⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record kew-21817, with some changes.

Betula verrucosa subsp. oycowiensis (Besser) Nyman is a synonym of Betula pendula var. oycowiensis (Besser) Dippel

The record derives from WCSP which reports it as a synonym (record 21817) with original publication details: Consp. Fl. Eur. 672 1881.