Notes on Allium section Rhizirideum (Amaryllidaceae) in South Korea and northeastern China: with a new species from Ulleungdo Island Author Jang, Ju Eun Department of Biology and Chemistry, Changwon National University, Changwon 51140, South Korea Author Park, Jong-Soo Division of Forest Biodiversity and Herbarium, Korea National Arboretum, Pocheon 11186, South Korea Author Jung, Ji-Young Division of Plant Resources, Korea National Arboretum, Pocheon 11186, South Korea Author Kim, Dong-Kap Division of Forest Biodiversity and Herbarium, Korea National Arboretum, Pocheon 11186, South Korea Author Yang, Sungyu Herbal Medicine Resources Research Center, Korea Institute of Oriental Medicine, Naju 58245, South Korea Author Choi, Hyeok Jae https://orcid.org/0000-0001-6315-0071 Department of Biology and Chemistry, Changwon National University, Changwon 51140, South Korea skinh@hanmail.net text PhytoKeys 2021 2021-04-16 176 1 19 http://dx.doi.org/10.3897/phytokeys.176.63378 journal article http://dx.doi.org/10.3897/phytokeys.176.63378 1314-2003-176-1 23DD4AE5061F55CDA95992F080B24A26 Allium spurium G.Don, Mem. Wern. Nat. Hist. Soc. vi. 59 (1827) Fig. 1K-O Allium dauricum N.Friesen, Fl. Sibir. (Arac.-Orchidac.) 58 (1987). Type: Russia. Transbaicalia Orientalis, pagum Kyra, in valle fuvii Bukukum, in prato substepposo, 31 Aug. 1964, G.Peschkova & L.Ovczinnicova s.n. (Holotype: LE!; Isotypes: NSK). Type . Russia (Siberia, location in doubt). Type specimen not designated (protologue). Notes. Allium spurium is occasionally confused with A. spirale because of its more or less similar growth habit, but the most distinctive characters include narrower leaf blades and scapes and smaller floral parts (Table 3 ; Fig. 1L-N ). This species is newly recorded for South Korea, and the new vernacular name 'Gak-si-du-me-bu-chu' is given. Besides, Cheongnyangsan of South Korea is the disjunct southernmost limit for geographical distribution of A. spurium (Fig. 5 ). Specimens examined. China . Jilin : Helong , 8 Sep. 2007 , H.J.Choi s.n. (KH); Helong, 9 Sep. 2007 , H.J.Choi s.n. (KH); Baishan, Linjiang, 29 Apr. 2019 , H.J.Choi 190429-01 (CWNU); Erdaobaihe, 08 Sep. 2019 , H.J.Choi 190908-001-01 * (CWNU) . North Korea . Hambuk : Yonsa , 25 Aug. 1958 , C.K.Gen s.n. (LE). Hamnam: Sinpo, 3 Oct. 2002 , B.U.Oh 020062 (CBU); Hungnam, 21 Aug. 1956 , C.K.Gen s.n. (LE). Phyonbuk: Huchang, 22 Aug. 1897 , Komarov s.n. (LE); Jasong, 27 Aug. 1897 , Komarov s.n. (LE) . South Korea . Gyeongbuk : Bonghwa , Cheongnyangsan , 31 Aug. 2020 , H.J.Choi 200831-01 * (CWNU) .