 Mule Ear Peaks east from Smokey Creek Trail east from Mule Ear Overlook. Big Bend National Park, Texas, November 25, 2007
 Smokey Creek Trail near Trap Spring east from Mule Ear Overlook, view to the west. Big Bend National Park, Texas, November 25, 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
 Trap Mountain(?) west from Smokey Creek Trail near Trap Spring east from Mule Ear Overlook. Big Bend National Park, Texas, November 25, 2007
 Smokey Creek Trail east from Mule Ear Spring. 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
 Valley of Smokey Creek, view to the east from a trail north from Mule Ear Peaks. 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
 Mule Ear Peaks from Smokey Creek Trail. Big Bend National Park, Texas, November 25, 2007
 Smokey Creek Trail north from Mule Ear Peaks. Big Bend National Park, Texas, November 25, 2007
 Ocotillo on Smokey Creek Trail north from Mule Ear Peaks. 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
 Goat Mountain, view to the north from Smokey Creek Trail near Mule Ear Spring. Big Bend National Park, Texas, November 25, 2007
 Cacti on east part of Dodson Trail. Big Bend National Park, Texas, November 23, 2007
 Agave on Smokey Creek Trail. Big Bend National Park, Texas, November 24, 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
 Canyon of Smokey Creek. Big Bend National Park, Texas, November 25, 2007
 Pour-off of Smokey Creek. Big Bend National Park, Texas, November 25, 2007
 Cactus on rocks of Smokey Creek. 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
 Maiden ferns at Mule Ear Spring. Big Bend National Park, Texas, November 25, 2007
 Cacti and agaves on South Rim. Big Bend National Park, November 28, 2009
 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
 Agave, cacti and El Capitan Mountain from a trail in Guadalupe Mountains National Park. Texas, December 27, 2007
 Cacti east from Turkey Pass Trail in Enchanted Rock State Natural Area. Fredericksburg, Texas, October 27, 2007
 Lower part of Juniper Canyon 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
 Lower (flat) part of Juniper Canyon Trail. Big Bend National Park, Texas, November 23, 2007
 Boot Rock, view from Juniper Canyon Trail. Big Bend National Park, Texas, November 23, 2007
 Fresno Circle campsite near Dodson Trail at evening. Big Bend National Park, Texas, November 23, 2007
 South Rim, view from Fresno Circle campsite near Dodson 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
 Elephant Tusk Rock, view from Fresno Spring near Dodson Trail. Big Bend National Park, Texas, November 24, 2007
 Crown Mountain, view from lower part of Juniper Canyon Trail. Big Bend National Park, Texas, November 23, 2007
 Fresno Spring at evening. Big Bend National Park, Texas, November 23, 2007
 Ruins of Dodson Ranch. 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
 Chisos Mountains with snow, view from Castalon Highway. Big Bend National Park, Texas, November 25, 2007
 Echinocereus cacti growing on ruins of Hunter Line shack in McKittrick Canyon. Guadalupe Mountains National Park, Texas, December 28, 2007
 Overlook of a bend of Pilant Slough in Brazos Bend State Park. Needville, Texas, December 14, 2008
 Slopes of Chisos Mountains east from Boot Spring Trail. Big Bend National Park, November 27, 2009
 Century plant and Elephant Tusk Mountain, view from South Rim. Big Bend National Park, Texas, November 22, 2007
 Cacti in Old Cemetery. Beer-Sheva, the Middle East, November 4, 2000
 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
 Chisos Mountains with traces of snow, view from Castalon Highway (Ross Maxwell Scenic Drive). Big Bend National Park, Texas, November 25, 2007
 Icy bushes near Iron Bridge Trail in Lick Creek Park after ice storm. College Station, Texas, January 17, 2007
 East summit of Emory Peak in fog. Big Bend National Park, November 27, 2009
 Ponds of Can Creek from an overlook of East Trail in Lost Maples State Natural Area. Vanderpool, Texas, November 8, 2008
 Switchbacks of Blue Creek Trail. Big Bend National Park, November 29, 2009
 Area of red rocks on Blue Creek Trail. Big Bend National Park, November 29, 2009
 Fruit of cholla cactus (cylindropuntia) on Blue Creek Trail. Big Bend National Park, November 29, 2009
 Fruits of Texas madrone (Arbutus xalapensis) on Blue Creek Trail. Big Bend National Park, November 29, 2009
 One of eroded pinnacles of pink volcanic tuff on Blue Creek Trail. Big Bend National Park, November 29, 2009
 An alligator hiding in bushes near Marsh Overlook Trail in Barataria Preserve, south from New Orleans. Louisiana, August 26, 2006
 Agaves and cacti in snow near a road between White s City and Carlsbad Caverns. New Mexico, December 26, 2007
 East summit of Emory Peak, with north summit visible in fog. Big Bend National Park, November 27, 2009
 Cacti on a slope of Freshman Mountain in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 24, 2007
 Eroded pinnacles of pink volcanic tuff looking like a miniature Bryce Canyon on Blue Creek Trail. Big Bend National Park, November 29, 2009
 Boot Spring Trail. Big Bend National Park, November 26, 2009
 Emory Peak Trail in fog. Big Bend National Park, November 27, 2009
 - North East Rim 11/29/97 evening (A trip to Big Bend Park, November 29 - 30, 1997)
 - North East Rim 11/29/97 evening (A trip to Big Bend Park, November 29 - 30, 1997)
 - North East Rim 11/29/97 evening (A trip to Big Bend Park, November 29 - 30, 1997)
 - North East Rim 11/29/97 evening (A trip to Big Bend Park, November 29 - 30, 1997)
 - North East Rim 11/29/97 evening (A trip to Big Bend Park, November 29 - 30, 1997)
 - North East Rim 11/29/97 evening (A trip to Big Bend Park, November 29 - 30, 1997)
 - North East Rim 11/29/97 evening (A trip to Big Bend Park, November 29 - 30, 1997)
 Slopes of Chisos Mountains from Pinnacles Trail. Big Bend National Park, November 26, 2009
 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
 Upper part of Boot Canyon Trail. Big Bend National Park, November 27, 2009
 Emory Peak from lower section of Southwest Rim Trail. Big Bend National Park, November 28, 2009
 Fall colors of Chisos Mountains from Pinnacles Trail. Big Bend National Park, November 26, 2009
 Slopes of Chisos Mountains from Boot Spring Trail. Big Bend National Park, November 26, 2009
 Cliffs of Toll Mountain from Boot Spring Trail. Big Bend National Park, November 26, 2009
 Century plant which bloomed, died, and tipped over, on Pinnacles Trail. Big Bend National Park, November 26, 2009
 Group of people with Dallas Sierra Club on Pinnacles Trail. Big Bend National Park, November 26, 2009
 Cacti in Kibbutz Ein Gedi. The Middle East, April 26, 2000
 Cacti in Kibbutz Ein Gedi. The Middle East, April 26, 2000
 - dayhike along North East Rim to Boot Springs (A trip to Big Bend Park, November 28, 1997, day and evening)
 - dayhike along North East Rim to Boot Springs (A trip to Big Bend Park, November 28, 1997, day and evening)
 - dayhike along North East Rim to Boot Springs (A trip to Big Bend Park, November 28, 1997, day and evening)
 - dayhike along North East Rim to Boot Springs (A trip to Big Bend Park, November 28, 1997, day and evening)
 - dayhike along North East Rim to Boot Springs (A trip to Big Bend Park, November 28, 1997, day and evening)
 - dayhike along North East Rim to Boot Springs (A trip to Big Bend Park, November 28, 1997, day and evening)
 - dayhike along North East Rim to Boot Springs (A trip to Big Bend Park, November 28, 1997, day and evening)
 - dayhike along North East Rim to Boot Springs (A trip to Big Bend Park, November 28, 1997, day and evening)
 - dayhike along North East Rim to Boot Springs (A trip to Big Bend Park, November 28, 1997, day and evening)
 - dayhike along North East Rim to Boot Springs (A trip to Big Bend Park, November 28, 1997, day and evening)
 - dayhike along North East Rim to Boot Springs (A trip to Big Bend Park, November 28, 1997, day and evening)
 - dayhike along North East Rim to Boot Springs (A trip to Big Bend Park, November 28, 1997, day and evening)
 Cacti in Bahai garden in Haifa. The Middle East, April 22, 2000
 Side view of mushrooms Tricholoma saponaceum(?) under small oaks and bushes, south from Northern Trailhead for the Turkey Creek Trail of Big Thicket National Preserve. Warren, Texas, November 27, 2021
 Sandy washes of Blue Creek Canyon near Homer Wilson Ranch. Big Bend National Park, November 29, 2009
 Boot Rock from Boot Spring Trail. Big Bend National Park, November 28, 2009
 Boot Rock from Boot Spring Trail at sunrise. Big Bend National Park, November 28, 2009
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