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Vascular Plants of Montana
Arizona Flora
Cataclysms on the Columbia
Marin Flora
A Field Manual of the Ferns & Fern-Allies of the United States & Canada
A Field Guide To The Plants of Arizona
Manual of Vascular Plants of Northeastern United States and Adjacent Canada
Fire Mountains of the West
Deepest Valley: A Guide to Owens Valley, Its Roadsides and Mountain Trails
The Jepson Manual. Higher Plants of California
Flora of the Pacific Northwest
Northwest Exposures. A Geologic Story of the Northwest
Alpine Wildflowers of the Rocky Mountains
Wyoming Mountain Ranges
Flora of Steens Mountain
Alpine and Subalpine Vegetation of the Wallowa, Seven Devils and Blue Mountains
The Plants of Pennsylvania: An Illustrated Manual
Sierra Birds - A Hiker's Guide
A Utah Flora
Smithsonian Handbooks Birds of North America Western Region