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Transcript
Common Name of Plant: Bur Oak Scientific Name of Plant: Quercus macrocarpa Average Height of Plant: 80 feet or more Blooming Time: May- June Ask the Botanist What are the leaves like? The leaves are simple, lobed, and about 6-10 inches long. The leaves resemble white oak but the indentation (sinus) midway in the leaves is very deep. The leaves are alternate on the branches but tend to be clustered at the ends of the branches. The underside of the leaf is pale compared to the darker topside. What type of flowers bloom on this plant? What do the seedpods or seeds look like? Each bur oak tree has both male and female flowers. The pollen is formed on the yellowgreen catkins (male flower) while the much smaller red female flowers produce the acorns (seeds) each year. A burr-like, cup-shaped cap covers each acorn which have a bitter taste. The acorns germinate in autumn. What is unusual about the stem or trunk? The bark is dark-gray to black with deep furrows. It has a corky appearance. The thick bark can withstand prairie fires unlike most trees. How is this plant important to animals? Has it also been used by people? Many insects eat the leaves of bur oak trees. Squirrels, chipmunks, and other animals use the acorns for food. The wood is heavy, hard, strong and durable. It is used for furniture, interior finishes, and construction. Native Americans used bur oak to treat several illnesses. What location does this plant prefer? Bur oaks prefer moist, well-drained soil but can tolerate drought and occasional flooding. They are moderately shade-tolerant. They are especially found in places where forests are changing to prairies and where other types of oak trees are growing. Pictures Whole Plant Leaf www.netstate.com/states/symb/trees/ia_oak.htm www.netstate.com/states/symb/trees/ia_oak.htm Buds Flowers extension.usu.edu/.../HomeTown/Select_BurOak.htm Seeds Stem or Tree Bark www.netstate.com/states/symb/trees/ia_oak.htm extension.usu.edu/.../HomeTown/Select_BurOak.htm