China and Nepal ( Kurokawa and Arakawa, 1997). It is one of the common foliose lichen in Korea. It has been reported from Korea ( Park, 1990; Moon, 1998; 1999; Kashiwadani et al., 2002; Jayalal et al., 2012; and as the Parmelia leucotyliza by Lee, 1987).

Representative specimens examined. Prov. Gangwon (=Prov. Kangwon), Inje-gun, Mt. Sorak, around Paektam temple, on rock, elevation about 460- 550 m. July 17, 1996, K.H. Moon 699 & H. Kashiwadani (TNS); Hongcheon-gun, Nae-myeon, Myeonggae-ri, Mt. Ohdae, en route from Mt. Ohdae control office at Myounggyeri to Bukdae Temple, on bark of Quercus sp. , elevation about 830 m, April 23, 2009, K.H. Moon 10902 (NIBR). Seoul, Kangbuk-gu, Mt. Pukhan-san, en route from Paegundae ticket office to Wimun via Kaltak pass, on bark of Quercus mongolica , elevation about 525 m, August 24, 1997, H. Kashiwadani 40399 (TNS). Prov. Gyongsangbuk, Cheongsong-gun, Budong-myeon, Sangui-ri, Mt. Juwang, en route from Daegeon temple to Mt. Janggun-bong via Backryong-am (hermitage), on bark, elevation about 270 m, October 13, 2013 (NIBR). Prov. Gyongsangnam, Milyang city, Danjang-myeon, Gucheon-ri, Mt. Gaji, around Pyochung Temple, on bark of Zelkova serrata , elevation about 165 m, September 8, 2009, K.H. Moon 11321 (NIBR); Hadong-gun, Hwagae-myeon, Daeseongri, Mt. Jiri, en route from Daeseong strem area to Seseok hut, on bark, elevation about 1100 m, August 10, 2006, K.H. Moon 9005 (NIBR). Prov. Jeonllanam, Gohung-gun, Podu-myeon, Mt. Cheoungeung-san, St. Gumtap-gil, around Geumtap temple, on bark of Zelkova serrata , elevation about 100 m, October 18, 2013, K.H. Moon 13870 (NIBR). Prov. Jeju (= Prov. Cheju), Jeju city, Jocheon-eup, Seonheul-ri, around South entrance area, on bark of Cornus controversa , elevation about 100 m, May 24, 2012, K.H. Moon 13003 (NIBR); Jeju city (=Cheju-shi), Odung-dong, Kwanum temple, on bark of Castanea crenata , elevation about 580 m, May 29, 2001, K.H. Moon 5947 (TNS).

Type specimens examined. Japan, Honshu, Prov. Musashi (Metropolice of Tokyo), Inokashira, June 23, 1924, Y. Asahina 23a as Parmelia fraudans ssp. subfraudans Zahlbr. (holotype in W; isotype in TNS!). Japan, Honshu, Prov. Suruga, Hakone, Mt. Higane, October 15, 1922, S. Yamashita (hb. Y. Asahina 17) as Parmelia leucutyliza f. rugulosa Asahina (lectotype in TNS!). Japan, Honshu, Prov. Suruga, Kadoike, August 17, 1929, Y. Asahina s. n. (lecotype in TNS!).