14a. Corylus sieboldiana Blume var. sieboldiana

C. rostrata var. mitis Maxim., Bulletin de l’Académie Impériale des Sciences de St.-Pétersbourg 27: 539 (Maximowicz 1881). – C. sieboldiana var. mitis (Maxim.) Nakai, Flora Sylvatica Koreana 2: 13 (Nakai 1915). – Original citation: “Japonia. Nippon. Fudzi yama.” – Type: Japan, Fudji yama, 1864, S. Tschonoski s.n. (holo-: LE; iso-: BM!, BR!, GH00033783!, K000859897! K000859896!, P06810985!). – Note: Corylus rostrata var. mitis was regarded as synonymous to C. sieboldiana in the Flora of Japan (Ohwi 1965) and the World Checklist and Bibliography of Fagales (Govaerts & Frodin 1998) .

C. sieboldiana var. brevirostris C.K.Schneid., Plantae Wilsonianae 2: 453 (Sargent 1916). – C. brevirostris (C.K.Schneid.) Miyabe, Journal of the Faculty of Agriculture, Hokkaido University 26: 458 (Miyabe & Kudo 1934). – Type: Japan, Hokkaido, Shiribeshi-san, 700 m a.s.l., 27 Jul. 1914, E.H. Wilson 7268 (holo-: A00033784!). – Additional type material: Japan, Hakodate, 1861, C. Maximowicz s.n. (para-: BM!); Japan, Northern Honshū, prov. Mutsu, Hakkoda Mountain, Aug. 1904, U. Faurie 5803 (para-: BM!, E00020189!). – Note: Corylus brevirostris was recognized as a separate species by World Checklist and Bibliography of Fagales (Govaerts & Frodin 1998), while it is recognized as C. sieboldiana var. brevirostris in the Flora of Japan (Ohwi 1965).

C. hallaisanensis Nakai, Repertorium Specierum Novarum Regni Vegetabilis 13: 250 (Nakai 1914). – Original citation: “Quelpaert: in silvis Hallaisan.” – Type: Korea, Hallasan Mountain, Oct. 1907, E.J. Taquet 333 (syn-: not localized; isosyn-: E00020176!, TI); ibid., 12 Jun. 1913, T. Nakai 335 (syn-: not localized); ibid., 17 May 1913, T. Nakai 930 (syn-: not localized). – Note: Corylus hallaisanensis was recognized as separate species in the World Checklist and Bibliography of Fagales (Govaerts & Frodin 1998) . Chang et al. (2004) suggested synonymizing this name to be under C. sieboldiana, but fail to indicate to which of the two varieties it is supposed to belong ( C. sieboldiana var. mandshurica or C. sieboldiana var. sieboldiana).