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 Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, May 26, 2012
Violet ruella (Ruellia nudiflora) in Sam Houston National Forest, on Little Lake Creek Loop Trail. Richards, Texas, May 18, 2014
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
Flower of 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
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, July 29, 2021
Flowers of hairy Ruellia (Ruellia humilis) on Richards Loop Trail in Sam Houston National Forest. Texas, August 15, 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 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
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 15, 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
Hairy Ruellia (Ruellia humilis) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 29, 2019
Close-up of a flower of hairy Ruellia (Ruellia humilis) on Richards Loop Trail in Sam Houston National Forest. Texas, August 15, 2021
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
Close up of 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
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 31, 2021
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, August 8, 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, June 28, 2014
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
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
Violet ruella (Ruellia nudiflora) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 27, 2013
Blooming violet ruella (Ruellia nudiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 31, 2021
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
Self-Heal (Carpenter-weed, Prunella vulgaris) on a trail in Sam Houston National Forest, near Road 149, near Richards. Texas, May 15, 2010
Floral receptacles of lire-leaf sage 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 28, 2020
Hairy wild petunia (Ruellia humilis) on Richards Loop Trail in Sam Houston National Forest. Texas, June 9, 2022
Hairy wild petunia (Ruellia humilis) on Richards Loop Trail in Sam Houston National Forest. Texas, July 12, 2020
Flower of Ruellia nudiflora on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 13, 2014
Blooming hairy wild petunia (Ruellia humilis) on Richards Loop Trail in Sam Houston National Forest. Texas, July 12, 2020
Flower of hairy wild petunia (Ruellia humilis) on Richards Loop Trail in Sam Houston National Forest. Texas, July 28, 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 9, 2011
Wild petunia (Ruellia caroliniensis) in Lick Creek Park. College Station, Texas, May 2, 2023
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
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
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
Pink flowers of woolly-white (Hymenopappus artemisiaefolius) on road FS203 near Richards Loop Trail in Sam Houston National Forest. Texas, April 13, 2024
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
Ruella (Ruellia) in Antique Rose Emporium. Independence, Texas, August 27, 2021
Ruella (Ruellia) in Antique Rose Emporium. Independence, Texas, August 15, 2009
Some young back lit leaves on Richards Loop Trail in Sam Houston National Forest. Texas, April 13, 2024
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
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