As you can imagine, there are hundreds of books and websites that cover the topic of wildflowers in Oregon. When I began this new "hobby" I first looked in the Hillsboro library, which has a generous number of books available. These are located in the non-fiction section of area 582.13.
Some of my favorites so far are:
Pacific Northwest Wildflowers, by Damian Fagan.
Lewis Clark's Wildflower Guides: Forest and Woodland, and Field and Slope.
Wildflowers of the Columbia Gorge by Jack Murdock.
Wetland Plants of Oregon and Washington, by Jennifer Guard
Northwest Weeds, by Ronald J. Taylor
Plants of the Lewis and Clark Expedition, by H. Wayne Phillips
On the web, there are some really bad ones and some really good ones (no surprise).
Wildflowers Likely to be Found in Oregon: http://www.paulnoll.com/Oregon/Wildflower/index.html
Wildflower Listing by State: http://uswildflowers.com/wfquery.php?State=ORE
For wildflower bloom status in the area: http://oregonwildflowers.org/index1024.html
Plus many other standard references run by the state, USDA, etc.
