The wood of the American tuliptree, " Liriodendron tulipifera " and the wood of the cucumbertree magnolia, " Magnolia acuminata ", and, to a lesser degree, that of the Frasier magnolia, " Magnolia fraseri ", are harvested and marketed collectively as " yellow poplar . " This is a lightweight and exceptionally fine-grained wood, lending itself to precision woodworking for purposes such as pipe organ building.