 Shoot 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
 Water primrose (Ludwigia) in Lick Creek Park. College Station, Texas, August 1, 2021
 Water primrose (Ludwigia) in Lick Creek Park. College Station, Texas, August 9, 2021
 Young leaves of water-primrose (Ludwigia) in Lick Creek Park. College Station, Texas, March 2, 2023
 Back lit leaves of water-primrose (Ludwigia) in Lick Creek Park. College Station, Texas, March 2, 2023
 Water-primrose (Ludwigia, Onagraceae) in Lick Creek Park. College Station, Texas, August 12, 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
 Leaves of water primrose (Ludwigia) in Lick Creek Park. College Station, Texas, August 1, 2021
 Seeds of rattle-box water primrose (Ludwigia alternifolia) in Lick Creek Park. College Station, Texas, September 8, 2023
 Dry seed capsules of rattle-box water primrose (Ludwigia alternifolia) in Lick Creek Park. College Station, Texas, September 8, 2023
 Nymph of katidid 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
 Virescent green metallic bee on water primrose (Ludwigia) in Lick Creek Park. College Station, Texas, August 1, 2021
 Seed heads of rattle-box water primrose (bushy seedbox, Ludwigia alternifolia) in Lick Creek Park. College Station, Texas, September 13, 2023
 Blooming narrow-leaf water-primrose (Ludwigia octovalvis) in Lick Creek Park. College Station, Texas, August 4, 2021
 Hornworm of Banded Sphinx Moth (Eumorpha fasciatus) feeding on water-primrose (Ludwigia) in Lick Creek Park. College Station, Texas, August 12, 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
 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 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) with flower buds 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) in Lick Creek Park. College Station, Texas, July 15, 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 Lick Creek Park. College Station, Texas, September 12, 2008
 Water-primrose (Ludwigia) in Lick Creek Park. College Station, Texas, July 1, 2014
 Flower of water primrose (Ludwigia) in Lick Creek Park. College Station, Texas, July 15, 2014
 Shrubby water-primrose (Ludwigia octovalvis) in Lick Creek Park. College Station, Texas, June 30, 2012
 Shrubby water-primrose (Ludwigia octovalvis) in Lick Creek Park. College Station, Texas, July 21, 2019
 Shrubby water-primrose (Ludwigia octovalvis) in dew in Lick Creek Park. College Station, Texas, July 21, 2019
 Flower of shrubby water-primrose (Ludwigia octovalvis) in Lick Creek Park. College Station, June 15, 2008
 Sepals 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
 Flower of shrubby water-primrose (Ludwigia octovalvis) in Lick Creek Park. College Station, Texas, June 30, 2012
 Sepals of shrubby water-primrose (Ludwigia octovalvis) in Lick Creek Park. College Station, Texas, June 30, 2012
 Shoots of water-primrose (Ludwigia) in frequently flooded area in Lick Creek Park. College Station, Texas, December 16, 2021
 Rattle-box water primrose (bushy seedbox, Ludwigia alternifolia) in Lick Creek Park. College Station, Texas, June 3, 2018
 Flowers of rattle-box water primrose (bushy seedbox, Ludwigia alternifolia) in Lick Creek Park. College Station, Texas, June 3, 2018
 Shrubby (narrow-leaf) water-primrose (Ludwigia octovalvis) flower in Lick Creek Park. College Station, Texas, June 8, 2008
 Blooming rattle-box water primrose (bushy seedbox, Ludwigia alternifolia) in Lick Creek Park. College Station, Texas, July 28, 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
 Yellow flower of rattle-box water primrose (bushy seedbox, Ludwigia alternifolia) in Lick Creek Park. College Station, Texas, July 28, 2021
 Yellow flower of rattle-box water primrose (bushy seedbox, Ludwigia alternifolia) in Lick Creek Park. College Station, Texas, June 3, 2018
 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
 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
 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
 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
 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
 Shoot of water-primrose (Ludwigia) on shores of Lake Somerville near Birch Creek Unit of Somerville Lake State Park. Texas, October 4, 2022
 Young leaves of water-primrose (Ludwigia) on shores of Flag Pond at Lake Somerville Trailway, near Nails Creek Unit of Somerville Lake State Park. Texas, March 8, 2023
 Glossy leaves of water-primrose (Ludwigia) on shores of Flag Pond at Lake Somerville Trailway, near Nails Creek Unit of Somerville Lake State Park. Texas, March 8, 2023
 Small yellow flower of evening primrose or Ludwigia(?) on Post Oak Trail in Lick Creek Park. College Station, Texas, April 16, 2010
 Shrubby water-primrose (Ludwigia) on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Shrubby water-primrose (Ludwigia octovalvis) on Richards Loop Trail in Sam Houston National Forest. Texas, August 7, 2021
 Shrubby water-primrose (Ludwigia octovalvis) in Watson Rare Native Plant Preserve. Warren, Texas, August 2, 2014
 Shrubby water-primrose (Ludwigia octovalvis) near a pond in Watson Rare Native Plant Preserve. Warren, Texas, August 2, 2014
 Small species of Water-primrose (Ludwigia) at a cattle drinking pond near a road along north shore of Lake Somerville near Birch Creek Unit Somerville Lake State Park. Texas, August 29, 2009
 Flower bracts of shrubby water-primrose (Ludwigia octovalvis) near a pond in Watson Rare Native Plant Preserve. Warren, Texas, August 2, 2014
 Tetrameric flower of water-primrose willowherb (Ludwigia) near Onion Creek in McKinney Falls State Park. Austin, Texas, October 26, 2008
 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 Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 15, 2019
 Water primrose (Ludwigia) in Bastrop State Park. Bastrop, Texas, September 10, 2020
 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
 Water-primrose (Ludwigia) in Ladybird Johnson Wildflower Center. Austin, Texas, July 26, 2008
 Shrubby (narrow-leaf) water-primrose (Ludwigia octovalvis) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 22, 2008
 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
 Yellow flower of shrubby water-primrose (Ludwigia octovalvis) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 15, 2019
 Shoots of water-primrose (Ludwigia octovalvis)(?) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, March 29, 2021
 Glossy leaves of water-primrose (Ludwigia) on shores of Lake Somerville near Birch Creek Unit of Somerville Lake State Park. Texas, October 4, 2022
 Water-primrose (Ludwigia) on Richards Loop Trail in Sam Houston National Forest. Texas, September 8, 2021
 Shoot of cocklebur (Xanthium strumarium) with cocklebur rust fungus (Puccinia xanthii), over sewage line in Lick Creek Park. College Station, Texas, August 15, 2023
 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
 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
 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 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
 Water-primrose (Ludwigia) in a ditch in Mercer Arboretum and Botanical Gardens. Humble (Houston area), Texas, September 25, 2010
 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, June 9, 2022
 Rosette of leaves of floating primrose willow (Ludwigia peploides) at water s surface at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, March 12, 2019
 Hornworm of Banded Sphinx Moth (Eumorpha fasciatus) feeding on Ludwigia in Lick Creek Park. College Station, Texas, August 12, 2021
 Floating primrose-willow (Ludwigia peploides) near a pond in Central Park. College Station, Texas, July 8, 2014
 Spreading aquatic plant yellow water-weed (Ludwigia peploides) in a creek in Bee Creek Park. College Station, Texas, May 14, 2018
 Some green shoot in Lick Creek Park. College Station, Texas, March 20, 2023
 Shoot of horseweed(?) in Lick Creek Park. College Station, Texas, March 31, 2023
 Shoot of frostweed in Lick Creek Park. College Station, Texas, March 10, 2023
 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
 Shrubby water-primrose (Ludwigia octovalvis) on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, June 22, 2021
 Shoot of greenbrier (Smilax) in Lick Creek Park. College Station, Texas, March 10, 2023
 Shoot of blackberry (Rubus) in Lick Creek Park. College Station, Texas, March 23, 2023
 Shoot of giant ragweed in Lick Creek Park. College Station, Texas, March 31, 2023
 Shoot of mustang grape in Lick Creek Park. College Station, Texas, March 20, 2023
 Shoot of greenbrier (Smilax) in Lick Creek Park. College Station, Texas, March 23, 2023
 Showy evening primrose (Oenothera speciosa) in Lick Creek Park. College Station, Texas, March 23, 2023
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