Ahlgren, Clifford E. Former director of the Quetico-Superior Wilderness Research Center and co-author of the book, "Lob Trees in the Wilderness", died on April 19 2016, at his residence in Sun City, AZ. Born in Toimi, MN in 1922, Cliff lived in the Duluth and Ely areas until his retirement. While director of the Wilderness Center, Cliff and his wife Isabel successfully developed a rust disease-resistant strain of White Pine. Cliff was preceded in death by his daughter, Molly O. Ahlgren of Sitka, Alaska and is survived by his wife, Isabel F. Ahlgren of Sun City, AZ; son, Clifford L. Ahlgren (Nancy) of Buffalo, and grandson, Samuel.