 Shrubby water-primrose (Ludwigia octovalvis) on Richards Loop Trail in Sam Houston National Forest. Texas, July 29, 2021
 Shrubby water-primrose (Ludwigia octovalvis) on Richards Loop Trail in Sam Houston National Forest. Texas, August 7, 2021
 Flower of shrubby water-primrose (Ludwigia octovalvis) on Richards Loop Trail in Sam Houston National Forest. Texas, July 29, 2021
 Close-up of a flower of shrubby water-primrose (Ludwigia octovalvis) on Richards Loop Trail in Sam Houston National Forest. Texas, July 29, 2021
 Water-primrose (Ludwigia) in Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, May 26, 2012
 Flower of water-primrose (Ludwigia) in Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, May 26, 2012
 Shrubby water-primrose (Ludwigia octovalvis) on Richards Loop Trail in Sam Houston National Forest. Texas, June 9, 2022
 Shrubby water-primrose (Ludwigia octovalvis) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 15, 2019
 Blooming shrubby water-primrose (Ludwigia octovalvis) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 15, 2019
 Flower of shrubby water-primrose (Ludwigia octovalvis) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 15, 2019
 Shrubby (narrow-leaf) water-primrose (Ludwigia octovalvis) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 22, 2008
 Yellow flower of shrubby water-primrose (Ludwigia octovalvis) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 15, 2019
 Close up of a flower of shrubby water-primrose (Ludwigia octovalvis) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 15, 2019
 Shrubby water-primrose (Ludwigia octovalvis) on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, June 22, 2021
 Water primrose (Ludwigia) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight collected on Stubblefield section of Lone Star hiking trail in Sam Houston National Forest. Texas, September 15, 2024
 Water-primrose (Ludwigia) in a ditch in Mercer Arboretum and Botanical Gardens. Humble (Houston area), Texas, September 25, 2010
 Shrubby water-primrose (Ludwigia) on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Water primrose (Ludwigia) in Lick Creek Park. College Station, Texas, August 9, 2021
 Water primrose (Ludwigia) in Lick Creek Park. College Station, Texas, August 1, 2021
 Water-primrose (Ludwigia, Onagraceae) in Lick Creek Park. College Station, Texas, August 12, 2021
 Leaves of water primrose (Ludwigia) in Lick Creek Park. College Station, Texas, August 1, 2021
 Flower of water primrose (Ludwigia) in Lick Creek Park. College Station, Texas, August 1, 2021
 Flower of water primrose (Ludwigia) in Lick Creek Park. College Station, Texas, August 1, 2021
 Water primrose (Ludwigia) in Lick Creek Park. College Station, Texas, September 12, 2008
 Nymph of katidid on water primrose (Ludwigia) in Lick Creek Park. College Station, Texas, August 1, 2021
 Virescent green metallic bee on water primrose (Ludwigia) in Lick Creek Park. College Station, Texas, August 1, 2021
 Narrow-leaf water-primrose (Ludwigia octovalvis) in Lick Creek Park. College Station, Texas, August 4, 2021
 Water primrose with narrow leaves (Ludwigia) in Flag Pond on Lake Somerville Trailway near Nails Creek Unit of Somerville Lake State Park. Texas, September 12, 2021
 Blooming narrow-leaf water-primrose (Ludwigia octovalvis) in Lick Creek Park. College Station, Texas, August 4, 2021
 Shoots of water-primrose (Ludwigia) in frequently flooded area in Lick Creek Park. College Station, Texas, December 16, 2021
 Seeds of rattle-box water primrose (Ludwigia alternifolia) in Lick Creek Park. College Station, Texas, September 8, 2023
 Blooming rattle-box water primrose (bushy seedbox, Ludwigia alternifolia) in Lick Creek Park. College Station, Texas, July 28, 2021
 Dry seed capsules of rattle-box water primrose (Ludwigia alternifolia) in Lick Creek Park. College Station, Texas, September 8, 2023
 Yellow flower of rattle-box water primrose (bushy seedbox, Ludwigia alternifolia) in Lick Creek Park. College Station, Texas, July 28, 2021
 Water primrose (Ludwigia) in Bastrop State Park. Bastrop, Texas, September 10, 2020
 Water droplets on a corticioid (crust) fungus on a pine log on Richards Loop Trail in Sam Houston National Forest. Texas, January 9, 2021
 Hornworm of Banded Sphinx Moth (Eumorpha fasciatus) with a leaf of water-primrose (Ludwigia) in Lick Creek Park. College Station, Texas, August 12, 2021
 Hornworm of Banded Sphinx Moth (Eumorpha fasciatus) feeding on water-primrose (Ludwigia) in Lick Creek Park. College Station, Texas, August 12, 2021
 Water primrose (Ludwigia) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Lick Creek Park. College Station, Texas, September 11, 2024
 Water primrose (Ludwigia) with flower buds both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Lick Creek Park. College Station, Texas, September 11, 2024
 Seed heads of rattle-box water primrose (bushy seedbox, Ludwigia alternifolia) in Lick Creek Park. College Station, Texas, September 13, 2023
 Hornworm of Banded Sphinx Moth (Eumorpha fasciatus) with flower buds of water-primrose (Ludwigia) in Lick Creek Park. College Station, Texas, August 12, 2021
 Hornworm of Banded Sphinx Moth (Eumorpha fasciatus) munching a leaf of water-primrose (Ludwigia) in Lick Creek Park. College Station, Texas, August 12, 2021
 Hornworm of Banded Sphinx Moth (Eumorpha fasciatus) eating a leaf of water-primrose (Ludwigia) in Lick Creek Park. College Station, Texas, August 12, 2021
 Water primrose (Ludwigia) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Lick Creek Greenway Trail. College Station, Texas, October 18, 2024
 Shoots of water-primrose (Ludwigia octovalvis)(?) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, March 29, 2021
 Water primrose (Ludwigia) in Lick Creek Park. College Station, Texas, July 15, 2014
 Water-primrose (Ludwigia) in Lick Creek Park. College Station, Texas, July 1, 2014
 Water-primrose (Ludwigia) in Lick Creek Park. College Station, Texas, July 10, 2014
 Water primrose (Ludwigia) in Lick Creek Park. College Station, Texas, July 7, 2012
 Water-primrose (Ludwigia) in Ladybird Johnson Wildflower Center. Austin, Texas, July 26, 2008
 Shoot of water-primrose (Ludwigia) in Lick Creek Park. College Station, Texas, March 2, 2023
 Flower of water primrose (Ludwigia) in Lick Creek Park. College Station, Texas, July 15, 2014
 Shoot of water-primrose (Ludwigia) from Lick Creek Park. College Station, Texas, August 8, 2023
 Water droplets on a margin of orange corticioid fungus Leucogyrophana olivascens (Penttilamyces olivascens, or Serpula, Coniophora) under a log on Richards Loop Trail in Sam Houston National Forest. Texas, October 2, 2021
 Carpet of leaves of water-primrose (Ludwigia) on a shore of Flag Pond at Lake Somerville Trailway near Nails Creek Unit of Somerville Lake State Park. Texas, April 4, 2021
 Green leaves of water-primrose (Ludwigia) on a shore of Flag Pond at Lake Somerville Trailway near Nails Creek Unit of Somerville Lake State Park. Texas, April 4, 2021
 Green shoots of water-primrose (Ludwigia) on a shore of Flag Pond at Lake Somerville Trailway near Nails Creek Unit of Somerville Lake State Park. Texas, April 4, 2021
 Cut-leaved evening primrose (Oenothera laciniata) on Road FS 203 near on Richards Loop Trail in Sam Houston National Forest. Texas, March 30, 2024
 Palafoxia rosea on Richards Loop Trail in Sam Houston National Forest. Texas, September 23, 2021
 Hornworm of Lesser Vine Sphinx Moth (Banded Sphinx Moth, Eumorpha fasciatus) on water-primrose (Ludwigia, Onagraceae) in Lick Creek Park. College Station, Texas, August 12, 2021
 Shrubby water-primrose (Ludwigia octovalvis) in dew in Lick Creek Park. College Station, Texas, July 21, 2019
 Young leaves of water-primrose (Ludwigia) in Lick Creek Park. College Station, Texas, March 2, 2023
 Shrubby water-primrose (Ludwigia octovalvis) in Lick Creek Park. College Station, Texas, July 21, 2019
 Back lit leaves of water-primrose (Ludwigia) in Lick Creek Park. College Station, Texas, March 2, 2023
 Glossy leaves of water-primrose (Ludwigia) from Lick Creek Park. College Station, Texas, August 8, 2023
 Shrubby water-primrose (Ludwigia octovalvis) in Lick Creek Park. College Station, Texas, June 30, 2012
 Shoot of water-primrose (Ludwigia) and red water fern (Azolla filiculoides) on shores of Flag Pond at Lake Somerville Trailway, near Nails Creek Unit of Somerville Lake State Park. Texas, March 8, 2023
 Shoot of water-primrose (Ludwigia) and red water fern (Azolla filiculoides) on shores of Flag Pond at Lake Somerville Trailway, near Nails Creek Unit of Somerville Lake State Park. Texas, March 8, 2023
 Hornworm caterpillar of Lesser Vine Sphinx Moth (Banded Sphinx Moth, Eumorpha fasciatus) on water-primrose (Ludwigia, Onagraceae) in Lick Creek Park. College Station, Texas, August 26, 2021
 Beautyberry (callicarpa americana) on Richards Loop Trail in Sam Houston National Forest. Texas, September 8, 2021
 Black hairy caterpillar on Richards Loop Trail in Sam Houston National Forest. Texas, September 8, 2021
 Yellow-bellied grasshopper on Richards Loop Trail in Sam Houston National Forest. Texas, September 8, 2021
 Green lynx spider on Richards Loop Trail in Sam Houston National Forest. Texas, September 8, 2021
 Caterpillar munching leaf of an oak on Richards Loop Trail in Sam Houston National Forest. Texas, September 8, 2021
 Flowers of Palafoxia rosea on Richards Loop Trail in Sam Houston National Forest. Texas, September 23, 2021
 Sepals of shrubby water-primrose (Ludwigia octovalvis) in Lick Creek Park. College Station, June 15, 2008
 Flower of shrubby water-primrose (Ludwigia octovalvis) in Lick Creek Park. College Station, June 15, 2008
 Narrow-leaf water-primrose (Ludwigia octovalvis) with dew in Lick Creek Park. College Station, June 15, 2008
 Shrubby water-primrose (Ludwigia octovalvis) in Watson Rare Native Plant Preserve. Warren, Texas, August 2, 2014
 Sepals of shrubby water-primrose (Ludwigia octovalvis) in Lick Creek Park. College Station, Texas, June 30, 2012
 Flower of shrubby water-primrose (Ludwigia octovalvis) in Lick Creek Park. College Station, Texas, June 30, 2012
 Flowering spurge (Euphorbia corollata) on Richards Loop Trail in Sam Houston National Forest. Texas, September 8, 2021
 Baby caterpillars eating oak leaves on Richards Loop Trail in Sam Houston National Forest. Texas, September 8, 2021
 Sensitive brier (Schrankia uncinata)(?) on Richards Loop Trail in Sam Houston National Forest. Texas, September 23, 2021
 Purple dewdrop (Lobelia puberula) on Richards Loop Trail in Sam Houston National Forest. Texas, September 8, 2021
 Flowering spurge Euphorbia corollata on Richards Loop Trail in Sam Houston National Forest. Texas, September 23, 2021
 Purple bindweed (Ipomoea cordatotriloba) on Richards Loop Trail in Sam Houston National Forest. Texas, September 8, 2021
 Fruits of beautyberry (callicarpa americana) on Richards Loop Trail in Sam Houston National Forest. Texas, September 8, 2021
 Back segment with prolegs of hornworm of Lesser Vine Sphinx Moth (Banded Sphinx Moth, Eumorpha fasciatus) on water-primrose (Ludwigia, Onagraceae) in Lick Creek Park. College Station, Texas, August 12, 2021
 Shrubby water-primrose (Ludwigia octovalvis) near a pond in Watson Rare Native Plant Preserve. Warren, Texas, August 2, 2014
 Rattle-box water primrose (bushy seedbox, Ludwigia alternifolia) in Lick Creek Park. College Station, Texas, June 3, 2018
 White flowering spurge Euphorbia corollata on Richards Loop Trail in Sam Houston National Forest. Texas, September 8, 2021
 Green lynx spider on gayfeather (Liatris) on Richards Loop Trail in Sam Houston National Forest. Texas, September 8, 2021
 Mistflower (Eupatorium coelestinum, Wild ageratum) on Richards Loop Trail in Sam Houston National Forest. Texas, September 23, 2021
 Mistflower (Eupatorium coelestinum, wild ageratum) on Richards Loop Trail in Sam Houston National Forest. Texas, September 8, 2021
 Mistflower (Eupatorium coelestinum, Wild ageratum) on Richards Loop Trail in Sam Houston National Forest. Texas, September 8, 2021
 Trailing fuzzy-bean (Strophostyles helvola) on Richards Loop Trail in Sam Houston National Forest. Texas, September 8, 2021
 Close-up of flowering spurge Euphorbia corollata on Richards Loop Trail in Sam Houston National Forest. Texas, September 23, 2021
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