7. Northern Pin Oak – Quercus ellipsoidalis (lobes end in fine point)

Arboretum tour botany 410 -Ornamental tree

7. Northern Pin Oak – Quercus ellipsoidalis (lobes end in fine point)

Yakima, Washington 98901, United States

Created By: Cresanna Zintzun

Information

leaves are glossy green, 7–13 cm (2 3⁄4–5 in) long and 5–10 cm (2–4 in) broad, lobed, with five or seven lobes, and deep sinuses between the lobes. Each lobe has 3-7 bristle-tipped teeth. The leaf is nearly hairless, except for small tufts of pale orange-brown down where the lobe veins join the central vein. The acorns tend to be ellipsoid (ellipse-shaped, from which its scientific name derives), a third to a half covered in a deep cup, green maturing pale brown about 18 months after pollination; the kernel is very bitter. The inner surface of the acorn cap is glabrous (hairless) to sparsely or moderately pubescent, and the hairs if present tend to be kinky rather than straight

This point of interest is part of the tour: Arboretum tour botany 410 -Ornamental tree


 

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