 Dogwood in a forest on Ridge Trail east Trailpoint 13 in Sourland Mountain Preserve. Somerset County, New Jersey, May 6, 2007
 Showy Orchis (Galearis spectabilis) orchid wildflower on Ridge Trail above Trailpoint 1 in Sourland Mountain Preserve. Somerset County, New Jersey, May 6, 2007
 Blooming garlic mustard carpeting forest near Red Trail in Six Mile Run Reservoir. Somerset, New Jersey, May 6, 2007
 An old car on Red Trail in Six Mile Run Reservoir, near Cross Brook. Somerset, New Jersey, April 29, 2007
 Yellow Trail in Six Mile Run Reservoir, after flooding. Somerset, New Jersey, April 29, 2007
 Blue Trail in Six Mile Run Reservoir, approaching Blackwell Mills Road. Somerset, New Jersey, April 29, 2007
 Appalachian Trail near Rattlesnake Mountain. Delaware Water Gap, New Jersey, May 12, 2007
 Blooming oak on Appalachian Trail south from Rattlesnake Mountain. Delaware Water Gap, New Jersey, May 12, 2007
 Oaks on Appalachian Trail south from Rattlesnake Mountain. Delaware Water Gap, New Jersey, May 12, 2007
 Stones on Appalachian Trail south from Rattlesnake Mountain. Delaware Water Gap, New Jersey, May 12, 2007
 Appalachian Trail on a ridge of Kittatinny Mountains. Delaware Water Gap, New Jersey, May 12, 2007
 A snake on a trail south from Mountain Lakes in John Witherspoon Woods park. Princeton, New Jersey, April 28, 2007
 A deer on Linear Park Trail (former railroad) in Cook Natural Area, near Ridge Road. Kingston, New Jersey, May 11, 2007
 A small flower on Mount Rose Ridge Trail in Stony Brook Watershed park. Pennington, New Jersey, April 29, 2007
 View to the west from Rattlesnake Mountain. Delaware Water Gap, New Jersey, May 12, 2007
 Walpack Valley from Rattlesnake Mountain. Delaware Water Gap, New Jersey, May 12, 2007
 View of Manhattan from High Mountain. Paterson, New Jersey, March 25, 2007
 Prismatic rocks in High Mountain Park. Paterson, New Jersey, March 25, 2007
 A small creek near Mountain Road in Delaware Water Gap. New Jersey, March 3, 2007
 Walpack Valley, view from Mountain Road. Delaware Water Gap, New Jersey, May 12, 2007
 Garlic mustard and cut leaf toothwort in background on Mount Rose Ridge Trail in Stony Brook Watershed park. Pennington, New Jersey, April 29, 2007
 A farm in Walpack Valley, view from Mountain Road. Delaware Water Gap, New Jersey, May 12, 2007
 Frozen Buttermilk Falls on Mountain Road in Delaware Water Gap. New Jersey, March 3, 2007
 May apple leaf growing through a dry leaf on Mount Rose Ridge Trail in Stony Brook Watershed park. Pennington, New Jersey, April 29, 2007
 A creek south from Wallpack Center, view from Mountain Road. Delaware Water Gap, New Jersey, March 3, 2007
 A farm west from Hidden Falls, view from Mountain Road. Delaware Water Gap, New Jersey, March 3, 2007
 Crossing of Mountain and Brink roads east from Wallpack Center. Delaware Water Gap, New Jersey, March 3, 2007
 A stream south from Wallpack Center, view from Mountain Road. Delaware Water Gap, New Jersey, March 3, 2007
 Concrete remains south from Mountain Lakes in John Witherspoon Woods park. Princeton, New Jersey, April 27, 2007
 Skunk cabbage on pipeline right of way crossing a creek in Mountain Lakes North park. Princeton, New Jersey, April 27, 2007
 Leaves of skunk cabbage on pipeline right of way crossing a creek in Mountain Lakes North park. Princeton, New Jersey, April 27, 2007
 Leaves of skunk cabbage on pipeline right of way crossing a creek north from Mountain Lakes in John Witherspoon Woods park. Princeton, New Jersey, April 27, 2007
 View to the south from south side of Mountain Lakes in John Witherspoon Woods park. Princeton, New Jersey, April 28, 2007
 El Capitan Mountain from a trail at the foot of the mountain. Guadalupe Mountains National Park, Texas, December 27, 2007
 Mountain laurel flowers on Blue Trail in DeSoto State Park on Lookout Mountain. Fort Payne, Alabama, May 19, 2007
 Quail Trail in Abram S. Hewitt State Forest. West Millford, New Jersey, April 21, 2007
 El Capitan Mountain from southern foot of the mountain. Guadalupe Mountains National Park, Texas, December 27, 2007
 Torques Trail near Dunnfield Creek, Worthington State Forest. Delaware Water Gap, New Jersey, March 31, 2007
 A boat in a forest near a trail of Delaware and Raritan Canal State Park north from Kingston. New Jersey, April 19, 2007
 View of Fox Island in Greenwood Lake from Quail Trail in Abram S. Hewitt State Forest. West Millford, New Jersey, April 21, 2007
 A tulip on a trail descending from a mountain ridge to Yeroham reservoir. The Middle East, March 8, 2001
 A tulip on a trail descending from a mountain ridge to Yeroham reservoir. The Middle East, March 8, 2001
 Tulips on a trail descending from a mountain ridge to Yeroham reservoir. The Middle East, March 8, 2001
 View of hills near Yeroham from a trail from a damn to the mountain ridge. The Middle East, March 8, 2001
 Spring desert near a trail descending from a mountain ridge to Yeroham reservoir. The Middle East, March 8, 2001
 El Capitan Mountain at sunset, view from lower Roadside Park south from the mountain. Guadalupe Mountains National Park, Texas, December 28, 2007
 Parasitic plants in Beartrap Meadow County Park on Casper Mountain. Wyoming, July 21, 2010
 Dwarf sunflowers (Old-man-of-the-mountain, Rydbergia grandiflora, Hymenoxys grandiflora) on a slope of Colony Baldy Mountain in Sangre de Cristo Mountains. Colorado, July 3, 2007
 A tulip and wild onions (?) on a trail descending from a mountain ridge to Yeroham reservoir. The Middle East, March 8, 2001
 Spring flowers in a riverbed near a trail descending from a mountain ridge to Yeroham reservoir. The Middle East, March 8, 2001
 A dwarf iris in Negev Desert on a trail descending from a mountain ridge to Yeroham reservoir. The Middle East, March 8, 2001
 Spring flowers among rocks in a riverbed near a trail descending from a mountain ridge to Yeroham reservoir. The Middle East, March 8, 2001
 Yellow coralroot (Corallorhiza trifida) in Beartrap Meadow County Park on Casper Mountain. Wyoming, July 21, 2010
 Sulphur Flower (Eriogonum umbellatum) in Beartrap Meadow County Park on Casper Mountain. Wyoming, July 21, 2010
 Appalachian Trail above Sunfish Pond. Delaware Water Gap, New Jersey, March 31, 2007
 Torques Trail near Dunnfield Creek. Delaware Water Gap, New Jersey, March 31, 2007
 Participants of Quantum Summer School conference visiting Beartrap Meadow County Park on Casper Mountain. Wyoming, July 21, 2010
 A trail in Delaware and Raritan Canal State Park. Princeton, New Jersey, March 23, 2007
 A trail in Delaware and Raritan Canal State Park. Kingston, New Jersey, March 28, 2007
 El Capitan Mountain from a trail in Guadalupe Mountains National Park. Texas, December 27, 2007
 El Capitan Trail and Mountain in Guadalupe Mountains National Park. Texas, December 27, 2007
 El Capitan Mountain and Trail in Guadalupe Mountains National Park. Texas, December 27, 2007
 A creek in hardwood forest in John Witherspoon Woods park. Princeton, New Jersey, April 27, 2007
 Gaywings flower (fringed polygala) on Buttermilk Falls Trail. Delaware Water Gap, New Jersey, May 12, 2007
 Tracks on a trail of Delaware and Raritan Canal State Park. Kingston, New Jersey, February 26, 2007
 View of Brooklyn NY from a trail north from parking area M. Sandy Hook, New Jersey, February 11, 2007
 A trail in Delaware and Raritan Canal State Park north from Kingston. New Jersey, February 24, 2007
 Snowy trail in Delaware and Raritan Canal State Park. Kingston, New Jersey, February 21, 2007
 Agaves and El Capitan Mountain from a trail in Guadalupe Mountains National Park. Texas, December 27, 2007
 A flooding in a forest around Extended Stay America hotel at Road 1. South Brunswick, New Jersey, April 15, 2007
 Flooded forest near Extended Stay America hotel at Road 1. South Brunswick, New Jersey, April 15, 2007
 Mountain mint (Pycnanthemum) on Kirby Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Cushion cactus and El Capitan Mountain from a trail in Guadalupe Mountains National Park. Texas, December 27, 2007
 Agave, cacti and El Capitan Mountain from a trail in Guadalupe Mountains National Park. Texas, December 27, 2007
 A forest near Devil s Cave near northern entrance of John Witherspoon Woods park. Princeton, New Jersey, April 28, 2007
 Tachinid(?) fly on Mountain mint (Pycnanthemum) on Kirby Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Sweet gum fruits in snow on a trail in Delaware and Raritan Canal State Park. Princeton, New Jersey, February 20, 2007
 Laurel Falls near Orange Trail in DeSoto State Park on Lookout Mountain. Fort Payne, Alabama, May 19, 2007
 Lost Falls near Blue Trail in DeSoto State Park on Lookout Mountain. Fort Payne, Alabama, May 19, 2007
 Slopes of Frijole Mountain from McKittrick Canyon Trail. Guadalupe Mountains National Park, Texas, December 28, 2007
 Narrowleaf mountain mint (Pycnanthemum tenuifolium) on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Trout lilies on Meadow Trail in Stony Brook - Millstone Watershed Main Reserve. Pennington, New Jersey, April 28, 2007
 View of a slope of Colony Baldy Mountain from Macey Lakes Trail in Sangre de Cristo Mountains. Colorado, July 2, 2007
 Bee Mountain, view to the west from Smokey Creek Trail near Mule Ear Spring. Big Bend National Park, Texas, November 25, 2007
 Crown Mountain, view from lower part of Juniper Canyon Trail. Big Bend National Park, Texas, November 23, 2007
 A field of skunk cabbage in morning mist in hardwood forest in John Witherspoon Woods park. Princeton, New Jersey, April 28, 2007
 View of a mountain ridge behind Yeroham reservoir. The Middle East, March 8, 2001
 View from a mountain ridge behind Yeroham reservoir. The Middle East, March 8, 2001
 A canada goose on eggs near a trail near Carnegie Lake in Delaware and Raritan Canal State Park. Kingston, New Jersey, April 18, 2007
 Flooding of a trail in Delaware and Raritan Canal State Park, view from Road 27 crossing to the north. Kingston, New Jersey, April 16, 2007
 Turquois pool of Bee Creek near Wolf Mountain Trail in Pedernales Falls State Park. Johnson City, Texas, November 10, 2007
 Goat Mountain, view to the north from Smokey Creek Trail near Mule Ear Spring. Big Bend National Park, Texas, November 25, 2007
 Bedouin sheep on a mountain ridge behind Yeroham reservoir. The Middle East, March 8, 2001
 A canada goose (zoomed) nesting on a trail near Carnegie Lake in Delaware and Raritan Canal State Park. Kingston, New Jersey, April 18, 2007
 Canada goose nest with eggs on a trail near Carnegie Lake in Delaware and Raritan Canal State Park. Kingston, New Jersey, April 18, 2007
 View of a heavily polluted Yeroham reservoir from a mountain ridge. The Middle East, March 8, 2001
 A tulip in Negev Desert, on a mountain ridge behind Yeroham reservoir. The Middle East, March 8, 2001
 Red anemone (adonis?) flower on a mountain ridge behind Yeroham reservoir. The Middle East, March 8, 2001
 A tulip in Negev Desert, on a mountain ridge behind Yeroham reservoir. The Middle East, March 8, 2001
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