Cypresses and duckweed in a gutter of Four Mile Bayou Road, Saint Martin Parish. Morgan City, Louisiana, August 20, 2005
Cypress trunks and knees among duckweed near Ring Levee Trail in Barataria Preserve. New Orleans, Louisiana, August 21, 2005
Alligator hiding in duckweed on west side of Elm Lake in Brazos Bend State Park. Needville, Texas, April 11, 2009
Close-up of an alligator head floating in duckweed on west side of Elm Lake in Brazos Bend State Park. Needville, Texas, April 11, 2009
Turtle on a log covered by green duckweed on west side of Elm Lake in Brazos Bend State Park. Needville, Texas, December 14, 2008
Head of alligator in duckweed on west side of Elm Lake in Brazos Bend State Park. Needville, Texas, July 4, 2008
Alligator in duckweed on west side of Elm Lake in Brazos Bend State Park. Needville, Texas, April 22, 2008
Alligator head floating in duckweed on west side of Elm Lake in Brazos Bend State Park. Needville, Texas, April 11, 2009
Duckweed at Ring Levee Trail in Barataria Preserve, south from New Orleans. Louisiana, August 14, 2005
Kenta Canal covered by duckweed, view from a bridge in Barataria Preserve. New Orleans, Louisiana, August 21, 2005
Close-up of an alligator nose and eyes floating in duckweed on west side of Elm Lake in Brazos Bend State Park. Needville, Texas, April 11, 2009
A cypress trunk covered by duckweed near Ring Levee Trail in Barataria Preserve. New Orleans, Louisiana, August 21, 2005
Leaves on duckweed in the canal in Blackstone River and Canal Heritage State Park. Uxbridge, Massachusetts, October 10, 2004
Alligator on duckweed of Kenta Canal, view from Marsh overlook Trail in Barataria Preserve, south from New Orleans. Louisiana, August 13, 2005
Alligator in duckweed on west side of Elm Lake in Brazos Bend State Park. Needville, Texas, July 4, 2008
A dragonfly landed on a live island in duckweed of Kenta Canal in Barataria Preserve, view from Marsh Overlook Trail. New Orleans, Louisiana, June 11, 2005
Alligator in duckweed of Kenta Canal, view from Marsh overlook Trail in Barataria Preserve, south from New Orleans. Louisiana, August 13, 2005
Alligator covered in green duckweed in west side of Elm Lake in Brazos Bend State Park. Needville, Texas, April 22, 2008
Head of an alligator in duckweed in west side of Elm Lake in Brazos Bend State Park. Needville, Texas, April 22, 2008
Alligator in green duckweed in west side of Elm Lake in Brazos Bend State Park. Needville, Texas, April 22, 2008
Duckweed near Chinese Palace in Lomonosov (Oranienbaum). West from Saint Petersburg, Russia, September 11, 2013
Yellow-crowned night-heron in duckweed on north side of 40 Acre Lake in Brazos Bend State Park. Needville, Texas, July 4, 2008
An alligator floating in duckweed of Kenta Canal in Barataria Preserve, view from Marsh Overlook Trail. New Orleans, Louisiana, May 6, 2006
An alligator hiding in duckweed of Kenta Canal in Barataria Preserve, view from Marsh Overlook Trail. New Orleans, Louisiana, June 11, 2005
A baby alligator in duckweed of Kenta Canal in Barataria Preserve, view from Marsh Overlook Trail. New Orleans, Louisiana, April 30, 2006
Fleshy plants floating among duckweed near Ring Levee Trail in Barataria Preserve, south from New Orleans. Louisiana, February 5, 2006
Common duckweed (Lemna minor) and giant duckweed (Spirodela polyrhiza) on a flooded trail at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, July 14, 2019
Texture of common duckweed (Lemna minor) on a flooded trail at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, July 14, 2019
Common duckweed (Lemna minor) together with giant duckweed (Spirodela polyrhiza) on a flooded trail at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, July 14, 2019
Liverwort Fringed Heartwort (Ricciocarpos natans) and Giant salvinia (Salvinia molesta) and tiny duckweed floating in shallow water on mud flats of Lake Conroe on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, February 16, 2020
Duckweed on alligator s head from Spillway Trail in Brazos Bend State Park. Needville, Texas, March 12, 2020
Aquatic fern Giant salvinia (Salvinia molesta) and duckweed in shallow water of Lake Conroe on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, March 29, 2020
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
Common duckweed (Lemna minor) on a flooded trail at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, July 14, 2019
Common duckweed (Lemna minor) together with giant duckweed (Spirodela polyrhiza) floating on a flooded trail at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, July 14, 2019
Alligator covered by duckweed from Spillway Trail in Brazos Bend State Park. Needville, Texas, March 12, 2020
Giant salvinia (Salvinia molesta) together with duckweed in shallow water of a lake extension on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, October 8, 2021
Aquatic fern Salvinia molesta with duckweed floating in shallow water on muddy edge of Lake Conroe on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, January 23, 2022
Giant salvinia (Salvinia molesta) together with duckweed in shallow water of a lake extension on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, June 26, 2022
Floating leaves of giant salvinia (Salvinia molesta) together with duckweed in shallow water of a lake extension on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, June 26, 2022
Duckweed 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
Red water fern (Azolla filiculoides) together with duckweed on shores of Flag Pond at Lake Somerville Trailway, near Nails Creek Unit of Somerville Lake State Park. Texas, March 8, 2023
Red water fern (Azolla filiculoides) overgrowing duckweed on shores of Flag Pond at Lake Somerville Trailway, near Nails Creek Unit of Somerville Lake State Park. Texas, March 8, 2023
Orange-striped ribbonsnake on a carpet of red water fern (Azolla filiculoides) and duckweed on shores of Flag Pond at Lake Somerville Trailway, near Nails Creek Unit of Somerville Lake State Park. Texas, March 8, 2023
Young plants of water hyacinth (Eichhornia crassipes) and duckweed on the lake edge on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, April 11, 2023
Water fern (Azolla) and duckweed in a pond in Bee Creek Park near Texas Avenue. College Station, Texas, November 11, 2024
Water fern (Azolla) and duckweed at sunrise in a pond in Bee Creek Park near Texas Avenue. College Station, Texas, November 11, 2024
Close-up of water fern (Azolla) and duckweed in a pond in Bee Creek Park near Texas Avenue. College Station, Texas, November 11, 2024
Water fern (Azolla) and duckweed both in natural light and under 365 nm ultraviolet (UV-A) blacklight taken from a pond in Bee Creek Park. College Station, Texas, November 11, 2024
Water fern (Azolla) and duckweed when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight in Bee Creek Park. College Station, Texas, November 11, 2024
Green carpet of water fern (Azolla) and duckweed both in natural light and under 365 nm ultraviolet (UV-A) blacklight in Bee Creek Park. College Station, Texas, November 11, 2024
Close-up of water fern (Azolla) and duckweed when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight in Bee Creek Park. College Station, Texas, November 11, 2024
Texture of water fern (Azolla) and duckweed both in natural light and under 365 nm ultraviolet (UV-A) blacklight in Bee Creek Park. College Station, Texas, November 11, 2024
Fluorescence of water fern (Azolla) and duckweed in ultraviolet light in Bee Creek Park. College Station, Texas, November 11, 2024
Carpet of water fern (Azolla) and duckweed when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from a pond in Bee Creek Park. College Station, Texas, November 12, 2024
Close-up of water fern (Azolla) and duckweed both in natural light and under 365 nm ultraviolet (UV-A) blacklight from a pond in Bee Creek Park. College Station, Texas, November 12, 2024
Texture of water fern (Azolla) and duckweed when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from a pond in Bee Creek Park. College Station, Texas, November 12, 2024
Close-up of water fern (Azolla) and duckweed both in natural light and under 365 nm ultraviolet (UV-A) blacklight from a pond in Bee Creek Park. College Station, Texas, November 12, 2024
