 Lower (flat) part of Juniper Canyon Trail. Big Bend National Park, Texas, November 23, 2007
 Northeast Rim, view from lower part of Juniper Canyon Trail. Big Bend National Park, Texas, November 23, 2007
 Crown Mountain, view from lower part of Juniper Canyon Trail. Big Bend National Park, Texas, November 23, 2007
 Camping on a small ridge near Juniper Canyon Trail south from Upper Juniper Spring. Big Bend National Park, Texas, November 22, 2007
 Prickly pears cactus on a small ridge near Juniper Canyon Trail south from Upper Juniper Spring. Big Bend National Park, Texas, November 22, 2007
 Boot Rock, view from Juniper Canyon Trail. Big Bend National Park, Texas, November 23, 2007
 Echinocactus horizonthalonius (devil s head cactus, or horse crippler) with daggerlike spines on a small ridge near Juniper Canyon Trail south from Upper Juniper Spring. Big Bend National Park, Texas, November 22, 2007
 Upper part of Boot Canyon Trail. Big Bend National Park, November 27, 2009
 Upper part of Boot Canyon. Big Bend National Park, November 27, 2009
 Cacti on east part of Dodson Trail. Big Bend National Park, Texas, November 23, 2007
 Weathered wood on Pinnacles Trail near Juniper Flat. Big Bend National Park, Texas, November 22, 2007
 Sotol and Southeast Rim, view from east part of Dodson Trail. Big Bend National Park, Texas, November 23, 2007
 Cane Cholla cactus and Southeast Rim, view from east part of Dodson Trail. Big Bend National Park, Texas, November 23, 2007
 Canyon of Smokey Creek. Big Bend National Park, Texas, November 25, 2007
 Santa Elena Canyon west from Smokey Creek Trail east from Mule Ear Spring. Big Bend National Park, Texas, November 25, 2007
 Purple-tinged prickly pear cactus in the middle part of Smokey Creek Trail. Big Bend National Park, Texas, November 25, 2007
 Dead juniper on Devils Hall Trail in Pine Spring Canyon. Guadalupe Mountains National Park, Texas, December 28, 2007
 Bark of alligator juniper in McKittrick Canyon. Guadalupe Mountains National Park, Texas, December 28, 2007
 Upper section of Boot Canyon Trail. Big Bend National Park, November 27, 2009
 Boot Canyon Trail ending at Southeast Rim. Big Bend National Park, November 27, 2009
 Wide part of lower canyon of Nahal Tsafit Creek, 2 miles south-east from Arava junction. The Middle East, November 29, 2001
 Wide part of lower canyon of Nahal Tsafit Creek, 2 miles south-east from Arava junction. The Middle East, November 29, 2001
 Emory Peak from lower section of Southwest Rim Trail. Big Bend National Park, November 28, 2009
 A skull shaped stone in a wide part of lower canyon of Nahal Tsafit Creek, 2 miles south-east from Arava junction. The Middle East, November 29, 2001
 A skull shaped stone in a wide part of lower canyon of Nahal Tsafit Creek, 2 miles south-east from Arava junction. The Middle East, November 29, 2001
 Dry juniper on South Rim. Big Bend National Park, November 28, 2009
 Eroded pinnacles of pink volcanic tuff looking like a miniature Bryce Canyon on Blue Creek Trail. Big Bend National Park, November 29, 2009
 Dry juniper tree on South Rim at morning. Big Bend National Park, November 29, 2009
 Agave on Smokey Creek Trail. Big Bend National Park, Texas, November 24, 2007
 Fall colors of Boot Canyon. Big Bend National Park, November 27, 2009
 Mule Ear Peaks from Smokey Creek Trail. Big Bend National Park, Texas, November 25, 2007
 Fresno Circle campsite near Dodson Trail at evening. Big Bend National Park, Texas, November 23, 2007
 Smokey Creek Trail north from Mule Ear Peaks. Big Bend National Park, Texas, November 25, 2007
 Smokey Creek Trail east from Mule Ear Spring. Big Bend National Park, Texas, November 25, 2007
 - Boot Canyon trail 11/28/97 morning (A trip to Big Bend Park, November 27 - 28, 1997)
 - Boot Canyon trail 11/28/97 morning (A trip to Big Bend Park, November 27 - 28, 1997)
 - Boot Canyon trail 11/28/97 morning (A trip to Big Bend Park, November 27 - 28, 1997)
 - Boot Canyon trail 11/28/97 morning (A trip to Big Bend Park, November 27 - 28, 1997)
 - Boot Canyon trail 11/28/97 morning (A trip to Big Bend Park, November 27 - 28, 1997)
 - Boot Canyon trail 11/28/97 morning (A trip to Big Bend Park, November 27 - 28, 1997)
 - Boot Canyon trail 11/28/97 morning (A trip to Big Bend Park, November 27 - 28, 1997)
 - Boot Canyon trail 11/28/97 morning (A trip to Big Bend Park, November 27 - 28, 1997)
 South Rim, view from Fresno Circle campsite near Dodson Trail. Big Bend National Park, Texas, November 23, 2007
 Ocotillo on Smokey Creek Trail north from Mule Ear Peaks. Big Bend National Park, Texas, November 25, 2007
 Dallas Sierra Club on Smokey Creek Trail at rain. Big Bend National Park, Texas, November 24, 2007
 Desert mistletoe(?) growing on ocotillo, view from Smokey Creek Trail. Big Bend National Park, Texas, November 25, 2007
 Pitaya(?) cactus on Smokey Creek Trail east from Mule Ear Spring. Big Bend National Park, Texas, November 25, 2007
 Bee Mountain, view to the west from Smokey Creek Trail near Mule Ear Spring. Big Bend National Park, Texas, November 25, 2007
 Elephant Tusk Rock, view from Fresno Spring near Dodson Trail. Big Bend National Park, Texas, November 24, 2007
 Smokey Creek Trail through creosote bushes and cacti east from Mule Ear Overlook. Big Bend National Park, Texas, November 25, 2007
 Goat Mountain, view to the north from Smokey Creek Trail near Mule Ear Spring. Big Bend National Park, Texas, November 25, 2007
 Valley of Smokey Creek, view to the east from a trail north from Mule Ear Peaks. Big Bend National Park, Texas, November 25, 2007
 Sandy washes of Blue Creek Canyon near Homer Wilson Ranch. Big Bend National Park, November 29, 2009
 Santa Elena Canyon and mountains in Mexico from SW3 (Southwest Rim) campsite at sunrise. Big Bend National Park, November 29, 2009
 Smokey Creek Trail near Trap Spring east from Mule Ear Overlook, view to the west. Big Bend National Park, Texas, November 25, 2007
 Drooping juniper (Juniperus flaccida Var. flaccida) on Southeast Rim. Big Bend National Park, November 28, 2009
 Pour-off of Smokey Creek. Big Bend National Park, Texas, November 25, 2007
 Ruins of Dodson Ranch. Big Bend National Park, Texas, November 23, 2007
 Fresno Spring at evening. Big Bend National Park, Texas, November 23, 2007
 Purple-tinged prickly pear cactus on Smokey Creek Trail near Trap Spring east from Mule Ear Overlook. Big Bend National Park, Texas, November 25, 2007
 Maiden ferns at Mule Ear Spring. Big Bend National Park, Texas, November 25, 2007
 Cactus on rocks of Smokey Creek. Big Bend National Park, Texas, November 25, 2007
 Trap Mountain(?) west from Smokey Creek Trail near Trap Spring east from Mule Ear Overlook. Big Bend National Park, Texas, November 25, 2007
 - Boot Canyon 11/27/97 evening (A trip to Big Bend Park, November 27 - 28, 1997)
 - Boot Canyon 11/27/97 evening (A trip to Big Bend Park, November 27 - 28, 1997)
 - Blue Creek Canyon (A trip to Big Bend Park, November 29 - 30, 1997)
 - Blue Creek Canyon (A trip to Big Bend Park, November 29 - 30, 1997)
 - Blue Creek Canyon (A trip to Big Bend Park, November 29 - 30, 1997)
 - Boot Canyon 11/27/97 evening (A trip to Big Bend Park, November 27 - 28, 1997)
 - Boot Canyon 11/27/97 evening (A trip to Big Bend Park, November 27 - 28, 1997)
 - Boot Canyon 11/27/97 evening (A trip to Big Bend Park, November 27 - 28, 1997)
 - Boot Canyon 11/27/97 evening (A trip to Big Bend Park, November 27 - 28, 1997)
 - Boot Canyon 11/27/97 evening (A trip to Big Bend Park, November 27 - 28, 1997)
 - Boot Canyon 11/27/97 evening (A trip to Big Bend Park, November 27 - 28, 1997)
 - Blue Creek Canyon (A trip to Big Bend Park, November 29 - 30, 1997)
 Chisos Mountains with snow, view from Castalon Highway. Big Bend National Park, Texas, November 25, 2007
 Century plant and Elephant Tusk Mountain, view from South Rim. Big Bend National Park, Texas, November 22, 2007
 Mule Ear Peaks east from Smokey Creek Trail east from Mule Ear Overlook. Big Bend National Park, Texas, November 25, 2007
 Agave on McKittrick Canyon Trail. Guadalupe Mountains National Park, Texas, December 28, 2007
 Chisos Mountains with traces of snow, view from Castalon Highway (Ross Maxwell Scenic Drive). Big Bend National Park, Texas, November 25, 2007
 Alligator juniper (Juniperus deppeana) near El Capitan Trail. Guadalupe Mountains National Park, Texas, December 27, 2007
 Slopes of Frijole Mountain from McKittrick Canyon Trail. Guadalupe Mountains National Park, Texas, December 28, 2007
 Rocks on Devils Hall Trail in Pine Spring Canyon. Guadalupe Mountains National Park, Texas, December 28, 2007
 Hiker s staircase in Pine Spring Canyon, on Devils Hall Trail. Guadalupe Mountains National Park, Texas, December 28, 2007
 Ramaria mushroom on a lower part of rotten pine log on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, February 12, 2023
 Peeling bark of Texas madrone on Devils Hall Trail in Pine Spring Canyon. Guadalupe Mountains National Park, Texas, December 28, 2007
 Texas madrone (Arbutus xalapensis) on Devils Hall Trail in Pine Spring Canyon. Guadalupe Mountains National Park, Texas, December 28, 2007
 Alligator juniper north from Capulin Canyon in Bandelier National Monument. New Mexico, near Los Alamos, May 24, 2008
 Smooth white bark of Texas madrone on Devils Hall Trail in Pine Spring Canyon. Guadalupe Mountains National Park, Texas, December 28, 2007
 Lake in north part of Bastrop State Park, view from Road 1C. Bastrop, Texas, November 4, 2007
 Spores of Ramaria mushroom from lower part of rotten pine log collected on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, February 12, 2023
 Drying juniper twig north from Capulin Canyon in Bandelier National Monument. New Mexico, near Los Alamos, May 24, 2008
 Grotto in McKittrick Canyon, with icicles. Guadalupe Mountains National Park, Texas, December 28, 2007
 Basidia and spores of Ramaria mushroom from lower part of rotten pine log under a microscope, collected on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, February 12, 2023
 Tissues of Ramaria mushroom from lower part of rotten pine log under a microscope in Congo Red, collected on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, February 12, 2023
 Hunter Line Cabin in McKittrick Canyon. Guadalupe Mountains National Park, Texas, December 28, 2007
 Devil s Hall in Pine Spring Canyon. Guadalupe Mountains National Park, Texas, December 28, 2007
 Warped crust fungus Serpula himantioides(?) on a lower part of a large pine log on Little Lake Creek Loop Trail east from Trailhead No. 4 in Sam Houston National Forest, near Montgomery. Texas, January 2, 2021
 Thin ash-like corticioid fungus on lower part of a thick pine log in wet area on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, December 9, 2023
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