Alan Cressler:
Acarospora chrysops, Altamaha Formation sandstone outcrop, Broxton Rocks, Broxton Rocks Preserve, The Nature Conservancy, Coffee County, Georgia 1
Alan Cressler:
Acarospora contigua (possible identification), Cedar Mountain, Douglas County, Georgia 1
Alan Cressler:
Acarospora contigua, Big South Fork National Scenic River and Recreation Area, Scott County, Tennessee 1
Alan Cressler:
Acarospora contigua, Emerald Mountain, Glacier Basin, Rocky Mountain National Park, Larimer County, Colorado 1
Alan Cressler:
Acarospora piedmontensis, Davidson-Arabia Mountain Nature Preserve, Dekalb County, Georgia 2
Alan Cressler:
Buellia spuria, Lake Burton Dunite Ridge, Chattahoochee National Forest, Rabun County, Georgia 1
Alan Cressler:
Buellia spuria, Lake Burton Dunite Ridge, Chattahoochee National Forest, Rabun County, Georgia 2
Alan Cressler:
Buellia spuria, Lake Burton Dunite Ridge, Chattahoochee National Forest, Rabun County, Georgia 3
Alan Cressler:
Caloplaca cinnabarina, Bald Rock Ridge, Cheaha State Park, CCC Trail, Cleburne County, Alabama 2
Alan Cressler:
Caloplaca cinnabarina, Bald Rock Ridge, Cheaha State Park, CCC Trail, Cleburne County, Alabama 9
Alan Cressler:
Caloplaca cinnabarina, Pine Mountain, Sprewell Bluff Wildlife Managemet, Meriwether County, Georgia 1
Alan Cressler:
Caloplaca cinnabarina, Pine Mountain, Sprewell Bluff Wildlife Managemet, Meriwether County, Georgia 2
Alan Cressler:
Caloplaca cinnabarina, Stone Mountain, south side, Dekalb County, Georgia 1
Alan Cressler:
Cetradonia linearis, Chattahoochee National Forest, Rabun County, Georgia 1
Alan Cressler:
Cetradonia linearis, Chattahoochee National Forest, Rabun County, Georgia 1
Alan Cressler:
Cetradonia linearis, Chattahoochee National Forest, Rabun County, Georgia 1
Alan Cressler:
Cetradonia linearis, Chattahoochee National Forest, Rabun County, Georgia 1 3
Alan Cressler:
Cetradonia linearis, Chattahoochee National Forest, Rabun County, Georgia 1 5
Alan Cressler:
Cetradonia linearis, Chattahoochee National Forest, Rabun County, Georgia 2
Alan Cressler:
Cetradonia linearis, Chattahoochee National Forest, Rabun County, Georgia 3
Alan Cressler:
Cetradonia linearis, Chattahoochee National Forest, Rabun County, Georgia 4
Alan Cressler:
Cetradonia linearis, Raven Fork, Raven Fork Gorge, Great Smoky Mountains National Park, Swain County, North Carolina 1
Alan Cressler:
Cetradonia linearis, desiccated, Chattahoochee National Forest, Rabun County, Georgia 1
Alan Cressler:
Cetradonia linearis, habitat, Chattahoochee National Forest, Rabun County, Georgia 1
Alan Cressler:
Chrysothrix species, Arabia Mountain, Davidson-Arabia Mountain Nature Preserve, Dekalb County, Georgia 1
Alan Cressler:
Cladia retipora, Kauaeranga Kauri Trail, Coromandel Range, Coromandel Forest Park, Thames-Coromandel District, Waikato, New Zealand 1
Alan Cressler:
Cladia retipora, Kauaeranga Kauri Trail, Coromandel Range, Coromandel Forest Park, Thames-Coromandel District, Waikato, New Zealand 2
Alan Cressler:
Cladonia caroliniana, Cedar Mountain, Douglas County, Georgia 1
Alan Cressler:
Cladonia caroliniana, Cedar Mountain, Douglas County, Georgia 2
Alan Cressler:
Cladonia caroliniana, Little Arabia Mountain, Davidson-Arabia Mountain Nature Preserve, Dekalb County, Georgia 1
