Caltha palustris subsp.sibirica (Regel) Hultén; C. sibirica (Regel) Tolmatchev.

Stems decumbent at anthesis, solid, to 50 cm tall, ca. 6 mm in diam. at fruiting. Leaves below inflorescence usually smaller than basal leaves. Leaf blades broadly triangular-reniform, base broadly cordate, margin dentate basally, repand or subentire apically. 2n = 56--80.

Marshes, wet places in valleys, in water. Heilongjiang, Jilin, Liaoning, Nei Mongol [Korea, Mongolia, Russia (Far East)].