Sandbar, Thjorsa River, Iceland, June 26, 1972

Redbud Tree in Bottom Land, Red River Gorge, Kentucky

Bitterroot on Cinders, Craters of the Moon [National Monument], Idaho, July 2, 1975

Wet Leaves in Rain, Great Spruce Head Island, Maine, July 1954

Dead Leaves and Pine Needles, Swift Camp Creek, Red River Gorge, Kentucky, April 19, 1968

Ferns and Rocks, Maine, August 1942

Spruce Trees and Bay Bushes, Great Spruce Head Island, Maine, July 6, 1968

Wild Roses and Raspberry, Great Spruce Head Island, Maine, July 24, 1968

Wild Roses and Raspberry, Great Spruce Head Island, Maine, July 24, 1968

Red Soldier Lichen, Great Spruce Head Island, Maine, June 7, 1969

Dandelions on Bear Island Beach, Bear Island, Maine, July 15, 1968

Orange Lichen and Black Algae, Great Spruce Head Island, Maine, June 16, 1969

Lichen-covered Log, Great Spruce Head Island, Maine, July 5, 1969

Lobster Pots, Sunshine, Deer Isle, Maine, July 12, 1969

Pink and Blue Lichen Wheels, Great Spruce Head Island, Maine, July 2, 1971

Seaweed and Rock, Great Spruce Head Island, Maine, July 15, 1971

Dead Spruce Trunk, Great Spruce Head Island, Maine, July 1, 1969

Gravel Bar, Brimstone Island, Maine, July 16, 1969

Lichen and Plantains, Hard Head Island, Maine, July 26, 1969

Gray and Brown Schist, Little Spruce Head Island, Maine, July 27, 1969