Alan Cressler:
Algae and Oxygen, Spring Creek, Jackson County, Florida 2
Alan Cressler:
algae colony st marks national wildlife refuge wakulla co fl small prairie 1
Alan Cressler:
Gratiola amphiantha, Arabia Mountain, Davidson-Arabia Mountain Nature Preserve, Dekalb County, Georgia 3
Alan Cressler:
Gratiola amphiantha, Arabia Mountain, Davidson-Arabia Mountain Nature Preserve, Dekalb County, Georgia 4
Alan Cressler:
Gratiola amphiantha, Arabia Mountain, Davidson-Arabia Mountain Nature Preserve, DeKalb County, Georgia 5
Alan Cressler:
Gratiola amphiantha, Camp Meeting Rock, Camp Meeting Rock Preserve, The Nature Conservancy, Heard County, Georgia 1
Alan Cressler:
Gratiola amphiantha, Camp Meeting Rock, Camp Meeting Rock Preserve, The Nature Conservancy, Heard County, Georgia 2
Alan Cressler:
Gratiola amphiantha, Heggie's Rock, Heggie's Rock Preserve, The Nature Conservancy, Columbia County, Georgia 1
Alan Cressler:
Brasenia schreberi, Originally from Toombs County, Georgia, Pond No. 1, Decatur, DeKalb County, Georgia 2
Alan Cressler:
Callitriche heterophylla, DeSoto Falls, DeSota State Park, Lookout Mountain, DeKalb County, Alabama 2
Alan Cressler:
Didymosphenia geminata, Smith River, below Philpott Dam, Franklin and Henry Counties, Virginia 1
Alan Cressler:
Didymosphenia geminata, Smith River, below Philpott Dam, Franklin and Henry Counties, Virginia 2
Alan Cressler:
Didymosphenia geminata, Smith River, below Philpott Dam, Franklin and Henry Counties, Virginia 3
Alan Cressler:
Didymosphenia geminata, Smith River, below Philpott Dam, Franklin and Henry Counties, Virginia 4
Alan Cressler:
Egeria densa (back ground), Potamogeton crispus (middle), Myriophyllum species (bottom), Chattahoochee River, above Johnson's Ferry Road, Cobb and Fulton Counties, Georgia 1
Alan Cressler:
Egeria densa, Chattahoochee River, above Johnson's Ferry Road, Cobb and Fulton Counties, Georgia 2
Alan Cressler:
Egeria densa, Chattahoochee River, above Johnson's Ferry Road, Cobb and Fulton Counties, Georgia 3
Alan Cressler:
Eleocharis equisetoides (possible identification), Pond RND 80, St. Marks National Wildlife Refuge, Wakulla County, Florida 1
Alan Cressler:
Eriocaulon compressum, Talpoideum Pond, St. Marks National Wildlife Refuge, Wakulla County, Florida 1
Alan Cressler:
Gratiola amphiantha, Davidson-Arabia Mountain Nature Preserve, DeKalb County, Georgia 1
Alan Cressler:
Gratiola amphiantha, Davidson-Arabia Mountain Nature Preserve, DeKalb County, Georgia 2
Alan Cressler:
iris virginica, green canoe trail, durdin prairie, okefenokee national wildlife refuge, charlton county, georgia 1
Alan Cressler:
iris virginica, green canoe trail, durdin prairie, okefenokee national wildlife refuge, charlton county, georgia 4
Alan Cressler:
Isoetes lacustris, and Elliptio complanata, Piseco Lake, Little Sand Point State Campground, Adirondack Park, Hamilton County, New York 1
Alan Cressler:
Isoetes lacustris, Piseco Lake, Little Sand Point State Campground, Adirondack Park, Hamilton County, New York 1
Alan Cressler:
Isoetes lacustris, Piseco Lake, Little Sand Point State Campground, Adirondack Park, Hamilton County, New York 3
Alan Cressler:
Isoetes melanospora, and Gratiola amphiantha, Arabia Mountain, Davidson-Arabia Mountain Nature Preserve, DeKalb County, Georgia 1
Alan Cressler:
Isoetes melanospora, and Gratiola amphiantha, Camp Meeting Rock, Camp Meeting Rock Preserve, The Nature Conservancy, Heard County, Georgia 1
Alan Cressler:
Isoetes melanospora, and Gratiola amphiantha, Camp Meeting Rock, Camp Meeting Rock Preserve, The Nature Conservancy, Heard County, Georgia 2
Alan Cressler:
Isoetes melanospora, Camp Meeting Rock, Camp Meeting Rock Preserve, The Nature Conservancy, Heard County, Georgia 1
