Hybrid black poplar
Image of a hand-tinted lantern slide of a Carolina Poplar and the back of a White Oak.
Roger Williams Park Museum of Natural History and Planetarium
Rhode Island State Archives
Still Image Item Type Metadata
Roger Williams Park Museum of Natural History and Planetarium, "Carolina Poplar," in Virtual Exhibits, Item #419, http://www.sos.ri.gov/virtualarchives/items/show/419 (accessed March 7, 2014).