Philip Noel Knorr 1916 - 2012 was a University of Arizona Professor of Forestry. He earned his B.S. Degree with Honors from the University of California at Berkeley, his Masters of Forestry from Duke University and his Ph.D. in Forest Management from the University of Minnesota. He served with the US ARMY Air Force from 1942 until 1945 as an aerial photogrammetry and photo interpretation specialist. He was recalled to service during the Korean War and was stationed in London. Before and after his military service, he participated actively on the faculties of Oregon State University and the University of Minnesota. In 1959 he joined the faculty of the University of Arizona in the Department of Watershed Management. He contributed to the development of the Academic Foundation for the Department of Watershed Management, later the School of Renewable Natural Resources. While actively involved in many aspects of the academic program he was dedicated to his role as an educator and had significant influence on his many students as a caring and committed teacher, advisor and mentor. He helped students to have a vision for their future and to use their university experiences to reach their life and career goals. He retired in 1983. Philip continued his interest and influence on the University of Arizona through his endowment to the Campus Arboretum, the oldest continually maintained public green space in Arizona. He was awarded the Distinguished Service Award by the School of Renewable Natural Resources in 2003 and the Lifetime Achievement Award by the College of Agriculture and Life Sciences in 2007. He was elected by his peers to be a Fellow of the American Association for the Advancement of Science. Philip was an enthusiastic and significant supporter of the Campus Arboretum-sponsored benches along the University of Arizona Olive Walk. When you are in the area please take a moment to take in the ambience of the Olive Walk and the spirit of generosity Philip embodied.