Ordway Prairie, South Dakota, August 1978

Steps in Greek Theater, Syracuse, Sicily, March 18, 1967

Lichens on Rocks, Barred Islands, Maine, August 5, 1944

Indian Pipes, Great Spruce Head Island, Maine, August 1, 1954

Cobweb and Moss, Maine, August 1942

Everlastings, Peaks Island, Maine, August 13, 1944

Rusty Chain, Great Spruce Head Island, Maine, August 15, 1944

Fungus on Log, Great Spruce Head Island, Maine, July 25, 1949

Mountain and Gravel Flood Plain, Landmannalaugar, Iceland, June 29, 1972

Turf and Pebbles Behind Skogar, Iceland, July 5, 1972

Pyroclastic Lava, Hitardalur, Eastern Snaefellsnes, Iceland, July 10 ,1972

Flowering Heath, Myvatn, Iceland, July 21, 1972

Ice in Glacial Lake, Fjnllsarlon, South Coast, Iceland, August 1, 1972

Mud Pot, Mývatn, Iceland, July 23, 1972

Orange Lichen, Dimmuborgir, Mývatn, Iceland, July 26, 1972

Lichen on Cracked Rock, Fjardharheidhi, Road to Seydharfjordhur, Iceland, July 29, 1972

Pinks, Fjardharheidhi, Seydharfjordhur, Iceland, July 29, 1972

Bluets, Red River Gorge, Kentucky, April 17, 1968

Bluets, Red River Gorge, Kentucky, April 17, 1968

Lupin and Grass, Craters of the Moon [National Monument], Idaho, July 3, 1975