![](../../pictures/archives/compress/2020/2694/jpeg/12t.jpg) Duckweed and yellow water-weed (Ludwigia peploides) in Flag Pond on Lake Somerville Trailway near Nails Creek Unit of Somerville Lake State Park. Texas, April 26, 2020
![](../../pictures/archives/compress/2010/865/jpeg/01t.jpg) Yellow Water-weed (Ludwigia peploides) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 29, 2010
![](../../pictures/archives/compress/2010/888/jpeg/21t.jpg) Yellow Water-weed (Ludwigia peploides) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 29, 2010
![](../../pictures/archives/compress/2010/888/jpeg/22t.jpg) Back lit yellow Water-weed (Ludwigia peploides) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 29, 2010
![](../../pictures/archives/compress/2018/2280/jpeg/05t.jpg) Yellow flower of rattle-box water primrose (bushy seedbox, Ludwigia alternifolia) in Lick Creek Park. College Station, Texas, June 3, 2018
![](../../pictures/archives/compress/2014/1452/jpeg/11t.jpg) Yellow flower of floating primrose-willow (Ludwigia peploides) near a pond in Central Park. College Station, Texas, July 8, 2014
![](../../pictures/archives/compress/2021/2878/jpeg/05t.jpg) Some semi-aquatic plant, may be water primrose (Ludwigia), together with Texas balloonwort (Sphaerocarpos texanus) on a muddy shore of Flag Pond on Lake Somerville Trailway near Nails Creek Unit of Somerville Lake State Park. Texas, March 10, 2021
![](../../pictures/archives/compress/2021/2993/jpeg/16t.jpg) Yellow flower of rattle-box water primrose (bushy seedbox, Ludwigia alternifolia) in Lick Creek Park. College Station, Texas, July 28, 2021
![](../../pictures/archives/compress/2018/2280/jpeg/06t.jpg) Rattle-box water primrose (bushy seedbox, Ludwigia alternifolia) in Lick Creek Park. College Station, Texas, June 3, 2018
![](../../pictures/archives/compress/2018/2280/jpeg/12t.jpg) Flowers of rattle-box water primrose (bushy seedbox, Ludwigia alternifolia) in Lick Creek Park. College Station, Texas, June 3, 2018
![](../../pictures/archives/compress/2019/2464/jpeg/02t.jpg) 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
![](../../pictures/archives/compress/2014/1452/jpeg/10t.jpg) Floating primrose-willow (Ludwigia peploides) near a pond in Central Park. College Station, Texas, July 8, 2014
![](../../pictures/archives/compress/2014/1452/jpeg/15t.jpg) Water-primrose (Ludwigia) in Lick Creek Park. College Station, Texas, July 10, 2014
![](../../pictures/archives/compress/2014/1448/jpeg/02t.jpg) Water-primrose (Ludwigia) in Lick Creek Park. College Station, Texas, July 1, 2014
![](../../pictures/archives/compress/2021/2997/jpeg/06t.jpg) Water primrose (Ludwigia) in Lick Creek Park. College Station, Texas, August 1, 2021
![](../../pictures/archives/compress/2014/1457/jpeg/09t.jpg) Water primrose (Ludwigia) in Lick Creek Park. College Station, Texas, July 15, 2014
![](../../pictures/archives/compress/2021/3004/jpeg/10t.jpg) Water primrose (Ludwigia) in Lick Creek Park. College Station, Texas, August 9, 2021
![](../../pictures/archives/compress/2008/669/jpeg/16t.jpg) Water primrose (Ludwigia) in Lick Creek Park. College Station, Texas, September 12, 2008
![](../../pictures/archives/compress/2012/1076/jpeg/10t.jpg) Water primrose (Ludwigia) in Lick Creek Park. College Station, Texas, July 7, 2012
![](../../pictures/archives/compress/2021/2997/jpeg/16t.jpg) Leaves of water primrose (Ludwigia) in Lick Creek Park. College Station, Texas, August 1, 2021
![](../../pictures/archives/compress/2023/3352/jpeg/20t.jpg) Shoot of water-primrose (Ludwigia) in Lick Creek Park. College Station, Texas, March 2, 2023
![](../../pictures/archives/compress/2021/3005/jpeg/22t.jpg) Water-primrose (Ludwigia, Onagraceae) in Lick Creek Park. College Station, Texas, August 12, 2021
![](../../pictures/archives/compress/2021/2997/jpeg/07t.jpg) Flower of water primrose (Ludwigia) in Lick Creek Park. College Station, Texas, August 1, 2021
![](../../pictures/archives/compress/2021/2997/jpeg/25t.jpg) Flower of water primrose (Ludwigia) in Lick Creek Park. College Station, Texas, August 1, 2021
![](../../pictures/archives/compress/2023/3411/jpeg/16t.jpg) Shoot of water-primrose (Ludwigia) from Lick Creek Park. College Station, Texas, August 8, 2023
![](../../pictures/archives/compress/2014/1457/jpeg/11t.jpg) Flower of water primrose (Ludwigia) in Lick Creek Park. College Station, Texas, July 15, 2014
![](../../pictures/archives/compress/2016/1835/jpeg/02t.jpg) Spreading plant of water morning glory (water spinach, water convolvulus, Ipomoea aquatica) on a sewage pond near Irkhaya (Irkaya) Farms. Qatar, June 3, 2016
![](../../pictures/archives/compress/2021/2997/jpeg/33t.jpg) Nymph of katidid on water primrose (Ludwigia) in Lick Creek Park. College Station, Texas, August 1, 2021
![](../../pictures/archives/compress/2012/1074/jpeg/12t.jpg) Shrubby water-primrose (Ludwigia octovalvis) in Lick Creek Park. College Station, Texas, June 30, 2012
![](../../pictures/archives/compress/2019/2555/jpeg/10t.jpg) Shrubby water-primrose (Ludwigia octovalvis) in dew in Lick Creek Park. College Station, Texas, July 21, 2019
![](../../pictures/archives/compress/2019/2555/jpeg/06t.jpg) Shrubby water-primrose (Ludwigia octovalvis) in Lick Creek Park. College Station, Texas, July 21, 2019
![](../../pictures/archives/compress/2023/3411/jpeg/17t.jpg) Glossy leaves of water-primrose (Ludwigia) from Lick Creek Park. College Station, Texas, August 8, 2023
![](../../pictures/archives/compress/2023/3352/jpeg/23t.jpg) Young leaves of water-primrose (Ludwigia) in Lick Creek Park. College Station, Texas, March 2, 2023
![](../../pictures/archives/compress/2023/3352/jpeg/24t.jpg) Back lit leaves of water-primrose (Ludwigia) in Lick Creek Park. College Station, Texas, March 2, 2023
![](../../pictures/archives/compress/2008/652/jpeg/07t.jpg) Narrow-leaf water-primrose (Ludwigia octovalvis) with dew in Lick Creek Park. College Station, June 15, 2008
![](../../pictures/archives/compress/2008/651/jpeg/25t.jpg) Flower of shrubby water-primrose (Ludwigia octovalvis) in Lick Creek Park. College Station, June 15, 2008
![](../../pictures/archives/compress/2008/651/jpeg/24t.jpg) Sepals of shrubby water-primrose (Ludwigia octovalvis) in Lick Creek Park. College Station, June 15, 2008
![](../../pictures/archives/compress/2021/2999/jpeg/21t.jpg) Narrow-leaf water-primrose (Ludwigia octovalvis) in Lick Creek Park. College Station, Texas, August 4, 2021
![](../../pictures/archives/compress/2012/1074/jpeg/10t.jpg) Sepals of shrubby water-primrose (Ludwigia octovalvis) in Lick Creek Park. College Station, Texas, June 30, 2012
![](../../pictures/archives/compress/2012/1074/jpeg/11t.jpg) Flower of shrubby water-primrose (Ludwigia octovalvis) in Lick Creek Park. College Station, Texas, June 30, 2012
![](../../pictures/archives/compress/2021/2997/jpeg/34t.jpg) Virescent green metallic bee on water primrose (Ludwigia) in Lick Creek Park. College Station, Texas, August 1, 2021
![](../../pictures/archives/compress/2023/3413/jpeg/15t.jpg) Seeds of rattle-box water primrose (Ludwigia alternifolia) in Lick Creek Park. College Station, Texas, September 8, 2023
![](../../pictures/archives/compress/2023/3413/jpeg/24t.jpg) Dry seed capsules of rattle-box water primrose (Ludwigia alternifolia) in Lick Creek Park. College Station, Texas, September 8, 2023
![](../../pictures/archives/compress/2021/2999/jpeg/22t.jpg) Blooming narrow-leaf water-primrose (Ludwigia octovalvis) in Lick Creek Park. College Station, Texas, August 4, 2021
![](../../pictures/archives/compress/2021/3082/jpeg/04t.jpg) Shoots of water-primrose (Ludwigia) in frequently flooded area in Lick Creek Park. College Station, Texas, December 16, 2021
![](../../pictures/archives/compress/2018/2240/jpeg/09t.jpg) Yellow-Bellied Water Snake, Nerodia erythrogaster(?), in Lick Creek Park. College Station, Texas, March 29, 2018
![](../../pictures/archives/compress/2021/2993/jpeg/19t.jpg) Blooming rattle-box water primrose (bushy seedbox, Ludwigia alternifolia) in Lick Creek Park. College Station, Texas, July 28, 2021
![](../../pictures/archives/compress/2008/650/jpeg/17t.jpg) Shrubby (narrow-leaf) water-primrose (Ludwigia octovalvis) flower in Lick Creek Park. College Station, Texas, June 8, 2008
![](../../pictures/archives/compress/2023/3416/jpeg/13t.jpg) Seed heads of rattle-box water primrose (bushy seedbox, Ludwigia alternifolia) in Lick Creek Park. College Station, Texas, September 13, 2023
![](../../pictures/archives/compress/2024/3618/jpeg/18t.jpg) 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
![](../../pictures/archives/compress/2024/3618/jpeg/19t.jpg) 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
![](../../pictures/archives/compress/2021/3006/jpeg/04t.jpg) Hornworm of Banded Sphinx Moth (Eumorpha fasciatus) with a leaf of water-primrose (Ludwigia) in Lick Creek Park. College Station, Texas, August 12, 2021
![](../../pictures/archives/compress/2021/3006/jpeg/01t.jpg) Hornworm of Banded Sphinx Moth (Eumorpha fasciatus) feeding on water-primrose (Ludwigia) in Lick Creek Park. College Station, Texas, August 12, 2021
![](../../pictures/archives/compress/2021/3006/jpeg/02t.jpg) Hornworm of Banded Sphinx Moth (Eumorpha fasciatus) munching a leaf of water-primrose (Ludwigia) in Lick Creek Park. College Station, Texas, August 12, 2021
![](../../pictures/archives/compress/2021/3006/jpeg/07t.jpg) Hornworm of Banded Sphinx Moth (Eumorpha fasciatus) with flower buds of water-primrose (Ludwigia) in Lick Creek Park. College Station, Texas, August 12, 2021
![](../../pictures/archives/compress/2021/3006/jpeg/03t.jpg) Hornworm of Banded Sphinx Moth (Eumorpha fasciatus) eating a leaf of water-primrose (Ludwigia) in Lick Creek Park. College Station, Texas, August 12, 2021
![](../../pictures/archives/compress/2010/854/jpeg/18t.jpg) Small yellow flower of evening primrose or Ludwigia(?) on Post Oak Trail in Lick Creek Park. College Station, Texas, April 16, 2010
![](../../pictures/archives/compress/2019/2529/jpeg/01t.jpg) Yellow flower of shrubby water-primrose (Ludwigia octovalvis) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 15, 2019
![](../../pictures/archives/compress/2018/2272/jpeg/06t.jpg) Brown crust fungus (Hypoxylaceae) spreading on a log in Lick Creek Park. College Station, Texas, May 28, 2018
![](../../pictures/archives/compress/2024/3470/jpeg/23t.jpg) Seedling of a dicotyledon plant narrowleaf marsh elder (Iva angustifolia) near a water treatment plant in Lick Creek Park. College Station, Texas, February 13, 2024
![](../../pictures/archives/compress/2024/3632/jpeg/16t.jpg) 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
![](../../pictures/archives/compress/2021/2878/jpeg/18t.jpg) Mat of a semi-aquatic plant terrestrial water-starwort (Callitriche terrestris) with tiny leaves on a muddy shore of Flag Pond on Lake Somerville Trailway near Nails Creek Unit of Somerville Lake State Park. Texas, March 10, 2021
![](../../pictures/archives/compress/2024/3474/jpeg/11t.jpg) Seedlings of a dicotyledon plant narrowleaf marsh elder (Iva angustifolia) on Raccoon Run Trail west from a water treatment plant in Lick Creek Park. College Station, Texas, February 19, 2024
![](../../pictures/archives/compress/2024/3468/jpeg/01t.jpg) Seedlings of a dicotyledon plant narrowleaf marsh elder (Iva angustifolia) on Raccoon Run Trail west from a water treatment plant in Lick Creek Park. College Station, Texas, February 5, 2024
![](../../pictures/archives/compress/2021/3005/jpeg/23t.jpg) 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
![](../../pictures/archives/compress/2024/3464/jpeg/15t.jpg) Chloroplasts in a leaf of a seedling of a dicotyledon plant narrowleaf marsh elder (Iva angustifolia) west from a water treatment plant, collected in Lick Creek Park. College Station, Texas, January 29, 2024
![](../../pictures/archives/compress/2021/2878/jpeg/19t.jpg) Some semi-aquatic plant with tiny yellow flowers on a muddy shore of Flag Pond on Lake Somerville Trailway near Nails Creek Unit of Somerville Lake State Park. Texas, March 10, 2021
![](../../pictures/archives/compress/2021/3012/jpeg/31t.jpg) 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
![](../../pictures/archives/compress/2024/3468/jpeg/02t.jpg) Close-up of seedlings of a dicotyledon plant narrowleaf marsh elder (Iva angustifolia) on a road over a sewage pipeline west from a water treatment plant in Lick Creek Park. College Station, Texas, February 5, 2024
![](../../pictures/archives/compress/2024/3468/jpeg/03t.jpg) Cluster of seedlings of a dicotyledon plant narrowleaf marsh elder (Iva angustifolia) on a road over a sewage pipeline west from a water treatment plant in Lick Creek Park. College Station, Texas, February 5, 2024
![](../../pictures/archives/compress/2024/3464/jpeg/14t.jpg) Stomata in epidermis of a leaf of a seedling of a dicotyledon plant narrowleaf marsh elder (Iva angustifolia) west from a water treatment plant, collected in Lick Creek Park. College Station, Texas, January 29, 2024
![](../../pictures/archives/compress/2024/3464/jpeg/13t.jpg) Chloroplasts (at low magnification) in a leaf of a seedling of a dicotyledon plant narrowleaf marsh elder (Iva angustifolia) west from a water treatment plant, collected in Lick Creek Park. College Station, Texas, January 29, 2024
![](../../pictures/archives/compress/2024/3468/jpeg/04t.jpg) Compact cluster of seedlings of a dicotyledon plant narrowleaf marsh elder (Iva angustifolia) on a road over a sewage pipeline west from a water treatment plant in Lick Creek Park. College Station, Texas, February 5, 2024
![](../../pictures/archives/compress/2024/3468/jpeg/05t.jpg) Tight accumulations of seedlings of a dicotyledon plant narrowleaf marsh elder (Iva angustifolia) on a road over a sewage pipeline west from a water treatment plant in Lick Creek Park. College Station, Texas, February 5, 2024
![](../../pictures/archives/compress/2024/3459/jpeg/13t.jpg) Seedling of a dicotyledon plant narrowleaf marsh elder (Iva angustifolia) collected and deposited by rainwater on Raccoon Run Trail west from a water treatment plant in Lick Creek Park. College Station, Texas, January 18, 2024
![](../../pictures/archives/compress/2021/3005/jpeg/24t.jpg) 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
![](../../pictures/archives/compress/2018/2280/jpeg/27t.jpg) Resupinate polypore fungus Oxyporus latemarginatus (Emmia latemarginata) spreading on a dried thin oak in Lick Creek Park. College Station, Texas, June 3, 2018
![](../../pictures/archives/compress/2023/3360/jpeg/02t.jpg) 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
![](../../pictures/archives/compress/2023/3359/jpeg/11t.jpg) 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
![](../../pictures/archives/compress/2014/1471/jpeg/08t.jpg) Shrubby water-primrose (Ludwigia octovalvis) in Watson Rare Native Plant Preserve. Warren, Texas, August 2, 2014
![](../../pictures/archives/compress/2018/2261/jpeg/15t.jpg) Parasol flower head of false bishop s weed (Ammi majus) in Lick Creek Park. College Station, Texas, May 17, 2018
![](../../pictures/archives/compress/2018/2284/jpeg/20t.jpg) Spreading yellow and dark-brown fungus Hypoxylon rubiginosum(?) on underside of a piece of wood on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest, near Huntsville. Texas, June 9, 2018
![](../../pictures/archives/compress/2023/3331/jpeg/15t.jpg) Aquatic plant twoheaded water-starwort (Callitriche heterophylla) at the bottom of Toad Pond near Roosevelt Cutoff Trail in Bastrop State Park. Bastrop, Texas, January 21, 2023
![](../../pictures/archives/compress/2014/1471/jpeg/17t.jpg) Shrubby water-primrose (Ludwigia octovalvis) near a pond in Watson Rare Native Plant Preserve. Warren, Texas, August 2, 2014
![](../../pictures/archives/compress/2008/640/jpeg/02t.jpg) Drops of water on leaves of pea-like plant Tephrosia onobrychoides in Lick Creek Park. College Station, Texas, May 5, 2008
![](../../pictures/archives/compress/2007/603/jpeg/08t.jpg) Sewage line right of way near a water treatment plant in fog in Lick Creek Park. College Station, Texas, November 5, 2007
![](../../pictures/archives/compress/2008/665/jpeg/09t.jpg) Sewage line right of way near water treatment plant in fog in Lick Creek Park. College Station, Texas, August 16, 2008
![](../../pictures/archives/compress/2017/2198/jpeg/08t.jpg) Close up of spreading yellow tooth fungus Hydnophlebia chrysorhiza (former Phanerochaete chrysorhiza) on a wet log near a creek on Kiwanis Nature Trail. College Station, Texas, November 12, 2017
![](../../pictures/archives/compress/2018/2284/jpeg/23t.jpg) Yellow and dark-brown Hypoxylon rubiginosum(?) crust fungus spreading on underside of a piece of wood on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest, near Huntsville. Texas, June 9, 2018
![](../../pictures/archives/compress/2011/965/jpeg/25t.jpg) Flower of water lily in aquatic plant greenhouse in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, June 18, 2011
![](../../pictures/archives/compress/2008/665/jpeg/10t.jpg) Sewage line right of way near water treatment plant in mist in Lick Creek Park. College Station, Texas, August 16, 2008
![](../../pictures/archives/compress/2007/567/jpeg/06t.jpg) Icy glazed logs near water treatment plant in Lick Creek Park after ice storm. College Station, Texas, January 17, 2007
![](../../pictures/archives/compress/2008/665/jpeg/12t.jpg) Trees on sewage line right of way near water treatment plant in fog in Lick Creek Park. College Station, Texas, August 16, 2008
![](../../pictures/archives/compress/2010/897/jpeg/24t.jpg) Forest near water treatment plant from Racoon Run Trail in Lick Creek Park. College Station, Texas, November 17, 2010
![](../../pictures/archives/compress/2007/601/jpeg/20t.jpg) Sewage line right of way near a water treatment plant in mist in Lick Creek Park. College Station, Texas, October 17, 2007
![](../../pictures/archives/compress/2007/601/jpeg/21t.jpg) Sewage line right of way with a water treatment plant in background in Lick Creek Park. College Station, Texas, October 17, 2007
![](../../pictures/archives/compress/2007/603/jpeg/04t.jpg) Sewage line right of way near a water treatment plant in mist in Lick Creek Park. College Station, Texas, November 5, 2007
![](../../pictures/archives/compress/2008/665/jpeg/11t.jpg) Forest on Sewage line right of way near water treatment plant in fog in Lick Creek Park. College Station, Texas, August 16, 2008
![](../../pictures/archives/compress/2014/1471/jpeg/18t.jpg) Flower bracts of shrubby water-primrose (Ludwigia octovalvis) near a pond in Watson Rare Native Plant Preserve. Warren, Texas, August 2, 2014
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