Most factory made furniture after the Civil War used poplar as the secondary wood, although some southern furniture still used pine. By the teens, however,
oak and sometimes maple would be used for drawers more and more, as poplar is a rather "soft" hardwood and tends to wear through constant use.
I've had to rebuild several American Victorian drawer sides over the years to square them up and make them functional again. That drawer bottom in the photo would be oak plywood. Poplar plywood bottoms were being used even by the late 1880s, prior to that the bottoms were solid poplar planed down at the edges. I can usually tell the approximate age and origin of most furniture if I can see the piece's drawer construction, whether American or European.