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* It is also sometimes known as the Mountain Oak, and occasionally the Iron Oak. * The name Blue Oak derives from the dark blue-green tint of its leaves, which are deciduous, 4–10 cm long, and entire or shallowly lobed.
- Botanical Name: Quercus douglasii
- Minimum Hardiness Zone: 8
- Common Name: Blue Oak
- Height: 45-75 feet
- Genus: Quercus
- Family: Fagaceae