 Alligator weed (Alternanthera philoxerpides) near a pond in Central Park. College Station, Texas, June 15, 2012
 Alligator weed (Alternanthera philoxeroides) near a pond in Central Park. College Station, Texas, July 30, 2014
 Alligator weed (Alternanthera philoxeroides) near a pond in Central Park. College Station, Texas, July 8, 2014
 Flowers of Alligator weed (Alternanthera philoxeroides) near a pond in Central Park. College Station, Texas, July 30, 2014
 Whitish, papery ball-shaped flower of Alligator weed (Alternanthera philoxeroides) in Brazos County Park. Bryan, Texas, May 23, 2012
 Alligator weed (Alternanthera philoxeroides) in Brazos County Park. Bryan, Texas, May 23, 2012
 Prostrate weed of khakiweed (washerwoman, mat chaff flower, Alternanthera caracasana) with prickly seeds taken from a lawn. College Station, Texas, November 23, 2010
 Close up of a flower of Potato-weed (solanum) in Lick Creek Park. College Station, Texas, July 7, 2012
 Yellow flower of floating primrose-willow (Ludwigia peploides) near a pond in Central Park. College Station, Texas, July 8, 2014
 Black eyed susan and mock bishop s weed in Lick Creek Park. College Station, Texas, June 6, 2012
 Central part of basket flower (Centaurea americana) in TAMU Holistic Garden in Texas A and M University. College Station, Texas, May 20, 2012
 Cypress in a pond of Central Park. College Station, Texas, November 13, 2011
 Geese in a pond of Central Park. College Station, Texas, November 20, 2010
 Bald cypress in a pond of Central Park. College Station, Texas, November 13, 2011
 Cypress tree in a pond of Central Park. College Station, Texas, December 5, 2009
 Cypress trees and a pond in Central Park. College Station, Texas, November 20, 2010
 Bald cypress in a pond in Central Park. College Station, Texas, December 12, 2013
 Smartweed (Polygonum) near a pond in Central Park. College Station, Texas, July 30, 2014
 Christmas lights reflected in a pond of Central Park. College Station, Texas, December 17, 2008
 Bald cypress trees in Central Park pond. College Station, Texas, December 5, 2009
 Coreopsis flower in Lick Creek Park. College Station, Texas, June 6, 2012
 Bald cypress trees in a fishing pond of Central Park. College Station, Texas, December 5, 2009
 Steamboat Christmas light decoration on a pond in Central Park. College Station, Texas, December 29, 2009
 Potato-weed (solanum) in Lick Creek Park. College Station, Texas, July 7, 2012
 Close up of tradescantia flower in Lick Creek Park. College Station, Texas, June 6, 2012
 Floating primrose-willow (Ludwigia peploides) near a pond in Central Park. College Station, Texas, July 8, 2014
 Mock Bishop s Weed on cutting near the park fence in Lick Creek Park. College Station, Texas, May 7, 2012
 White flower of Potato-weed (solanum) in Lick Creek Park. College Station, Texas, July 24, 2013
 Khaki Burr weed (Alternanthera pungens) on Green Circles (center-pivot irrigation) in Irkhaya (Irkaya) Farms. Qatar, October 9, 2015
 Thistle (Cirsium engelmannii) flower in Lick Creek Park. College Station, Texas, June 30, 2012
 Passion flower (Passiflora foetida) in Lick Creek Park. College Station, Texas, June 20, 2012
 Thistle (Cirsium engelmannii) flower bud in Lick Creek Park. College Station, Texas, June 10, 2012
 Flower of thistle (Cirsium engelmannii) in Lick Creek Park. College Station, Texas, June 26, 2012
 Flower of Butterfly pea (Centrosema virginianum) in Lick Creek Park. College Station, Texas, June 14, 2012
 Dry black eyed susan flower in Lick Creek Park. College Station, Texas, June 14, 2012
 Passion flower (Passiflora foetida) in dew in Lick Creek Park. College Station, Texas, June 22, 2012
 Flower of thistle (Cirsium engelmannii) in Lick Creek Park. College Station, Texas, June 22, 2012
 Black-eyed susan and Mock Bishop s Weed in Lick Creek Park. College Station, Texas, May 7, 2012
 Flower buds of squaw-weed (Senecio ampullaceus) in Lick Creek Park. College Station, Texas, March 20, 2023
 Close up of Khaki Burr weed (Alternanthera pungens) on Green Circles (center-pivot irrigation) in Irkhaya (Irkaya) Farms. Qatar, October 9, 2015
 Carpet of Khaki Burr weed (Alternanthera pungens) on Green Circles (center-pivot irrigation) in Irkhaya (Irkaya) Farms. Qatar, October 9, 2015
 Spreading of Khaki Burr weed (Alternanthera pungens) on Green Circles (center-pivot irrigation) in Irkhaya (Irkaya) Farms. Qatar, August 21, 2015
 Spiny flower bud of a thistle (Cirsium engelmannii) in Lick Creek Park. College Station, Texas, June 20, 2012
 Close up of a thistle (Cirsium engelmannii) flower bud in Lick Creek Park. College Station, Texas, June 10, 2012
 Thistle (Cirsium engelmannii) flower buds in Lick Creek Park. College Station, Texas, June 10, 2012
 Leaves and a flower of Butterfly pea (Centrosema virginianum) in Lick Creek Park. College Station, Texas, June 14, 2012
 Dry head of black eyed susan flower in Lick Creek Park. College Station, Texas, June 20, 2012
 Blooming Passion flower (Passiflora foetida) in Lick Creek Park. College Station, Texas, June 22, 2012
 Globular flower bud of a thistle (Cirsium engelmannii) in Lick Creek Park. College Station, Texas, June 10, 2012
 Close up of passion flower (Passiflora foetida) in Lick Creek Park. College Station, Texas, June 22, 2012
 Close up of a flower of thistle (Cirsium engelmannii) in Lick Creek Park. College Station, Texas, June 22, 2012
 Close up of a flower of Butterfly pea (Centrosema virginianum) in Lick Creek Park. College Station, Texas, June 14, 2012
 Black-eyed susan and Mock Bishop s Weed flowers in Lick Creek Park. College Station, Texas, May 7, 2012
 Black-eyed susan, Mock Bishop s Weed, and plantain in Lick Creek Park. College Station, Texas, May 7, 2012
 Fruits of Horse Nettle (Potato-weed, Solanum) in Lick Creek Park. College Station, Texas, September 16, 2012
 Flower buds of squaw-weed (Senecio ampullaceus) in Anderson Arboretum in Bee Creek Park. College Station, March 7, 2024
 Parasol flower head of false bishop s weed (Ammi majus) in Lick Creek Park. College Station, Texas, May 17, 2018
 Khaki Burr weed (Alternanthera pungens) on Green Circles (center-pivot irrigation) in Irkhaya (Irkaya) Farms. South-western Qatar, October 25, 2014
 Dense infestation by Khaki Burr weed (Alternanthera pungens) on Green Circles (center-pivot irrigation) in Irkhaya (Irkaya) Farms. Qatar, October 9, 2015
 Mature head of black eyed susan flower in Lick Creek Park. College Station, Texas, June 20, 2012
 Spiny globular flower bud of a thistle (Cirsium engelmannii) in Lick Creek Park. College Station, Texas, June 10, 2012
 Fragment of Passion flower (maypop, Passiflora foetida) in Lick Creek Park. College Station, Texas, June 14, 2012
 Drying head of black eyed susan flower in Lick Creek Park. College Station, Texas, June 20, 2012
 Flower of shrubby water-primrose (Ludwigia octovalvis) in Lick Creek Park. College Station, Texas, June 30, 2012
 Side view of Passion flower (Passiflora foetida) in Lick Creek Park. College Station, Texas, June 20, 2012
 Dry flower spike of largebracted plantain (Plantago aristata) in Lick Creek Park. College Station, Texas, June 6, 2012
 Black-eyed susan, Mock Bishop s Weed, and Curly Dock in Lick Creek Park. College Station, Texas, May 7, 2012
 Black-eyed susan and Mock Bishop s Weed near Post Oak Trail in Lick Creek Park. College Station, Texas, May 18, 2012
 Fresh leaves of Khaki Burr weed (Alternanthera pungens) on a field on Green Circles (center-pivot irrigation) in Irkhaya (Irkaya) Farms. Qatar, April 10, 2015
 Close up of Khaki Burr weed (Alternanthera pungens) on Green Circles (center-pivot irrigation) in Irkhaya (Irkaya) Farms. South-western Qatar, October 25, 2014
 Close up of Khaki Burr weed (Alternanthera pungens) on Green Circles (center-pivot irrigation) in Irkhaya (Irkaya) Farms. South-western Qatar, November 15, 2014
 Mats of Khaki Burr weed (Alternanthera pungens) on Green Circles (center-pivot irrigation) in Irkhaya (Irkaya) Farms. South-western Qatar, October 25, 2014
 Carpet of Khaki Burr weed (Alternanthera pungens) on Green Circles (center-pivot irrigation) in Irkhaya (Irkaya) Farms. South-western Qatar, October 25, 2014
 Khaki Burr weed (Alternanthera pungens) carpeting the ground on Green Circles (center-pivot irrigation) in Irkhaya (Irkaya) Farms. South-western Qatar, October 25, 2014
 Khaki Burr weed (Alternanthera pungens) growing among spurge on Green Circles (center-pivot irrigation) in Irkhaya (Irkaya) Farms. South-western Qatar, October 25, 2014
 Black eyed susans (Rudbeckia hirta) and Mock bishop s weed (Ptilimnium nuttallii) in Lick Creek Park. College Station, Texas, May 7, 2012
 Black Eyed Susan (Rudbeckia hirta) and Mock Bishop s Weed (Ptilimnium nuttali) in Lick Creek Park. College Station, Texas, May 3, 2012
 Black-eyed susan (Rudbeckia hirta) and Mock Bishop s Weed (Ptilimnium nuttali) in Lick Creek Park. College Station, Texas, May 7, 2012
 Flower buds of Cutleaf groundsel (butterweed, squaw weed, Senecio) on Deer Run Trail in Lick Creek Park. College Station, Texas, April 29, 2009
 Khaki Burr weed (Alternanthera pungens) and spurge Euphorbia prostrata on Green Circles (center-pivot irrigation) in Irkhaya (Irkaya) Farms. South-western Qatar, October 25, 2014
 Khaki Burr weed (Alternanthera pungens) growing on sandy road on Green Circles (center-pivot irrigation) in Irkhaya (Irkaya) Farms. South-western Qatar, October 25, 2014
 Khaki Burr weed (Alternanthera pungens) growing among prostrate spurge on Green Circles (center-pivot irrigation) in Irkhaya (Irkaya) Farms. South-western Qatar, October 25, 2014
 Flower buds of common trumpet creeper (Foxglove vine, Campsis radicans) in Lick Creek Park. College Station, Texas, June 10, 2012
 Field of Black eyed susan and Mock bishop s weed (Ptilimnium nuttallii) near Post Oak Trail in Lick Creek Park. College Station, Texas, May 7, 2012
 Field of black-eyed susan (Rudbeckia hirta) and Mock Bishop s Weed (Ptilimnium nuttali) in Lick Creek Park. College Station, Texas, May 7, 2012
 Field of Black eyed susans (Rudbeckia hirta) and Mock bishop s weed (Ptilimnium nuttallii) in Lick Creek Park. College Station, Texas, May 10, 2012
 Black Eyed Susan (Rudbeckia hirta) and Mock Bishop s Weed (Ptilimnium nuttali) in Lick Creek Park. College Station, Texas, April 30, 2012
 Berries of Coma (gum bumelia, Gum Bully, Sideroxylon lanuginosum) in Central Park. College Station, Texas, August 23, 2012
 Black-eyed susan (Rudbeckia hirta) and Mock Bishop s Weed (Ptilimnium nuttali) at Post Oak Trail in Lick Creek Park. College Station, Texas, May 18, 2012
 Black eyed susans (Rudbeckia hirta) and Mock bishop s weed (Ptilimnium nuttallii) at Post Oak Trail in Lick Creek Park. College Station, Texas, May 10, 2012
 Black-eyed susan (Rudbeckia hirta) and Mock Bishop s Weed (Ptilimnium nuttali) near Post Oak Trail in Lick Creek Park. College Station, Texas, May 18, 2012
 Hairy carpet weed (Glinus lotoides) with flower buds in Flag Pond near Lake Somerville Trailway near Nails Creek Unit of Somerville Lake State Park. Texas, October 16, 2022
 Central part of a flower of white prickly poppy in Birch Creek Unit of Lake Somerville State Park, Texas, April 29, 2012
 Black-eyed susan (Rudbeckia hirta) and Mock Bishop s Weed (Ptilimnium nuttali) near Post Oak Trail at sunrise in Lick Creek Park. College Station, Texas, May 18, 2012
 Field of Black eyed susans (Rudbeckia hirta) and Mock bishop s weed (Ptilimnium nuttallii) near the equestrian entrance in Lick Creek Park. College Station, Texas, May 10, 2012
 Field of Black-eyed susan (Rudbeckia hirta) and Mock Bishop s Weed (Ptilimnium nuttali) near equestrian entrance in Lick Creek Park. College Station, Texas, May 18, 2012
 Alternanthera ficoidea or brasiliana(?) plant taken from a flower bed of a park in Onaiza area. Doha, Qatar, January 17, 2016
 Black oval berries of Coma (gum bumelia, Gum Bully, Sideroxylon lanuginosum) in Central Park. College Station, Texas, August 23, 2012
 Western horse nettle (Potato-weed, Solanum dimidiatum) in Lick Creek Park. College Station, June 15, 2008
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