 Violet ruella (Ruellia caroliniensis) flower on a trail in Sam Houston National Forest, near Road 149, near Richards. Texas, May 15, 2010
 Violet ruella (Ruellia caroliniensis) flower with water drops on a trail in Sam Houston National Forest, near Road 149, near Richards. Texas, May 15, 2010
 Blooming violet ruella (Ruellia caroliniensis) on Pilant Slough Trail in Brazos Bend State Park. Needville, Texas, April 11, 2009
 Violet ruella (Ruellia caroliniensis) in Lick Creek Park. College Station, Texas, May 2, 2022
 Violet ruella (Ruellia nudiflora) in Sam Houston National Forest, on Little Lake Creek Loop Trail. Richards, Texas, May 18, 2014
 Violet ruella (Ruellia nudiflora) in Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, May 26, 2012
 Flower of violet ruella (Ruellia nudiflora) in Sam Houston National Forest, on Little Lake Creek Loop Trail. Richards, Texas, May 18, 2014
 Violet ruella (Ruellia caroliniensis) flower in Lick Creek Park. College Station, Texas, June 8, 2008
 Violet ruella (Ruellia caroliniensis) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, July 14, 2019
 Blooming violet ruella (Ruellia caroliniensis) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, July 14, 2019
 Flower of violet ruella (Ruellia caroliniensis) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, July 14, 2019
 Back lit violet ruella (Ruellia nudiflora) in Bee Creek Park in College Station, Texas, June 21, 2012
 Backlit flower of violet ruella (Ruellia caroliniensis) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, July 14, 2019
 Back lit violet ruella (Ruellia nudiflora) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 27, 2013
 Back lit Violet ruella (Ruellia nudiflora) west from Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, June 16, 2012
 Wild petunia (Ruellia caroliniensis(?)) 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, September 21, 2024
 Flowers of hairy Ruellia (Ruellia humilis) on Richards Loop Trail in Sam Houston National Forest. Texas, August 7, 2021
 Flowers of hairy Ruellia (Ruellia humilis) on Richards Loop Trail in Sam Houston National Forest. Texas, August 15, 2021
 Flowers of hairy Ruellia (Ruellia humilis) on Richards Loop Trail in Sam Houston National Forest. Texas, July 29, 2021
 Violet ruella (Ruellia nudiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 18, 2010
 Flowers of violet ruella (Ruellia nudiflora) in Lake Bryan Park. Bryan, Texas, July 20, 2014
 Flowers of violet ruella (Ruellia nudiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 31, 2021
 Ruella (Ruellia) on a trail in Mercer Arboretum and Botanical Gardens. Humble (Houston area), Texas, May 15, 2010
 Small flower ruellia (Ruellia caroliniensis) in Mercer Arboretum and Botanical Gardens. Humble (Houston area), Texas, July 20, 2013
 Violet ruella (Ruellia nudiflora) in Bee Creek Park in College Station, Texas, June 21, 2012
 Close up of violet ruella (Ruellia nudiflora) in Bee Creek Park in College Station, Texas, June 21, 2012
 Flowers of Wild petunia (Ruellia caroliniensis) in Mercer Arboretum and Botanical Gardens. Humble (Houston area), Texas, July 18, 2014
 Hairy Ruellia (Ruellia humilis) on Richards Loop Trail in Sam Houston National Forest. Texas, August 15, 2021
 Hairy Ruellia (Ruellia humilis) on Richards Loop Trail in Sam Houston National Forest. Texas, August 7, 2021
 Hairy Ruellia (Ruellia humilis) on Richards Loop Trail in Sam Houston National Forest. Texas, August 7, 2021
 Hairy Ruellia (Ruellia humilis) on Richards Loop Trail in Sam Houston National Forest. Texas, July 29, 2021
 Hairy Ruellia (Ruellia humilis) on Richards Loop Trail in Sam Houston National Forest. Texas, September 8, 2021
 Flower of hairy Ruellia (Ruellia humilis) on Richards Loop Trail in Sam Houston National Forest. Texas, August 7, 2021
 Flower of hairy Ruellia (Ruellia humilis) on Richards Loop Trail in Sam Houston National Forest. Texas, September 8, 2021
 Hairy Ruellia (Ruellia humilis) in a pine forest on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 15, 2019
 Hairy Ruellia (Ruellia humilis) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 15, 2019
 Close-up of a flower of hairy Ruellia (Ruellia humilis) on Richards Loop Trail in Sam Houston National Forest. Texas, August 15, 2021
 Hairy Ruellia (Ruellia humilis) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 29, 2019
 Back lit Violet Wood Sorrel (Oxalis violacea) in Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, October 22, 2011
 Blooming hairy Ruellia (Ruellia humilis) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 15, 2019
 Flower of hairy Ruellia (Ruellia humilis) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 15, 2019
 Close up of hairy Ruellia (Ruellia humilis) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 15, 2019
 Two flowers of black-eyed susan (Rudbeckia hirta) on a trail in Sam Houston National Forest, near Road 149, near Richards. Texas, May 15, 2010
 Close up of a flower of hairy Ruellia (Ruellia humilis) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 15, 2019
 Yellow flowers of black-eyed susan (Rudbeckia hirta) on a trail in Sam Houston National Forest, near Road 149, near Richards. Texas, May 15, 2010
 Violet ruella (Ruellia nudiflora) in Lake Bryan Park. Bryan, Texas, July 20, 2014
 Flower of violet ruella (Ruellia nudiflora) in Lake Bryan Park. Bryan, Texas, July 20, 2014
 Flowers of hairy wild petunia (Ruellia humilis) on Richards Loop Trail in Sam Houston National Forest. Texas, July 12, 2020
 Violet ruella (Ruellia nudiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 12, 2008
 Violet ruella (Ruellia nudiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 28, 2014
 Violet ruella (Ruellia nudiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 31, 2021
 Violet ruella (Ruellia nudiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 24, 2021
 Violet ruella (Ruellia nudiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 14, 2008
 Violet ruella (Ruellia nudiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 8, 2021
 Violet ruella (Ruellia nudiflora) with dew in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 6, 2009
 Violet ruella (Ruellia) flower in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, June 12, 2008
 Blooming violet ruella (Ruellia nudiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 31, 2021
 Violet ruella (Ruellia nudiflora) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 27, 2013
 Flower of violet ruella (Ruellia nudiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 24, 2021
 Violet ruella (Ruellia nudiflora) flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 12, 2008
 Back lit flowers of dewberry on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Back-lit purple flower of wood sorrel in Sam Houston National Forest on Little Lake Creek Loop Trail. Richards, Texas, April 4, 2010.
 Back lit flowers of arrowhead (Sagittaria) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 7, 2013
 Flowers of Violet Wood Sorrel (Oxalis violacea) in Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, October 22, 2011
 Back lit flowers of elephant foot (Elephantopus carolinianus) in Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, September 26, 2009
 Blue thistle on a trail in Sam Houston National Forest, near Road 149, near Richards. Texas, May 15, 2010
 Wild petunia (Ruellia caroliniensis) in Mercer Arboretum and Botanical Gardens. Humble (Houston area), Texas, July 18, 2014
 Floral receptacles of lire-leaf sage on a trail in Sam Houston National Forest, near Road 149, near Richards. Texas, May 15, 2010
 Self-Heal (Carpenter-weed, Prunella vulgaris) on a trail in Sam Houston National Forest, near Road 149, near Richards. Texas, May 15, 2010
 Flower of black-eyed susan (Rudbeckia hirta) on a trail in Sam Houston National Forest, near Road 149, near Richards. Texas, May 15, 2010
 Ruellia flower on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 13, 2014
 Ruellia nudiflora on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 13, 2014
 Yellow flower of black-eyed susan (Rudbeckia hirta) on a trail in Sam Houston National Forest, near Road 149, near Richards. Texas, May 15, 2010
 Flowers of purple dewdrop (Lobelia puberula) in Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, October 2, 2010
 Opening flowers of white milkweed (Asclepias variegata) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, May 8, 2010
 Hairy wild petunia (Ruellia humilis) on Richards Loop Trail in Sam Houston National Forest. Texas, July 12, 2020
 Hairy wild petunia (Ruellia humilis) on Richards Loop Trail in Sam Houston National Forest. Texas, July 28, 2020
 Flower of Ruellia nudiflora on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 13, 2014
 Hairy wild petunia (Ruellia humilis) on Richards Loop Trail in Sam Houston National Forest. Texas, June 9, 2022
 Flower of hairy wild petunia (Ruellia humilis) on Richards Loop Trail in Sam Houston National Forest. Texas, July 28, 2020
 Blooming hairy wild petunia (Ruellia humilis) on Richards Loop Trail in Sam Houston National Forest. Texas, July 12, 2020
 White flowers of blackberry on Road FS 203 near on Richards Loop Trail in Sam Houston National Forest. Texas, March 30, 2024
 Wild petunia (Ruellia caroliniensis) in Lick Creek Park. College Station, Texas, May 2, 2023
 Wild petunia (Ruellia caroliniensis(?)) in Lick Creek Park. College Station, Texas, May 9, 2011
 Flowers of woolly-white (Hymenopappus) on Road FS 203 near Richards Loop Trail in Sam Houston National Forest. Texas, March 30, 2024
 Flowers of woolly-white (Hymenopappus) on Road FS 203 near Richards Loop Trail in Sam Houston National Forest. Texas, March 30, 2024
 Dry flowers of black eyed susan (Rudbeckia hirta) on Forest Service Road 203 near Richards Loop Trail in Sam Houston National Forest. Texas, June 29, 2022
 Three dry flowers of black eyed susan (Rudbeckia hirta) on Forest Service Road 203 near Richards Loop Trail in Sam Houston National Forest. Texas, June 29, 2022
 Half-dry flowers of black eyed susan (Rudbeckia hirta) on Forest Service Road 203 near Richards Loop Trail in Sam Houston National Forest. Texas, June 29, 2022
 Back lit flower of Mexican petunia (Ruellia simplex, Ruellia brittoniana) in a park at Al Intisar Street near a corner with Onaiza. Doha, Qatar, May 3, 2015
 Back lit coreopsis and paintbrush flowers south from Road 390, opposite to Old Baylor Park. Independence, Texas, April 21, 2010
 Mosquito on flowers of woolly-white (Hymenopappus artemisiaefolius) on road FS203 near Richards Loop Trail in Sam Houston National Forest. Texas, April 13, 2024
 Flowers of woolly rosette grass (Dichanthelium scabriusculum) on road FS203 near Richards Loop Trail in Sam Houston National Forest. Texas, April 13, 2024
 Pink flowers of woolly-white (Hymenopappus artemisiaefolius) on road FS203 near Richards Loop Trail in Sam Houston National Forest. Texas, April 13, 2024
 Ruella (Ruellia) in Antique Rose Emporium. Independence, Texas, August 15, 2009
 Ruella (Ruellia) in Antique Rose Emporium. Independence, Texas, August 27, 2021
 Back lit leaves of willow oak on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023
 Back lit young leaves of an oak on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Some young back lit leaves on Richards Loop Trail in Sam Houston National Forest. Texas, April 13, 2024
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