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22. Northern Pin Oak
The Northern Pin Oak (Quercus ellipsoidalis) is native to Minnesota and many trees of this species are present across the Winona State University campus. The Northern Pin Oak is one of more than 600 species of Oak in the world, of which 60 or so are found in the United States. This tree prefers sandy, acid soils and is frequently found growing on dry, sandy hillsides.
The lobed leaves of the Northern Pin Oak are 4 to 6 inches long and feature up to 7 narrow, pointed-tip lobes. The leaves are glossy and dark green throughout summer, turning a deep red to reddish-brown in the fall, adding spectacular beauty to the fall color across campus.
The leaves of the Northern Pin Oak are subject to chlorosis in high pH soils. Unlike most deciduous fall-color trees, the leaves of the Northern Pin Oak are likely to hang on the tree until early spring.
The Northern Pin Oak develops tiny flowers on 1 to 4 inch catkins in the spring before the leaves have fully developed. Green acorns turn brown in the fall and are edible, but contain small amounts of tannic acid which can be poisonous in large amounts.
Several Northern Pin Oak trees are part of a formally-designed area just west of Phelps Hall, surrounding the Davis-Schoen Garden. This formal garden was created in May of 2000 through the generosity of WSU Alumnus Harry Schoen in honor of Edward M. Davis, a Winona State professor of history and economics from 1945-1961.
(see #40 on the maps)
Last Modified: Thursday, May 08, 2008 13:59 by