Interesting Facts about Oak Trees

• Quercus canariensis is better known by its colloquial name, Algerian oak.
• Blue oak (Quercus douglasii) can also be known as iron oak.
• Galls that affect oak species include oak artichoke gall, oak marble gall, oak apple gall, knopper gall and spangle gall.
• Ring-cupped oaks (Cyclobalanopsis) are distinguished from the Quercus sub-genus by the concrescent rings of scales on their acorns.
• Bur oak (Quercus macrocarpa) is sometimes misspelled as burr oak.
• The wood of an oak has a density of about 0.75g/cm³.
• Californian oak (Quercus kelloggii) is a native species of California.
• Quercus chrysolepis (canyon live oak) sometimes grows in canyons.
• Champion oak (Quercus rubra) is sometimes known as northern red oak.
• Eastern black oak (Quercus velutina) can also be called yellow oak. It has blackish outer bark but its inner bark is yellow.
• The coat of arms of Eigersund in Norway features an oak leaf.
• Island oak (Quercus tomentella) can be grown on islands.
• Mossycup white oak (Quercus macrocarpa) is another name for bur oak (see above).
• Dyer’s oak is another name for eastern black oak (see above).
• Quercus robur can be known as common oak, pedunculate oak, European oak or English oak.
• Quercus velutina (commonly known as eastern black oak or yellow oak, see above) can also be called yellowbark oak or spotted oak.
• Within the genus Quercus, the section Mesobalanus is sometimes included in the section Quercus.
• Oaks grow very, very slowly. Although some species grow faster than others.
• There are over 600 species of oak, although some of them are very similar to each other.