Douglas Fir wani nau'in bishiyar coniferous ne da aka samo asali a yammacin Arewacin Amurka, wanda yake da tsayinsa da tsayinsa. Sunan ta ne bayan ɗan asalin ƙasar Scotland David Douglas, wanda ya fara rubuta bishiyar a ƙarni na 19. Itacen Douglas Fir ana amfani da shi sosai wajen gine-gine da ƙera kayan daki saboda ƙarfinsa da ƙarfinsa.
