Alan Cressler:
Algae, Collins River, Grundy County, Tennessee 1
Alan Cressler:
Caulerpa racemosa, Cinnamon Cay, Coral Reef, Cinnamon Bay, Virgin Islands National Park, Saint John, U.S. Virgin Islands 1
Alan Cressler:
Colonial Algae, Hiwassee River, Cherokee National Forest, Polk County, Tennessee 1
Alan Cressler:
Colonial Algae, Hiwassee River, Cherokee National Forest, Polk County, Tennessee 2
Alan Cressler:
Colonial Algae, Hiwassee River, Cherokee National Forest, Polk County, Tennessee 3
Alan Cressler:
Colonial Algae, Hiwassee River, Cherokee National Forest, Polk County, Tennessee 4
Alan Cressler:
Colonial Algae, Hiwassee River, Cherokee National Forest, Polk County, Tennessee 5
Alan Cressler:
Colonial Algae, Hiwassee River, Cherokee National Forest, Polk County, Tennessee 6
Alan Cressler:
Fucus distichus, Wedding Rocks Flats, Olympic National Park, and Flattery Rocks National Wildlife Refuge, Clallam County, Washington 1
Alan Cressler:
Fucus distichus, Wedding Rocks Flats, Olympic National Park, and Flattery Rocks National Wildlife Refuge, Clallam County, Washington 2
Alan Cressler:
Isoetes tennesseensis, and Colonial Algae, Hiwassee River, Cherokee National Forest, Polk County, Tennessee 1
Alan Cressler:
Isoetes tennesseensis, and Colonial Algae, Hiwassee River, Cherokee National Forest, Polk County, Tennessee 2
Alan Cressler:
Macrocystis pyrifera, Needle Rock Flats, Olympic National Park, and Flattery Rocks National Wildlife Refuge, Clallam County, Washington 1
Alan Cressler:
Padina jamaicensis, South Haulover Bay, Reef, Virgin Islands National Park, Saint John, U.S. Virgin Islands 1
Alan Cressler:
Thalassia testudinum, and Avrainvillea species, Rendezvous Bay, Saint John, U.S. Virgin Islands 1