Dutsen Alder wani nau'i ne na bishiyar da ke zaune a Arewacin Amirka kuma yana cikin dangin Betulaceae. Kalmar "dutse" a cikin sunan tana nufin wurin zama na bishiyar a cikin tudu mafi girma, yawanci a yankuna masu tsaunuka. Kalmar “alder” tana nufin rabe-raben bishiyar a cikin jinsin alder (Alnus). A takaice, Mountain Alder wani nau'in bishiya ne da ke cikin dangin alder kuma yana girma a yankuna masu tsaunuka.