jack oak

noun

Definition of jack oak

2 : an extremely variable oak (Quercus ellipsoidalis) of east central North America having leaves with sharply pointed lobes and ashy gray turbinate to goblet-shaped acorn cups with persistent dull pubescence

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“Jack oak.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/jack%20oak. Accessed 14 Apr. 2021.

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