Family: Betulaceae
[Betula japonica (Miq.) Siebold, more..., Betula kamtschatica (Regel) Jansson ex Vassiljev, Betula mandshurica (Regel) Nakai, Betula mandshurica var. japonica (Miq.) Rehder, Betula mandshurica var. kamtschatica (Regel) Rehder, Betula mandshurica var. szechuanica (C.K. Schneid.) Rehder, Betula platyphylla var. japonica (Miq.) H. Hara [excluded], Betula platyphylla var. kamtschatica (Regel) H. Hara [excluded], Betula platyphylla var. platyphylla Sukaczev, Betula platyphylla var. szechuanica C.K. Schneid., Betula szechuanica (C.K. Schneid.) C.A. Jansson]
TANAKA Juuyoh (????)
