Calla Lily, Campbell, California, 2000
Tulips, Skagit County, Washington, 2000
Tulip Field 2, Skagit County, Washington, 2000
Tulip Field 3, Skagit County, Washington, 2000
Highway 20, Washington, 2000
Lichen 1, Dry Falls Visitor Center, Washington, 2000
Lichen 2, Dry Falls Visitor Center, Washington, 2000
Campbell Avenue at Castro Street, Campbell, California, 2000
Trees, Silver City, Utah, 2000
Lichen, Highway 550 North of Silverton, Colorado, 2000
Highway 16 Near Llano, Texas, 2000
Lichen, Los Banos, California, 1994
Moss, Modoc County, California, 1995
Wildflowers, Modoc County, California, 1995
Roots, Contra Costa County, California, 1995
Log, Canterbury, New Hampshire, 1995
Bristlecone pine, marker 3A, Shulman Grove, Inyo National Forest, California, 1995
Bristlecone pine, marker 4, Shulman Grove, Inyo National Forest, California, 1995
Roots, Livermore, California, 1996
Fence, Pescadero, California, 1996
Flowering tree, Pittsburg, California, 1996
Lichen, Glacier National Park, Montana, 1996
Juniper, University of New Mexico, Gallup, New Mexico, 1996
Pine tree, Point Lobos, California, 1997
Purple, Mountain View, California, 1992
Laceleaf Maple, Hoyt Arboretum, Portland, Oregon, 2015
Trees, Fitzgerald Marine Reserve, California, 1993
Root, Stockholm, Sweden, 1990
