 Back lit flower of butterfly pea (Centrosema virginianum) on Richards Loop Trail in Sam Houston National Forest. Texas, July 29, 2021
 Flower of Butterfly pea (Centrosema virginianum) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 13, 2014
 Butterfly pea (Centrosema virginianum) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 7, 2013
 Back lit butterfly pea (Centrosema virginianum) on Richards Loop Trail in Sam Houston National Forest. Texas, July 12, 2020
 Flower of Butterfly pea (Centrosema virginianum) in Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, May 26, 2012
 Flower of butterfly pea (Centrosema virginianum) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 22, 2008
 Flower of butterfly pea (Centrosema virginianum) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 29, 2019
 Close up of a flower of Butterfly pea (Centrosema virginianum) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 15, 2019
 Close-up of a flower of butterfly pea (Centrosema virginianum) on Richards Loop Trail in Sam Houston National Forest. Texas, July 29, 2021
 Butterfly pea (Centrosema virginianum) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 20, 2008
 Butterfly pea (Centrosema virginianum) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 13, 2014
 Butterfly pea (Centrosema virginianum) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 13, 2014
 Flower of butterfly pea (Centrosema virginianum) on Richards Loop Trail in Sam Houston National Forest. Texas, August 7, 2021
 Butterfly pea (Centrosema virginianum) in Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, May 26, 2012
 Flower of butterfly pea (Centrosema virginianum) on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, July 20, 2019
 Close-up of a flower of butterfly pea (Centrosema virginianum) on Richards Loop Trail in Sam Houston National Forest. Texas, August 7, 2021
 Butterfly pea (Centrosema virginianum) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 29, 2019
 Butterfly pea (Centrosema virginianum) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 15, 2019
 Butterfly pea (Centrosema virginianum) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 15, 2019
 Butterfly pea (Centrosema virginianum) on Richards Loop Trail in Sam Houston National Forest. Texas, July 28, 2020
 Butterfly pea (Centrosema virginianum) on Richards Loop Trail in Sam Houston National Forest. Texas, July 12, 2020
 Butterfly pea (Centrosema virginianum) on Richards Loop Trail in Sam Houston National Forest. Texas, July 29, 2021
 Blooming butterfly pea (Centrosema virginianum) on Richards Loop Trail in Sam Houston National Forest. Texas, July 29, 2021
 Blooming butterfly pea (Centrosema virginianum) on Richards Loop Trail in Sam Houston National Forest. Texas, July 12, 2020
 Blooming butterfly pea (Centrosema virginianum) on Richards Loop Trail in Sam Houston National Forest. Texas, July 29, 2021
 Close-up of butterfly pea (Centrosema virginianum) on Richards Loop Trail in Sam Houston National Forest. Texas, July 12, 2020
 Flowers and green fruits of butterfly pea (Centrosema virginianum) on Richards Loop Trail in Sam Houston National Forest. Texas, July 29, 2021
 Flower of butterfly pea (Centrosema virginianum) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest. Texas, August 24, 2024
 Flower of butterfly pea (Centrosema virginianum) on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, August 11, 2019
 Butterfly pea (Centrosema virginianum) on Richards Loop Trail in Sam Houston National Forest. Texas, August 21, 2020
 Butterfly pea (Centrosema virginianum) on Richards Loop Trail in Sam Houston National Forest. Texas, August 7, 2021
 Butterfly pea (Centrosema virginianum) on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, July 20, 2019
 Blooming butterfly pea (Centrosema virginianum) on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, July 20, 2019
 Butterfly pea (Centrosema virginianum) and bracken fern on Richards Loop Trail in Sam Houston National Forest. Texas, August 7, 2021
 Flower of butterfly pea (Centrosema virginianum) on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, June 22, 2021
 Large flower of butterfly pea (Centrosema virginianum) on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, June 22, 2021
 Flower of butterfly pea (Centrosema virginianum) among bracken fern on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, June 22, 2021
 Shoot of butterfly pea (Centrosema virginianum)(?) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest near Huntsville. Texas, March 30, 2019
 Butterfly pea (Centrosema virginianum) on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, August 11, 2019
 Butterfly pea (Centrosema virginianum) on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, June 22, 2021
 Blooming butterfly pea (Centrosema virginianum) on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, June 22, 2021
 Back lit yellow and green passion flower (Passiflora lutea) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 7, 2013
 Flower of butterfly pea (Centrosema virginianum) in Lick Creek Park. College Station, Texas, July 21, 2019
 Back lit Butterfly pea (Centrosema virginianum) in Lick Creek Park. College Station, Texas, June 14, 2012
 Butterfly pea (Centrosema virginianum) on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest near Huntsville, Texas, August 4, 2018
 Shoot of butterfly pea (Centrosema virginianum) near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, March 11, 2023
 Seedling of butterfly pea (Centrosema virginianum) near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, March 11, 2023
 Butterfly pea (Centrosema virginianum) flower in Lick Creek park, on Deer Run Trail. College Station, June 15, 2008
 Back lit flowers of arrowhead (Sagittaria) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 7, 2013
 Flower of Butterfly pea (Centrosema virginianum) in Lick Creek Park. College Station, Texas, June 14, 2012
 Leaves and a flower of Butterfly pea (Centrosema virginianum) in Lick Creek Park. College Station, Texas, June 14, 2012
 Close up of a flower of Butterfly pea (Centrosema virginianum) in Lick Creek Park. College Station, Texas, June 14, 2012
 Butterfly pea (Centrosema virginianum) in Lick Creek Park. College Station, Texas, July 21, 2019
 Butterfly pea (Centrosema virginianum) in Lick Creek Park. College Station, Texas, July 1, 2014
 Butterfly pea (Centrosema virginianum) in Lick Creek Park. College Station, Texas, July 10, 2014
 Back lit Butterfly pea (Centrosema virginianum) west from Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, June 16, 2012
 Winecup flower (Callirhoe) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 7, 2013
 Pink powderpuff flower (Mimosa strigillosa) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 7, 2013
 Back-lit purple flower of wood sorrel in Sam Houston National Forest on Little Lake Creek Loop Trail. Richards, Texas, April 4, 2010.
 Yellow and green passion flower (Passiflora lutea) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 7, 2013
 Back lit flower of Pigeon wings (Clitoria mariana) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 15, 2019
 Yellow and green passion flower (Passiflora lutea) with ferns on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 7, 2013
 Climbing yellow and green passion flower (Passiflora lutea) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 7, 2013
 Close up of yellow and green passion flower (Passiflora lutea) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 7, 2013
 Back lit St. Andrew cross flower (Hypericum, Ascyrum hypericoides) in Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, September 26, 2009
 Butterfly pea (Centrosema virginianum) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, August 17, 2021
 Butterfly pea (Centrosema virginianum) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, June 14, 2020
 Butterfly pea (Centrosema virginianum) on Park Hudson Trail. College Station, Texas, August 6, 2014
 Close up of Butterfly pea (Centrosema virginianum) on Park Hudson Trail. College Station, Texas, August 6, 2014
 Butterfly pea (Centrosema virginianum) in Lick Creek Park. College Station, Texas, June 14, 2012
 Butterfly pea (Centrosema virginianum) in Lick Creek Park. College Station, Texas, June 30, 2012
 Butterfly pea (Centrosema virginianum) in Lick Creek Park. College Station, Texas, June 9, 2019
 Small yellow flower of pea family (Pencil flower, Stylosanthes biflora) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 20, 2008
 Ruellia flower on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 13, 2014
 Commelina flower on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 13, 2014
 Blue flower of Commelina on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 13, 2014
 Flower of Ruellia nudiflora on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 13, 2014
 Blue flower of Commelina on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 13, 2014
 Skullcap (Scutellaria) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 7, 2013
 Arrowhead (Sagittaria) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 7, 2013
 Western ironweed (Vernonia baldwini) flower on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 20, 2008
 Green passion flower (Passiflora lutea) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 20, 2008
 Yellow and green passion flower (Passiflora lutea) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 20, 2008
 Opening flower of blue waterleaf (Hydrolea ovata) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 20, 2008
 St. Andrew cross (Ascyrum hypericoides, Hypericum) flower on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 20, 2008
 Flower of Maryland meadow-beauty (Rhexia mariana) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 13, 2014
 Western ironweed (Vernonia baldwini) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 7, 2013
 Branched Noseburn (Tragia ramosa) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 7, 2013
 Morning Glory (Ipomoea cordatotriloba) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 7, 2013
 Handeless coneflower (Echinacea sanguinea) with hairstreak butterfly in Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, May 26, 2012
 Back lit cardinal flower (Lobelia cardinalis) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, September 14, 2019
 Horse nettle (potato-weed, Solanum) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 7, 2013
 Yellow and green passion flower (Passiflora lutea), with corona and pistil, on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 20, 2008
 Climbing angularfruit milkvine (anglepod, Matelea gonocarpos) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 7, 2013
 Rosette of leaves of elephant foot (Elephantopus carolinianus) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 7, 2013
 Back lit flowers of elephant foot (Elephantopus carolinianus) in Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, September 26, 2009
 Back lit Violet Wood Sorrel (Oxalis violacea) in Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, October 22, 2011
 Green flowers of angularfruit milkvine (anglepod, Matelea gonocarpos) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 7, 2013
 Flower of Purple pleat-leaf (Pinewood lily, Alophia drummondii, Eustylis purpurea) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 13, 2014
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