Osage Orange is an all-American wood. Any knife collection without it is incomplete.
Wikipedia says: “Osage orange's pre-Columbian range was largely restricted to a small area in what is now the United States, namely the Red River drainage of Oklahoma, Texas, and Arkansas, as well as the Blackland Prairies and post oak savannas.”
It also says: “The heavy, close-grained yellow-orange wood is dense and prized for tool handles, treenails, fence posts, and other applications requiring a strong dimensionally stable wood that withstands rot. Although its wood is commonly knotty and twisted, straight-grained Osage orange timber makes good bows, as once used by Native Americans. John Bradbury, a Scottish botanist who had traveled the interior United States extensively in the early 19th century, reported that a bow made of Osage timber could be traded for a horse and a blanket.