Alan Cressler:
Amazon Creek, U.S. Geological Survey, PNSQA Sample Site, Eugene, Lane County, Oregon 1
Alan Cressler:
Amazon Creek, U.S. Geological Survey, PNSQA Sample Site, Eugene, Lane County, Oregon 2
Alan Cressler:
Ariolimax columbianus, along Woods Creek, Benton County, Oregon 1
Alan Cressler:
Ariolimax columbianus, along Woods Creek, Benton County, Oregon 2
Alan Cressler:
Ben Torrison, Sediment Sampling, Mohawk River, U.S. Geological Survey, PNSQA Sample Site, Lane County, Oregon 1
Alan Cressler:
Cleetwood Cove, Mount Mazama, Crater Lake National Park, Klamath County, Oregon 1
Alan Cressler:
Cleetwood Cove, with Pollen Plumes Crater Lake, Mount Mazama, view from Cleetwood Cove Trail, Crater Lake National Park, Klamath County, Oregon 1
Alan Cressler:
Corallorhiza maculata, Munson Valley, Crater Lake National Park, Klamath County, Oregon 1
Alan Cressler:
Corallorhiza mertensiana, Munson Valley, Crater Lake National Park, Klamath County, Oregon 2
Alan Cressler:
Corallorhiza mertensiana, Munson Valley, Crater Lake National Park, Klamath County, Oregon 3
Alan Cressler:
Corallorhiza mertensiana, Munson Valley, Crater Lake National Park, Klamath County, Oregon 4
Alan Cressler:
Crater Lake, and Pumice Castle, Mount Mazama, view from Pumice Castle Overlook, Crater Lake National Park, Klamath County, Oregon 1
Alan Cressler:
Crater Lake, Mount Mazama, view from Cloudcap Overlook, Crater Lake National Park, Klamath County, Oregon 1
Alan Cressler:
Crater Lake, Mount Mazama, view from Pumice Castle Overlook, Crater Lake National Park, Klamath County, Oregon 1
Alan Cressler:
Crater Lake, Mount Mazama, view from Sentinel Rock Overlook, Crater Lake National Park, Klamath County, Oregon 1
Alan Cressler:
Dicamptodon tenebrosus (paedomorphic adult), Camp Creek, Lane County, Oregon
Alan Cressler:
Dicamptodon tenebrosus (paedomorphic adult), Camp Creek, Lane County, Oregon 2
Alan Cressler:
Dicamptodon tenebrosus (paedomorphic adult), Camp Creek, Lane County, Oregon 3
Alan Cressler:
Dicamptodon tenebrosus (possible paedomorphic adult) , gulping air, Woods Creek, Benton County, Oregon 1
Alan Cressler:
Dicamptodon tenebrosus (possible paedomorphic adult) , Woods Creek, Benton County, Oregon 1
Alan Cressler:
Dicamptodon tenebrosus (possible paedomorphic adult) , Woods Creek, Benton County, Oregon 2
Alan Cressler:
Earnest Bridge, Built 1938, Paschelke Road, Mohawk River, U.S. Geological Survey, PNSQA Sample Site, Lane County, Oregon 1
Alan Cressler:
Electrofishing, Amazon Creek, U.S. Geological Survey, PNSQA Sample Site, Eugene, Lane County, Oregon, (L to R), Casie Smith, Amanda Bell, and David Piatt 1
Alan Cressler:
Electrofishing, Mohawk River, U.S. Geological Survey, PNSQA Sample Site, Lane County, Oregon (L to R), Amanda Bell, David Piatt, Casie Smith 1
Alan Cressler:
Elowah Falls, John B. Yeon State Park, Columbia River National Scenic Area, Multnomah County, Oregon 1
Alan Cressler:
Equisetum telmateia, Gibson Creek, Brush College City Park, Salem, Polk County, Oregon 1
Alan Cressler:
Equisetum telmateia, Gibson Creek, Brush College City Park, Salem, Polk County, Oregon 2
Alan Cressler:
Juga plicifera or Juga silicula, Gibson Creek, Brush College City Park, Salem, Polk County, Oregon 1
Alan Cressler:
Juga silicula (possible identification), Woods Creek, Benton County, Oregon 1
Alan Cressler:
Lilium columbianum, Columbia River Gorge, Ainsworth State Park, Columbia River Gorge National Scenic Area, Multnomah County, Oregon 1
