Appendix 1.
Specimens examined
Cuspidata cuspidata: JAPAN. Honshu: Mie pref., Owase-shi, Kuki, Kuki Shrine, 10 Oct. 2004, S. Fujii 10400 (KYO); Shiga Pref., Inubami-gun, Koura-cho, Ogawabara, 10 Oct. 1985, M. Ito 7021 (KYO). Kyushu: Kagoshima pref., Tarumizu City, Western foot of Mt. Takauama, 25 Sep. 1983, H. Takahashi 7492 (KYO). Shikoku: Kouchi Pref., Tosa-shi, Kitahara, Funato, 17 Nov. 1975, M. Okamoto 1545 (KYO); Kouchi Pref., Nakatosa Town, Between Kaminokae and Umagura, 15 Aug. 2003, T. Miyazaki 308070 (KH); Kouchi Pref., Nakatosa Town, Yamauchi, 4 Oct. 2003, T. Miyazaki 0310028 (KH); Kouchi Pref., Kubokawa town, Moriga-Uchi Rindou, 9 Oct. 2003, T. Miyazaki 0310344, 0310157 (KH).
Cuspidata sieboldii: JAPAN. Honshu: Kyoto-fu, Kyoto-si, Kamigyo, Kyotogyeon 3 street, 8 Dec. 1987, T. Takagi 224 (KYO); Shiga Pref. Takashima-shi, Kamo, Kamo-gawa, 20 Aug. 1987, H.T. Im 22630 (KB). Kyushu: Kagoshima pref., Isl. Yaku-sima, 2 Sep. 1933, M. Tagawa 1947 (KYO). Shikoku: Kouchi Pref., Sukumo-shi, Okinoshima-cho, Isl. Okinoshima, 5 Sep. 2006, S. Fujii 12127 (KYO).
KOREA. Gyeongsangnam-do: Geoje-si, Jisim Island, 4 May. 1928, T. Nakai 10986, 10985 (TI); Tongyeong-si, Hansan-myeon, 23 Aug. 2010, G.Y. Chung Tongyeong-si(hansando)-100823-047 (KH); Tongyeong-si, Yokji-myeon, 24 Aug. 2010, G.Y. Chung Tongyeong-si(Yokjido)-100824-134 (KH). Jeollanam-do: Goheung-gun, Oenaro-do, 22 May 1928, T. Nakai 10983 (TI); Goheunggun, Bongnae-myeon, Yenae-ri, Is. Naro, 25 Sep. 2015, J.K. Ahn, KOSPVP0000350682 (KB); Goheung-gun, Bongnae-myeon, Oenaro-do, Changpo, Isl., 9 Aug. 2001, J.S. Sun JJ110988 (KH); Jindo-gun, Jodo-myeon, Is. Gwanmae, 07 Jul. 2016, H.T. Im OJFWVP2121 (KB); Jindo-gun, Jodo-myeon, Sinyuk-ri, Isl. Hajo-do, 7 Sep. 2011, S.Y. Jeong, HJK110056 (KH); Sinan-gun, Heuksan-myeon, Heuksan Island, 23 Aug. 1919, T. Ishidoya & T.H. Chung 3416 (TI); Sinan-gun, Heuksan-myeon, Hong Island, 27 Aug. 1919, T. Ishidoya & T.H. Chung 3419 (TI); Sinan-gun, Heuksan-myeon, Mt. Biri, 18 Aug. 2017, H.R. Jeong, Daejangdo(Biri)-170818-070 (KH); Sinan-gun, Heuksan-myeon, Hongdo-ri, 30 Sep. 2017, J.H. Lee, Hongdo-170930-123, Hongdo-170930-162 (KH); Sinan-gun, Heuksan-myeon, Is. Hataedo, 01 Sep. 2012, J.K. Ahn 5624 (KB); Sinan-gun, Heuksanmyeon, Gageodo-ri, Mt. Hoeryong, 13 Jul. 2011, J.H. Kim NIBRVP307937 (KB); Sinan-gun, Heuksan-myeon, Mt. Ye-ri, 9 Oct. 2017, S.Y. In Heuksando(yeri)-171009-008 (KH); Wando-gun, Gunoe-myeon, Daemun-ri san 190-1, Wando Arboretum, 29 Aug. 2009, J.H. Jung 200902&200931-79, 200913& 200917-96, 200916&200924-70 (KB); Wando-gun, Wando-eup, Mt. Obong, 02 Jul. 2011, K.W. Lee 201108-0047 (KB); Yeosu-si, Geomun Isalnd, 24 May 1928, T. Nakai 10984; Yeosu-si, Is. Bogil, 23 Jul. 1993, H.T. Im, KOSPVP208169 (KB). Jeju-do: Jeju Isalnd, Oct. 1906, U. Faurie 184 (TI); Jeju Isalnd, 17 Aug. 1912, T. Nakai 227, 242 (TI); Southern Jeju Isalnd, 3 Nov. 1917, T. Nakai 4908 (TI); Jeju Isalnd, Mt. Halla, 17 May 1913, T. Nakai 937, 242 (TI); Jeju Isalnd, northern, 30 Oct. 1917, T. Nakai 4906 (TI); Jeju Isalnd, southern, 2 Nov. 1917, T. Nakai 4906, 4907 (TI); Jejusi, Hangyeong-myeon, Cheongsu-ri, Cheongsu-Gotjawal, 12 Oct. 2012, D.S. Kim, HALLA1871 (KH); Jeju-si, Jocheon-eup, Dongbaek-ro, Dongback Dongsan, 3 Oct. 2023, E.D. Lee, Dongback Dongsan 231003-001 (KH); Jeju-si, Gujwa-eup, Pyeongdairi, 08. Aug. 2008, H.W. Kim 2008-0514 (KB); Jeju-si, Haean-dong, Mt. Halla youngsil~wisseoleum~eolimok, 8 Jul. 2005, K.J. Kim VP7400044038 (KB); Jeju-si, Hangyeong-myeon, Myeongi-dong, 21 Sep. 2006, S.H. Park, ParkSH62057 (KH); Seogwiposi, Hong-ro, 6 Jun. 1913, T. Nakai s.n. (TI); Seogwipo-si, Hong-ro, Oct. 1913, E.J. Taquet 6221, 6223 (TI); Southern Jeju Isalnd, 3 Nov. 1917, T. Nakai 4908 (TI); Seogwipo-si, Namwon-eup, Sillyecheon-ro, 3 Oct. 2023, E.D. Lee, Sillyecheon 202310-001, Sillyecheon 202310-002, Sillyecheon 202310-003 (KH); Seogwipo-si, Seogwng-ri, Gotjawal, 16 Oct. 2005, E.S. Jeon, ESJeon 53456 (KH); Seogwipo-si, Andeok-myon, 20 Jun. 1997, S.B. Yun, JNU 2476, JNU 2473(KB); Seogwipo-si, Cheonjiyeon, 14 Jul. 2007, Y.S. Kim KOSPVP107743 (KB).