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betula pendula subsp. fontqueriabedul péndulobetula pendula roth subsp pendulabetula pendulaalbaalbáabedul penduloalbarenabedul comunbiesobetula pendula subsp fontqueribetula pendula var parvibracteatabetula alba ssp verrucosaabedul verrucosobetula verrucosabetula alba var. fontqueribarrazeraabedul verrugosobidueiro