 Prickly pears cactus in snow near a road between White s City and Carlsbad Caverns. New Mexico, December 26, 2007
 Plants in snow near a road between White s City and Carlsbad Caverns. New Mexico, December 26, 2007
 Fresh snow near a road between White s City and Carlsbad Caverns. New Mexico, December 26, 2007
 Agaves and cacti in snow near a road between White s City and Carlsbad Caverns. New Mexico, December 26, 2007
 Ocotillo bush near a road between White s City and Carlsbad Caverns. New Mexico, December 26, 2007
 Passage in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 "Natural entrance" to Carlsbad Caverns. New Mexico, December 26, 2007
 Limestone formations in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Flowstone feature in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Massive stalagmites in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Narrow passage in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Pointed formations in caves of Carlsbad Caverns. New Mexico, December 26, 2007
 Limestone tunnel in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 A column and other speleothems in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Travertine speleothems along a passage in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Stalactites and massive stalagmites in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Serpentine path of "Natural entrance" to Carlsbad Caverns. New Mexico, December 26, 2007
 Lions Tails hanging in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Columns in a small side alcove in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Massive stalagmites in Hall of Giants of Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 A narrow stalagmite with a large cluster of stalactites in the Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Stalactites and stalagmites in a small alcove along the side of Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Irregularly rounded- or scallop-shaped passages in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Huge stalagmite named "Rock of Ages" in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Irregularly shaped limestone formations along a passage of Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Bone-shaped limestone formations along a passage of Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Speleothems (including stalactites, stalagmites, a column, and helictites) in an alcove of the Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Drapery and ripple-shaped patterns of travertine flowstone speleothems in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 El Capitan Mountain with cholla cactus in foreground, view from upper Roadside Park. Guadalupe Mountains National Park, Texas, December 28, 2007
 Cane Cholla cactus and Southeast Rim, view from east part of Dodson Trail. Big Bend National Park, Texas, November 23, 2007
 Blooming Christmas cholla cactus (Tasajillo, Opuntia leptocaulis) in a ranch at 7278 Batts Ferry Road. College Station, Texas, August 1, 2014
 Flower of Christmas cholla cactus (Tasajillo, Opuntia leptocaulis) in a ranch at 7278 Batts Ferry Road. College Station, Texas, August 1, 2014
 Flowers of Christmas cholla cactus (Tasajillo, Opuntia leptocaulis) in a ranch at 7278 Batts Ferry Road. College Station, Texas, August 1, 2014
 Fruits of Christmas cholla cactus (Tasajillo, Opuntia leptocaulis) in a ranch at 7278 Batts Ferry Road. College Station, Texas, August 1, 2014
 Flower and fruits of Christmas cholla cactus (Tasajillo, Opuntia leptocaulis) in a ranch at 7278 Batts Ferry Road. College Station, Texas, August 1, 2014
 Cholla cactus (cylindropuntia) in Antique Rose Emporium. Independence, Texas, August 15, 2009
 Fruit of cholla cactus (cylindropuntia) on Blue Creek Trail. Big Bend National Park, November 29, 2009
 Paper-spined cholla cactus (Opuntia articulata) in Mercer Arboretum and Botanical Gardens. Humble (Houston area), Texas, July 18, 2014
 Christmas cholla cactus (Tasajillo, Opuntia leptocaulis) on Homestead Trail in McKinney Falls State Park. Austin, Texas, October 26, 2008
 Paper-spined cholla cactus (Opuntia articulata) in Mercer Arboretum and Botanical Gardens. Humble (Houston area), Texas, July 20, 2013
 Blooming cholla cactus(cylindropuntia) in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, April 26, 2012
 George Ashby s Phillips 66 gas station at crossing of Hwy 285 and FM 652. Orla, New Mexico, December 25, 2007
 Jefferson(?) Road in snow. Princeton, New Jersey, March 7, 2007
 A house at 91 Battle Road in snow. Princeton, New Jersey, March 7, 2007
 A house at 99 Jefferson Road in snow. Princeton, New Jersey, March 7, 2007
 A house at Jefferson Road in snow. Princeton, New Jersey, March 7, 2007
 Jackie and Hall Olds (Hal Old) store, grocery and cafe at crossing of Hwy 285 and FM 652. Orla, New Mexico, December 25, 2007
 Pad of pricly pears (opuntia) cactus with snow in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, December 10, 2008
 Hedgehog cactus near El Capitan Trail. Guadalupe Mountains National Park, Texas, December 27, 2007
 Cactus on rocks of El Capitan Trail. Guadalupe Mountains National Park, Texas, December 27, 2007
 Cushion cactus and El Capitan Mountain from a trail in Guadalupe Mountains National Park. Texas, December 27, 2007
 Claret cup cactus near Yapashi in Bandelier National Monument. New Mexico, near Los Alamos, May 25, 2008
 A sign near Orla grocery near historical marker No. 3876 at crossing of Hwy 285 and FM 652. Orla, New Mexico, December 25, 2007
 Orla cafe served to feed workers in oil, gas, and sulphur fields, at crossing of Hwy 285 and FM 652. Orla, New Mexico, December 25, 2007
 Stalagmites in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
 Claret cup cactus flower north from Capulin Canyon in Bandelier National Monument. New Mexico, near Los Alamos, May 26, 2008
 Stalactites in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
 The Watchtower in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
 A cave in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
 A hall in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
 Stalagmites in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
 Claret cup cactus (Echinocereus triglochidiatus) north from Capulin Canyon in Bandelier National Monument. New Mexico, near Los Alamos, May 24, 2008
 Blooming prickly pear cactus north from Capulin Canyon in Bandelier National Monument. New Mexico, near Los Alamos, May 24, 2008
 The King s Throne in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
 Pluto s Anteroom(?) in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
 Spacious hall in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
 Purple spineless prickly pears cactus in Davis Mountains State Park. Fort Davis, Texas, December 29, 2007
 Hedgehog cactus (Echinocereus viridiflorus) on northern hill in Davis Mountains State Park. Fort Davis, Texas, December 29, 2007
 Hall of the Mountain King(?) in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
 Magenta tinged prickly pears cactus on northern hill in Davis Mountains State Park. Fort Davis, Texas, December 29, 2007
 El Capitan Mountain with prickly pears cactus in foreground, view from upper Roadside Park. Guadalupe Mountains National Park, Texas, December 28, 2007
 The Pool and West Road in Central Park. New York City, March 18, 2007
 Nipple cactus (Missouri foxtail cactus, Escobaria missouriensis, Coryphantha missouriensis) on Moore s Hill Outcrop at FM Road 3090 near Navasota. Texas, April 17, 2022
 Christmas cactus (Tasajillo, Cylindropuntia leptocaulis) on a fence at Road 322 south from Milano. Texas, December 1, 2012
 Tasajillo (Cylindropuntia) cactus taken from a fence at Road 322 south from Milano. College Station, Texas, December 2, 2012
 Nipple cactus (Missouri foxtail cactus, Escobaria missouriensis, Coryphantha missouriensis) with fruits on Moore s Hill Outcrop at FM Road 3090 near Navasota. Texas, August 1, 2013
 Nipple cactus (Missouri foxtail cactus, Escobaria missouriensis, Coryphantha missouriensis) with red fruits on Moore s Hill Outcrop at FM Road 3090 near Navasota. Texas, October 20, 2013
 Fruits of Nipple cactus (Missouri foxtail cactus, Escobaria missouriensis, Coryphantha missouriensis) on Moore s Hill Outcrop at FM Road 3090 near Navasota. Texas, October 1, 2013
 Nipple cactus (Missouri foxtail cactus, Escobaria missouriensis, Coryphantha missouriensis) with red fruits on Moore s Hill Outcrop at FM Road 3090 near Navasota. Texas, April 17, 2022
 Offshoot of nipple cactus (Missouri foxtail cactus, Escobaria missouriensis, Coryphantha missouriensis) on Moore s Hill Outcrop at FM Road 3090 near Navasota. Texas, August 1, 2013
 Nipple cactus (Missouri foxtail cactus, Escobaria missouriensis, Coryphantha missouriensis) with fruits on Moore s Hill Outcrop at FM Road 3090 near Navasota. Texas, October 1, 2013
 Nipple cactus (Missouri foxtail cactus, Escobaria missouriensis, Coryphantha missouriensis) with flower buds on Moore s Hill Outcrop at FM Road 3090 near Navasota. Texas, April 21, 2018
 Circular clumps of nipple cactus (Missouri foxtail cactus, Escobaria missouriensis, Coryphantha missouriensis) on Moore s Hill Outcrop at FM Road 3090 near Navasota. Texas, August 1, 2013
 Circular clumps of nipple cactus (Missouri foxtail cactus, Escobaria missouriensis, Coryphantha missouriensis) on Moore s Hill Outcrop at FM Road 3090 near Navasota. Texas, July 21, 2013
 Close up of Nipple cactus (Missouri foxtail cactus, Escobaria missouriensis, Coryphantha missouriensis) with fruits on Moore s Hill Outcrop at FM Road 3090 near Navasota. Texas, October 1, 2013
 Pedernales Falls. Johnson City, Texas, December 24, 2007
 Nipple cactus (Missouri foxtail cactus, Escobaria missouriensis, Coryphantha missouriensis) with red fruits and flower buds on Moore s Hill Outcrop at FM Road 3090 near Navasota. Texas, April 17, 2022
 Lake above Pedernales Falls. Johnson City, Texas, December 24, 2007
 Cliffs above Pedernales Falls. Johnson City, Texas, December 24, 2007
 Waterfalls above Pedernales Falls. Johnson City, Texas, December 24, 2007
 Pool of Pedernales Falls. Johnson City, Texas, December 24, 2007
 Cypress pool below Pedernales Falls. Johnson City, Texas, December 24, 2007
 Riverbed rocks above Pedernales Falls. Johnson City, Texas, December 24, 2007
 A white house at 37 Hodge Road. Princeton, New Jersey, March 7, 2007
 Oak alley in snow of New Main Road on campus of Texas A and M University. College Station, Texas, December 7, 2017
 Catamarans on a beach in Ventnor City. Atlantic City, New Jersey, March 24, 2007
 Yachts on a beach in Ventnor City. Atlantic City, New Jersey, March 24, 2007
 A beach boardwalk in Ventnor City. Atlantic City, New Jersey, March 24, 2007
 Cactus on rocks of Smokey Creek. Big Bend National Park, Texas, November 25, 2007
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