Tag Archives: Garry oak

Oregon white oak profile

10 Feb

Quercus garryana is a special tree because it is the only native oak found north of Eugene, OR. It lives on the west side of the Cascades, primarily in the Willamette, Umpqua and Rogue River Valleys, and along the Gorge. It also occupies a similar range in Washington and British Columbia, and grows up into the foothills in California.

It is a very drought tolerant and slow growing tree. Historically, frequent low-intensity fires have maintained its dominance on oak savannas throughout its range. Because it is fire resistant when mature and a vigorous sprouter at all ages, it is adapted to thrive in this type of fire regime, which also keeps the seedlings of faster growing species at bay. Native Americans set fires in these habitats to promote the growth of important food sources like the Camas lily, prized for its starchy bulbs (and pictured with oaks above).

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