Family Betulaceae
Betula
Betula ×borggreveana
Betula ×dutillyi
Betula ×hornei [X]
Betula ×sandbergii [X]
Betula ×sargentii [X]
Betula ×ungavensis [X]
Betula alleghaniensis
Betula cordifolia
Betula glandulosa
Betula michauxii
Betula minor
Betula nana [X]
Betula occidentalis [X]
Betula papyrifera
Betula pendula [X]
Betula pubescens [X]
Betula pumila