Willow Oak Acorn Small 320×294 Medium 640×588 Large 1024×942 Download TIFF Original 1465×1347 | (1.9 MB) Description This shows the acorn of Willow Oak, Quercus phellos, (Keeler, 1915). Keywords acorn, Botany, fruit, koak, Oak Family, Quercus, seeds, Willow Oak Galleries Oak Trees, Seeds, Trees: A Source: Harriet L. Keeler, Our Native Trees and How To Identify them (New York:Charles Scribner's Sons, 1915) 375