Plants

PNW Wildflowers

Turner Photographs

Bugs

Bees of Portland

Xerces Society

Portland Butterfly Pocket Guide

Portland Parks & Rec

Slugs and Snails of Oregon

Oregon Dept of Agriculture

Butterflies of Oregon

Neil Bjorklund

Maps

Hisorical Vegetation of the Willamette Valley (c. 1850)

John A. Christy & Edward R. Alverson