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3802-21. Zonation of exposed, sandy shore of Lake Somerville near Birch Creek Unit of Somerville Lake State Park. Texas, February 28, 2026Similar picturesLarge thumbnails | Use small thumbnails | View as slideshow |
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3802-21. Zonation of exposed, sandy shore of Lake Somerville near Birch Creek Unit of Somerville Lake State Park. Texas, February 28, 2026Similar picturesLarge thumbnails | Use small thumbnails | View as slideshow |
 Weathered stump of an oak on exposed sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, February 28, 2026  Animal skull on exposed sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, February 28, 2026  Rosette of leaves of some plant on exposed sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, February 28, 2026  Basal rosette of seaside brookweed (Samolus valerandi) on exposed sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, February 28, 2026  Green mat of terrestrial water-starwort (Callitriche terrestris) on exposed sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, February 28, 2026  Salt-marsh fleabane(?) and terrestrial water-starwort on exposed sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, February 28, 2026  Creeping plant of frog-fruit (Phyla incisa, Lippia, fogfruit) on exposed sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, February 28, 2026  Bright lime-green cushions of Texas balloonwort (Sphaerocarpos texanus) on exposed sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, February 28, 2026  Some plant on exposed shore near Birch Creek Unit of Somerville Lake State Park. Texas, February 28, 2026  This photograph of the exposed, sandy shore of Lake Somerville illustrates a classic ecological phenomenon known as drawdown zone zonation or "strandline" vegetation. The bright green plants are growing in distinct, wavy bands that perfectly trace the historical waterlines of the lake as it slowly receded. Texas, February 28, 2026  Seedling of salt-marsh fleabane(?) on exposed shore near Birch Creek Unit of Somerville Lake State Park. Texas, February 28, 2026  Seaside brookweed (Samolus valerandi) on a sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, February 28, 2026  Young plant of sow thistle (Sonchus oleraceus) on exposed shore near Birch Creek Unit of Somerville Lake State Park. Texas, February 28, 2026  Some shoots on a sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, April 19, 2026  Sandbar on a sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, April 19, 2026  Liverwort Texas balloonwort (Sphaerocarpos texanus) on a lake shore at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, February 6, 2026  Carpet of Texas balloonwort (Sphaerocarpos texanus) on a lake shore at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, February 6, 2026  Weedy plants on a sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, April 19, 2026  White pelicans on a sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, April 19, 2026  Red shank (Persicaria maculosa) on a sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, April 19, 2026  Water-primrose (Ludwigia) on a sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, April 19, 2026  Low water level exposing sandy beach on a shore of Lake Somerville in Birch Creek Unit of Somerville Lake State Park. Texas, November 23, 2023  Alligator weed (Alternanthera philoxeroides) on a sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, April 19, 2026  Branching rush (Juncus prismatocarpus) on a sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, April 19, 2026  Sandbar and shallow pools of water on a sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, April 19, 2026  Leaf of watershield (Brasenia schreberi)? on a sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, April 19, 2026  Young toad on a sandy path on Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, June 28, 2026  Rabbit-foot grass (Polypogon monspeliensis) on a sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, April 19, 2026  Blooming seaside brookweed (Samolus valerandi) on a sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, April 19, 2026  Underside of a leaf of watershield (Brasenia schreberi)? on a sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, April 19, 2026  Creeping love grass (Eragrostis reptans) on a sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, April 19, 2026  Mat of needle spike-rush (Eleocharis acicularis) on a sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, April 19, 2026  Needle spike-rush (Eleocharis acicularis) on a sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, April 19, 2026  Shoots of alligator weed (Alternanthera philoxeroides) on a sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, April 19, 2026  Vetch(?) on sand of a lake shore near Birch Creek Unit of Somerville Lake State Park. Texas, February 28, 2026  Some leaves on sand of a lake shore near Birch Creek Unit of Somerville Lake State Park. Texas, February 28, 2026  Leaves of dock(?) on sand of a lake shore near Birch Creek Unit of Somerville Lake State Park. Texas, February 28, 2026  Flowers of creeping love grass (Eragrostis reptans) on a sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, April 19, 2026  Spiny Chloracantha (Chloracantha spinosa) on a sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, May 16, 2026  Male flowers of creeping love grass (Eragrostis reptans) on a sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, April 19, 2026  Base of barnyard grass (cockspur, Echinochloa crus-galli) on a sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, April 19, 2026  Young plants of salt-marsh fleabane (Pluchea odorata) on a sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, April 19, 2026  Annual trampweed (Facelis retusa) on sand of a lake shore near Birch Creek Unit of Somerville Lake State Park. Texas, February 28, 2026  Spiny Chloracantha (Chloracantha spinosa) on a sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, April 19, 2026  Bloomin plant of cursed buttercup (Ranunculus sceleratus) on a lake shore near Birch Creek Unit of Somerville Lake State Park. Texas, February 28, 2026  Leaves of Carolina bristlemallow (Modiola caroliniana) on sand of a lake shore near Birch Creek Unit of Somerville Lake State Park. Texas, February 28, 2026  Mud flats and various water birds on a shore near Birch Creek Unit of Somerville Lake State Park. Texas, February 28, 2026  Dry tree on the lake shore near a road along north shore of Lake Somerville near Birch Creek Unit Somerville Lake State Park. Texas, March 14, 2018  Dead forest after a flooding on a shore of the lake near a road along north shore of Lake Somerville near Birch Creek Unit Somerville Lake State Park. Texas, March 14, 2018  The lake shore near a road along north shore of Lake Somerville near Birch Creek Unit Somerville Lake State Park. Texas, March 14, 2018  A sprawling, multi-stemmed mat of annual trampweed (Facelis retusa) on sand of a lake shore near Birch Creek Unit of Somerville Lake State Park. Texas, February 28, 2026  Exposed old tree trunk at lake shore near Birch Creek Unit of Somerville Lake State Park. Texas, July 31, 2022  Exposed roots of some tree on a lake shore near Birch Creek Unit of Somerville Lake State Park. Texas, July 4, 2022  Flowers of summer spiderlily (woodland spider-lily, Hymenocallis occidentalis) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, June 28, 2026  Common bladder-moss (Physcomitrium pyriforme) on exposed soil at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, February 24, 2021  Sandy shore of the lake with some small underground critters near Birch Creek Unit of Somerville Lake State Park. Texas, July 21, 2022  Blooming barnyard grass (cockspur, Echinochloa crus-galli) and needle spike-rush (Eleocharis acicularis) on a sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, April 19, 2026  An oak stump which is a relic from the "ghost forests" of the original Post Oak Savannah that was flooded when Somerville Lake was created in the 1960s. along north shore of Lake Somerville near Birch Creek Unit Somerville Lake State Park. Texas, November 23, 2025  Bermudagrass, easily identifiable by its wiry, horizontal runners (stolons) that root directly into the sand at their joints, on a lake shore near Birch Creek Unit of Somerville Lake State Park. Texas, February 28, 2026  Winter basal rosette of Carolina geranium (Geranium carolinianum) on a lake shore near Birch Creek Unit of Somerville Lake State Park. Texas, February 28, 2026  Floating air bubbles on a lake shore near Birch Creek Unit of Somerville Lake State Park. Texas, January 2, 2026  Weathered oak stump on a lake shore near Birch Creek Unit of Somerville Lake State Park. Texas, January 2, 2026  Floating foam on a lake shore near Birch Creek Unit of Somerville Lake State Park. Texas, January 2, 2026  Tracks of a North American Raccoon (Procyon lotor) on a lake shore at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. It is very common to find these "little handprints" along the mudflats of Lake Somerville, especially when water levels are low and animals come to the edge to scavenge. Texas, December 22, 2025  Close-up of Chloracantha spinosa on a shore the lake near Birch Creek Unit of Somerville Lake State Park. Texas, April 19, 2026  Ribs of floating foam on a lake shore near Birch Creek Unit of Somerville Lake State Park. Texas, January 2, 2026  Texture of floating foam on a lake shore near Birch Creek Unit of Somerville Lake State Park. Texas, January 2, 2026  Shell of a freshwater mussel on a lake shore near Birch Creek Unit of Somerville Lake State Park. Texas, January 2, 2026  Mud tracks of white pelicans on the lake shore near Birch Creek Unit of Somerville Lake State Park. Texas, March 21, 2026  Red shank (Persicaria maculosa) on the lake shore near Birch Creek Unit of Somerville Lake State Park. Texas, March 21, 2026  Shells of a freshwater mussel on a lake shore near Birch Creek Unit of Somerville Lake State Park. Texas, January 2, 2026  Pattern of floating foam on a lake shore near Birch Creek Unit of Somerville Lake State Park. Texas, January 2, 2026  Leaves of salt-marsh fleabane (Pluchea odorata, Pluchea purpurescens)(?) on sand of a lake shore near Birch Creek Unit of Somerville Lake State Park. Texas, February 28, 2026  Wavy pattern of floating foam on a lake shore near Birch Creek Unit of Somerville Lake State Park. Texas, January 2, 2026  Young bush of an invasive saltcedar (Tamarix sp.) on a lake shore near Birch Creek Unit of Somerville Lake State Park. Texas, May 16, 2026  Wavy structure of floating foam on a lake shore near Birch Creek Unit of Somerville Lake State Park. Texas, January 2, 2026  Rough surface of floating foam on a lake shore near Birch Creek Unit of Somerville Lake State Park. Texas, January 2, 2026  Lake shore at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, October 6, 2019  Shore of the lake at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, March 12, 2019  Dry oak trees on a lake shore at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, April 20, 2022  Weathered oak stump on a lake shore at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, December 22, 2025  Weathered oak wood on a lake shore at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, December 22, 2025  Some small sedge on a dry lake bottom on a shore of Somerville Lake near Birch Creek Unit of Somerville Lake State Park. Texas, August 29, 2020  Rabbit-foot grass (Polypogon monspeliensis) on the lake shore near Birch Creek Unit of Somerville Lake State Park. Texas, March 21, 2026  "Nature sculpture" from weathered oak wood on a lake shore at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, December 22, 2025  Bluebonnet (lupinus) on a sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, March 26, 2023  Sandy shore of Yegua Creek from Alligator Loop Trail on Lake Somerville Trailway near Nails Creek Unit of Somerville Lake State Park. Texas, November 21, 2020  Seedlings of brookweed (water cabbage, Samolus valerandi) on the lake shore near Birch Creek Unit of Somerville Lake State Park. Texas, March 21, 2026  Skeleton of a freshwater drum (Aplodinotus grunniens) or a catfish on the lake shore near Birch Creek Unit of Somerville Lake State Park. Texas, March 21, 2026  Tracks of a North American Raccoon (Procyon lotor) on a lake shore at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, December 22, 2025  Blooming bluebonnet (lupinus) on a sandy shore near Birch Creek Unit of Somerville Lake State Park. Texas, March 26, 2023  A road on north shore of Lake Somerville near Birch Creek Unit of Somerville Lake State Park. Texas, May 6, 2018  Elm(?) trees on a shore of Somerville Lake near Birch Creek Unit of Somerville Lake State Park. Texas, December 29, 2023  Trees on a shore of Somerville Lake near Birch Creek Unit of Somerville Lake State Park. Texas, December 29, 2023  Rosette of leaves of brookweed (water cabbage, Samolus valerandi) on the lake shore near Birch Creek Unit of Somerville Lake State Park. Texas, March 21, 2026  Little green frog on a shore of Somerville Lake near Birch Creek Unit of Somerville Lake State Park. Texas, August 29, 2020  Wood of a dry oak along north shore of Lake Somerville near Birch Creek Unit Somerville Lake State Park. Texas, November 23, 2025  Skullcap (Scutellaria) on north shore of Lake Somerville near Birch Creek Unit of Somerville Lake State Park. Texas, May 6, 2018  Dead oak tree on a shore of Somerville Lake near Birch Creek Unit of Somerville Lake State Park. Texas, March 1, 2025 |