 Rocks and Can Creek from western section of East Trail in Lost Maples State Natural Area. Vanderpool, Texas, November 8, 2008
 Western section of East Trail in Lost Maples State Natural Area. Vanderpool, Texas, November 8, 2008
 Ponds of Can Creek from an overlook of East Trail in Lost Maples State Natural Area. Vanderpool, Texas, November 8, 2008
 Foliage on western section of East Trail in Lost Maples State Natural Area. Vanderpool, Texas, November 8, 2008
 Rocks and trees near western section of East Trail in Lost Maples State Natural Area. Vanderpool, Texas, November 8, 2008
 Maples near East Trail in Lost Maples State Natural Area. Vanderpool, Texas, November 8, 2008
 Rock shelters of Hale Hollow Creek near East Trail in Lost Maples State Natural Area. Vanderpool, Texas, November 8, 2008
 Back-lit trees on East Trail in Lost Maples State Natural Area. Vanderpool, Texas, November 8, 2008
 Stones and trees in Lost Maples State Natural Area, on East Trail. Vanderpool, Texas, November 7, 2008
 Pond with rocks in Lost Maples State Natural Area, on East Trail. Vanderpool, Texas, November 7, 2008
 Rock shelters of Hale Hollow Creek East Trail in Lost Maples State Natural Area, at evening. Vanderpool, Texas, November 8, 2008
 Red foliage of maple trees in Lost Maples State Natural Area, on East Trail. Vanderpool, Texas, November 7, 2008
 Reddish maple leaves in Lost Maples State Natural Area, on East Trail. Vanderpool, Texas, November 7, 2008
 East Trail crowded by park visitors in Lost Maples State Natural Area. Vanderpool, Texas, November 8, 2008
 Red foliage of bigtooth maple on East Trail in Lost Maples State Natural Area. Vanderpool, Texas, November 8, 2008
 Prickly pears cactus on East Trail in Lost Maples State Natural Area. Vanderpool, Texas, November 8, 2008
 East Trail on a grassy terrace in Lost Maples State Natural Area, close to parking. Vanderpool, Texas, November 8, 2008
 Fall foliage of bigtooth maple on East Trail in Lost Maples State Natural Area. Vanderpool, Texas, November 8, 2008
 Hillside view west from East Trail in Lost Maples State Natural Area, close to parking. Vanderpool, Texas, November 8, 2008
 Water stream of Can Creek from West Trail in Lost Maples State Natural Area. Vanderpool, Texas, November 8, 2008
 Ball moss (Tillandsia recurvata) on a maple tree in Lost Maples State Natural Area, on East Trail. Vanderpool, Texas, November 7, 2008
 Rocks, a pond and a foot bridge of Maple Trail, view from East Trail in Lost Maples State Natural Area. Vanderpool, Texas, November 8, 2008
 Ball moss (Tillandsia recurvata) in tangled balls around a tree branch in Lost Maples State Natural Area, on East Trail. Vanderpool, Texas, November 7, 2008
 Bigtooth maple in Lost Maples State Natural Area, near parking. Vanderpool, Texas, November 7, 2008
 Sabinal River in Lost Maples State Natural Area, near parking. Vanderpool, Texas, November 7, 2008
 Sabinal River from East Trail in Lost Maples State Natural Area. Vanderpool, Texas, December 30, 2007
 Waterfall of Can Creek from West Trail in Lost Maples State Natural Area. Vanderpool, Texas, December 30, 2007
 Painted lady butterfly (Vanessa virginiensis) on mullein flower in east area of Lost Pines State Park. Bastrop, Texas, November 14, 2009
 Rocks east from Turkey Pass Trail in Enchanted Rock State Natural Area. Fredericksburg, Texas, October 27, 2007
 Cacti east from Turkey Pass Trail in Enchanted Rock State Natural Area. Fredericksburg, Texas, October 27, 2007
 Southern Jack O Lantern mushrooms (Omphalotus subilludens) on Lost Pines Trail in Lost Pines State Park. Bastrop, Texas, November 14, 2009
 Painted lady butterfly (Vanessa virginiensis) with closed wings on mullein flower in east area of Lost Pines State Park. Bastrop, Texas, November 14, 2009
 Rocks on a slope of Freshman Mountain east from Turkey Pass Trail in Enchanted Rock State Natural Area. Fredericksburg, Texas, October 27, 2007
 Gray Hairstreak (Strymon melinus) butterfly on flower heads of fragrant cudweed (sweet everlasting, Pseudognaphalium obtusifolium) in east area of Lost Pines State Park. Bastrop, Texas, November 14, 2009
 Ponds of Pedernales Falls. Johnson City, Texas, November 29, 2008
 Walking on Lost Pines Trail in Bastrop State Park. Bastrop, Texas, May 17, 2008
 Red trail near Piney Hill Campgrounds in Lost Pines State Park. Bastrop, Texas, November 14, 2009
 A trail near Piney Hill Campgrounds in Lost Pines State Park. Bastrop, Texas, November 14, 2009
 A trail near Piney Hill Campgrounds in Lost Pines State Park. Bastrop, Texas, November 14, 2009
 A trail with smoke rising from Piney Hill Campgrounds in Lost Pines State Park. Bastrop, Texas, November 14, 2009
 Turkey Pass Trail in Enchanted Rock State Natural Area. Fredericksburg, Texas, October 27, 2007
 Weathering of rocks near Turkey Pass Trail in Enchanted Rock State Natural Area. Fredericksburg, Texas, October 27, 2007
 Lichens on rocks near Turkey Pass Trail in Enchanted Rock State Natural Area. Fredericksburg, Texas, October 27, 2007
 Lost Pines Trail in Bastrop State Park. Bastrop, Texas, November 4, 2007
 Area near Trail Head No. 3 on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, November 13, 2020
 Lost Pines Trail in mist in Bastrop State Park. Bastrop, Texas, November 4, 2007
 Prickly pear cactus on Turkey Pass Trail in Enchanted Rock State Natural Area. Fredericksburg, Texas, October 27, 2007
 CCC pavilion at an overlook in Lost Pines State Park. Bastrop, Texas, September 6, 2008
 Many Warts mushroom (Amanita polypyramis) on Lost Pines Trail in Bastrop State Park. Bastrop, Texas, November 4, 2007
 Barren area of Lost Pines Trail in Bastrop State Park. Bastrop, Texas, October 5, 2013
 Area of Lost Pines hiking trail in Bastrop State Park. Bastrop, Texas, April 21, 2012
 Pedestal rock (differential weathering) near Turkey Pass Trail in Enchanted Rock State Natural Area. Fredericksburg, Texas, October 27, 2007
 Members of the Qatar Natural History Group (QNHG) exploring area of gypsum crystal pavement (selenite) during fossil trip in area of Jebel Al-Nakhsh in south-western Qatar, February 7, 2014
 Between Kings and Middle ponds in Massasoit State Park. East Taunton, Massachusetts, May 3, 2003.
 Area of Echo Canyon in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
 Green moss in area of water seepage in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
 Rocky creek near Lost Pines Trail in Bastrop State Park. Bastrop, Texas, May 12, 2012
 A creek near Lost Pines Trail in Bastrop State Park. Bastrop, Texas, June 16, 2012
 Small creek near Lost Pines Trail in Bastrop State Park. Bastrop, Texas, June 16, 2012
 Birdwatching with QNHG (Qatar Natural History Group) near Abu Nakhla wastewater treatment ponds. Doha, Qatar, March 29, 2014
 Western ironweed (Vernonia baldwini) on Deer Run Trail in Lick Creek Park. College Station, Texas, September 30, 2008
 Western ironweed (Vernonia texana) in Lick Creek Park, on Deer Run Trail. College Station, Texas, June 21, 2008
 Watching birds with QNHG (Qatar Natural History Group) near Abu Nakhla wastewater treatment ponds. Doha, Qatar, March 29, 2014
 Beach Area in Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
 Close up of leather lichen Dermatocarpon luridum in water seepage area on granite in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
 Western ironweed (Vernonia baldwini) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 20, 2008
 Western ironweed (Vernonia baldwini) in Sam Houston National Forest, on Little Lake Creek Loop Trail. Richards, Texas, August 10, 2008
 Dry squamulous lichen Cladonia growing on moss Grimmia with hyaline hairpoints in shady area in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
 Cypresses in Beach Area in Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
 Area of Trummel Crossing in Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
 Roots in north area of Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
 Cypresses in north area of Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
 Western ironweed (Vernonia baldwini) flower on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 20, 2008
 Roman Cave (?) (blue trail) in western Timna Park, 13 miles north from Eilat. The Middle East, November 7, 2002
 Roman Cave (?) (blue trail) in western Timna Park, 13 miles north from Eilat. The Middle East, November 7, 2002
 Roman Cave (?) (blue trail) in western Timna Park, 13 miles north from Eilat. The Middle East, November 7, 2002
 A small wadi from a trail below western cliffs in Timna Park, 13 miles north from Eilat. The Middle East, November 7, 2002
 Pink Canyon (?) from Blue Trail in western Timna Park, 13 miles north from Eilat. The Middle East, November 7, 2002
 Cross section of oak bracket mushroom (Pseudoinonotus dryadeus) at the base of an oak tree on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, November 1, 2020
 Cypress forest in north area of Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
 Red cypress foliage in north area of Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
 River flats in north area of Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
 Cypresses "bonsai" in north area of Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
 Dry trees in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
 Western Horse Nettle (Potato-weed, Solanum dimidiatum) near Deer Run Trail in Lick Creek Park. College Station, Texas, June 8, 2008
 Potato-weed (western horse nettle, Solanum dimidiatum) in Lick Creek Park, on Deer Run Trail. College Station, Texas, June 21, 2008
 Pine forest near Piney Hill Campgrounds in Lost Pines State Park. Bastrop, Texas, November 14, 2009
 Cypresses on a river island in north area of Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
 Trees trimmed by floodings in north area of Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
 Rusty cypress foliage in north area of Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
 Dying cypress trees in north area of Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
 Roots of cypress trees in north area of Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
 Trunks of dead trees in north area of Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
 Trees damaged by floodings in north area of Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
 Bald cypress trees in Beach Area in Pedernales Falls State Park. Johnson City, Texas, November 29, 2008
 Turkey Peak in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 24, 2007
 Seedling of Salsola vermiculata (local name hamd) taken from area of ponds near the entrance of Irkhaya (Irkaya) Farms. Qatar, November 13, 2015
 Ramon Crater east from Mitzpe Ramon, a tree near the western head of Horseshoe Trail along Nekarot Creek. The Middle East, December 19, 2001
 Cypress trees combed by floodwaters in Beach Area in Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
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