6th March 1897 – 2020
…Betula albosinensis var. septemtrionalis Betula raddeana Betula utilis ssp. jacquemontii Betula pubescens Betula papyrifera Betula var. commutata Betula alleghaniensis Betula dahurica Betula albosinensis Betula pendula ssp. populifolis Betula x caerulea…