Oregon State University
Alphabetical List of Tree Common Names Alphabetical List of Tree Scientific Names Identification Key Mystery Tree

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California black oak (Quercus kelloggii)

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  • Size: Grow to 80' tall and 3' in diameter, but usually smaller.

  • Leaves: Simple, alternate, deciduous. Pinnately lobed with 7 pointed and bristle-tipped lobes.

  • Fruit: Acorn with deep cap; 1"-2" long.

  • Twigs: Stout with buds clustered near the tip.

  • Bark: Dark with irregular plates. About 1" thick.

  • Distribution: California black oak is most common in California, but it stretches as far north as the Umpqua Valley in Oregon.

Oregon white oak (Quercus garryana)
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  • Size: Grows to 80' tall and 3' in diameter. Has a rounded crown when open-grown.

  • Leaves: Simple, alternate, deciduous. Pinnately lobed with 7-9 rounded lobes; lobes often irregular. 3"-6" long and 2"-5" wide.

  • Fruit: Acorn with shallow cap; about 1" long.

  • Twigs: Stout; several buds clustered at tip; fuzzy buds. Pit is star-shaped.

  • Bark: Grayish; may be shaggy or have shallow ridges and fissures.

  • Distribution: Oregon white oak occurs throughout the Siskiyou Mountains, but seldom ventures west of the Coast Range summit. Only along the Columbia Gorge does it venture into eastern Oregon.

canyon live oak (Quercus chrysolepis)
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  • Size: May be a shrub to 15' tall or a tree to 80' tall and 2' in diameter.

  • Leaves: Two distinctive types on same plant. All are simple, alternate, evergreen; 1"-4" long. Some have smooth edges while some are spiked like holly leaves.

  • Fruit: Acorn from 1/2" - 2" long. Cap is variable, but generally shallow.

  • Twigs: Slender; buds clustered at tips. Pith is star-shaped.

  • Bark: Grayish-brown and scaly. Thin (about 1" thick).

  • Distribution: Canyon live oak grows in the rough, dry country of southwestern Oregon and south through California. It grows along canyon bottoms or other places where it has favorable soil and moisture.

For more information about these species see "Trees to Know in Oregon".

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