Side veins are usually straighter, with most remaining at a 45° angle to the leaf midrib. Bur Oak (Q. macrocarpa) – Another massive shade tree, the bur oak grows 70 to 80 feet tall (22-24 m.). Pin oak kermes scale and Bur oak kermes scale are the most common species found on oak trees. 6c. Oak Identification United States Department of Agriculture FHTET-2003-01 January 2003 Forest Service. The sawtooth oak’s acorns are also different, resembling the bur oak. Form. It is well adaptive to the open prairie where its thick protective bark is an adaptation to a fire ecology as well as tolerance to drier, sandy soils. Bur oak grows in a range of habitats and moisture regimes Œ from prairies to valley floors and upland woods. About 70 oak species grow to tree size in North America. Scales close to the tip of the acorn cap have shorter tips. Bur oak (Quercus macrocarpa) 14 Overcup oak (Quercus lyrata) 15 Swamp white oak (Quercus bicolor) 15 References 16. Information on the Bur Oak Tree. They can cause dieback, stunted growth, and produce honeydew which in turn causes sooty mold issues. Bur oak and swamp white oak are very similar and can occupy the same habitat, especially in the Midwest where both are common. Quercus, native to North America in the eastern and central United States and eastern and central Canada. Oak is part of the common name of about 400 species of trees and shrubs in the genus Quercus, from the Latin for "oak tree." ... Other white oak family members include the bur oak, chestnut oak, and Oregon white oak. BOB causes leaf browning and leaf loss in late summer and early fall. Scales at the edge of acorn cap have elongated tips which curl backwards, creating a "mossy" appearance. Oak, Bur Common Name: Bur Oak Quercus macrocarpa Tree Size: Large Leaf Type: Deciduous Comments: Excellent, drought-tolerant native tree, with rough texture and large acorn More About this Tree. plant symbol = QUMA2 Contributed By: USDA, NRCS, National Plant Data Center & the Biota of North America Program Alternate common names Blue oak, mossycup oak, mossy-overcup oak Uses Bur oak wood is used for cabinetry, barrels, hardwood flooring, and fence posts. Proper tree identification is the first step to understanding and managing our forests. Botanical name: Quercus macrocarpa Leaves broadly 3-lobed at apex, narrowing at base, bark dark and blocky, tree of dry ridges: Quercus marilandica (blackjack oak) 11. Boulder Tree Care – Pruning & Tree Removal Services. Prevention & Treatment: Remove infected trees and replant the area with resistant tree species. Fully mature trees can grow massive 8 – 10′ diameter trunks with a huge open crown, that can be as wide as the tree is tall. Trunk diameters for the bur oak typically range from 2 to 3 feet. The cap of this fruit covers nearly all of the nut, with hair-like fibers protruding from the cap’s end. The two middle sinuses nearly reach the midrib dividing leaf nearly in half. Large acorns with fringed caps attract birds and small mammals. Close observation of several Bur oak acorns are generally 1-seeded with a cup that covers at least 33% of the nut and may, though rarely, cover the entire nut [63,87,90,211,237]. ii iii ACKNOWLEDGMENTS The authors wish to thank all those who helped with this publication. Quercus, native to North America in the eastern and central United States and eastern and central Canada.This plant is also called mossycup oak and mossycup white oak. This oak … It damages red, silver, and sugar maples, hackberry, elm, and sweetgum. This group is characterized by having rounded lobes on the leaves and acorns which mature in a single growing season and sprout soon after they fall in the autumn. Bur oak leaf litter is slow to decompose and highly flammable; the leaf shape tends to curl and dry out, sitting loosely on the ground, even after a snowy winter. Bur Oak – Tree Identification. The second part of the scientific name or specific epithet, Fully mature trees can grow massive 8 – 10′ diameter trunks with a huge open. The bark color of oaks ranges from whitish-gray to dark, almost black. The second part of the scientific name or specific epithet, macrocarpa means large seed or fruit and the bur oak produces the largest acorns (up to 2 inches in diameter) of all the oaks found in North America. This disease more commonly affects pin oak, red oak, white oak, bur oak, shingle oak, and sycamore. Although they can co-occur on some sites, Bur Oak is more likely in flood-prone bottomlands, fire-prone savannas at the transition zone to prairie, on calcareous soils, or on extremely dry ridges, whereas white oak is more likely in mesic to slightly dry oak forests. Acorn size and … Side veins from the leaf's halfway point and closer to the base, often curve outward, with some curving as far as to point perpendicular to the midrib as they approach the leaf margin. Canyon Live Oak Leaf, Scientific Name: Quercus chrysolepis. We are grateful for permission to use the drawings illustrated by John K. Myers, Flagstaff, AZ, published in the Flora of North America, North of Mexico, vol. Bur oak or mossycup oak is a medium- to tall-stature deciduous tree widely distributed across the United States. The shiny leaves of this tree are variable, but are usually divided into two or more portions, with the typical rounded lobes of all members of the white oak group. 6b. Its massive trunk has gray to brown furrowed bark and its branches bear lustrous dark green leaves that turn yellow-brown in fall. The lobes at the leaf’s tip look like a crown. You can identify oak trees by their deeply lobed leaves with pointed or rounded tips. Some scales farther back on the cap may have longer tips. 1). Bur oaks fair well in urban environments. Conversely, Red Oak tends to be slightly redder, but is by no means a reliable method of determining the type of Oak. The two sinuses in the center divide the bur oak leaf into almost half. A.K.A. bur oak Fagaceae Quercus macrocarpa Michx. These are soft scales, which resemble an inverted leathery bowl. It is a pioneer or early seral species at prairie margins, but bur oak savannas have declined due to grazing and fire suppression. The bur oak leaves are roughly obovate in shape, and have many lobes. Small, black fruiting bodies, which contain fungal spores become visible along the undersides of these veins. Bur oak produces male flowers in 3- to 4-inch (7-10 cm) long catkins, and female flowers are solitary or in clusters of up to 4 [90,234]. This cup has a bristle fringe around the upper edge.Depending on where it grows, the bur oak can be different shapes. Cup covers 1/2 or more of the acorn. However, certain key characteristics of bark, leaf shape, and acorns can usually distinguish them. https://www.arborday.org/trees/treeguide/treedetail.cfm?itemID=874 Symptoms of BOB become visible during mid-July with the presence of small circular leaf spots displaying colors of reds, purples, and browns. Habitat: Grows on dry uplands and slopes. willow species 12 12 13 13 14 14 Bur oak has several desirable attributes including strong branches, drought tolerance, winter hardiness, and freedom from serious insects or diseases. They can cause dieback, stunted growth, and produce honeydew which in turn causes sooty mold issues. The two sinuses in the center divide the bur oak leaf into almost half. Northern Red Oak acorns are about an inch long with a flat cap that barely covers the end of the acorn. A Bur Oak leaf will be up to 12 inches long and have numerous small lobes. Its acorns, which are 1.5 to 3 centimetres long, have a deep cup covering 2/3 of the acorn. However, certain key characteristics of bark, leaf shape, and acorns can usually distinguish them. Oak Tree Identification To identify oak trees, look for bark that has deep fissures and ridges, giving it a scaly look. These two species can hybridize and possibly form intergrades. It’s usually tall with a straight trunk but if grown in shallow soil, it can be smaller with a twisted trunk and gnarled branches. Quercus macrocarpa, the bur oak, sometimes spelled burr oak, is a species of oak in the white oak section Quercus sect.
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