![]() The fruit is a rounded acorn with a relatively flat top with smooth scales, which covers only about one quarter of the nut. The trunk of pin oak is typically straight and single stemmed, while the bark is smooth and gray and may develop dark fissures with age. The pin oak tends to keep its lower branches for a long period of time, which can create pin knots in the wood. One key characteristic of pin oak are the branches, which angle downward especially on the lower part of the tree. In the fall, leaves change from medium green to a red to reddish brown color. On the pin oak, the alternately held leaves typically have less lobes than other members of the red/black oak group. The leaves of pin oak are multi-lobed, with lobes coming out at nearly a 90-degree angle from the center of the leaves, and feature bristle tips like all members of the red/black oak family. This week, we take a look at the eighth of our featured oak varieties in Indiana, the Pin Oak or Quercus palustris. The field guide helps identify common Indiana woodlot trees.Įach week, the Intro to Trees of Indiana web series will offer a sneak peek at one species from the book, paired with an ID That Tree video from Purdue Extension forester Lenny Farlee to help visualize each species as it stands in the woods. Threats to species health as well as also insight into the wood provided by the species, will be provided through additional resources as well as the Hardwoods of the Central Midwest exhibit of the Purdue Arboretum, if available. The full publication is available for download for $7 in the Purdue Extension Education Store. Nearly 70 years later, the publication has been updated through a joint effort by the Purdue Department of Forestry and Natural Resources, Indiana 4-H, and the Indiana Department of Natural Resources, and reintroduced as “An Introduction to Trees of Indiana.” Shaw was published in 1956 as a user-friendly guide to local species. Oak wilt is common in the Midwest.The classic and trusted book “Fifty Common Trees of Indiana” by T.E. It has to have an acidic site however, as landscape trees have shown iron chlorosis when the soil pH is too high.įew on the West Coast of the United States. While Pin Oak likes a well drained site it can tolerate wetter sites as well. For this species the nuts are small (1/2” long) with a thin, saucer-like cup. The fruit of this oak are the well known acorns. ![]() ![]() In the fall the leaves turn a bronze to brilliant red color before they take on their dull tan winter color. A characteristic V-shaped is noted at the base of the leaves where they attach to the stems.ĭuring the summer the leaves are bright green above and pale beneath. Major lobes form a U-shape, as opposed to C-shaped as with Scarlet oak. It bears alternately arranged, simple leaves which are 3”-6” long, with an oval shape, with 5 to 9 bristle-tipped lobes and irregularly deep sinuses that extend nearly to the midrib. Conversely, the middle branches on the Pin Oak are arranged at right angle to the main stem. Pin Oaks are large deciduous trees that can grow quickly to an eventual height of 75’ in a pyramidal shape with lower limbs that hang down (as opposed to Scarlet Oak limbs which point up). In the Northwest it is best known for its leaf retention during the winter months. Description Pin Oak, also called swamp oak or water oak, is a Northeast native oak that frequently grows on bottom lands or moist uplands, often on poorly drained clay soils.
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