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681-14. "Porcupine egg" of cocklebur (Xanthium strumarium) near Onion Creek in McKinney Falls State Park. Austin, Texas, October 26, 2008

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Palafoxia callosa near Onion Creek in McKinney Falls State Park. Austin, Texas, October 26, 2008
Tetrameric flower of water-primrose willowherb (Ludwigia) near Onion Creek in McKinney Falls State Park. Austin, Texas, October 26, 2008
"Porcupine eggs" of cocklebur (Xanthium strumarium) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, July 19, 2020
Onion Creek near Lower McKinney Falls. Austin, Texas, October 26, 2008
Small green flowers of pigeon-berry (Rivina humilis, rouge-plant) in a forest near Onion Creek in McKinney Falls State Park. Austin, Texas, October 26, 2008
Small red berries of pigeon-berry (Rivina humilis, rouge-plant, baby peppers) in a forest near Onion Creek in McKinney Falls State Park. Austin, Texas, October 26, 2008
Creek and a cypress in McKinney Falls State Park, near Upper falls. Austin, Texas, October 26, 2008
Bur of rough Cocklebur (Xanthium strumarium) in Lick Creek Park. College Station, Texas, October 9, 2012
Indian mallow (Abutilon fruticosa) near a parking of Upper falls in McKinney Falls State Park. Austin, Texas, October 26, 2008
Mature bur of Rough Cocklebur (Xanthium strumarium) in Lick Creek Park. College Station, Texas, October 11, 2012
Ripening burs of Rough Cocklebur (Xanthium strumarium) in Lick Creek Park. College Station, Texas, October 11, 2012
Cocklebur (Xanthium strumarium) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, October 16, 2020
Bur of cocklebur (Xanthium strumarium) on north shore of Lake Somerville. Texas, September 27, 2008
Texas aster with variegated fritillary(?) butterfly near a pond of Upper falls in McKinney Falls State Park. Austin, Texas, October 26, 2008
Rough cocklebur (Xanthium strumarium) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, October 6, 2019
Back lit leaves of rough cocklebur (Xanthium strumarium) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, October 6, 2019
Mustard flowers in grist mill in McKinney Falls State Park. Austin, Texas, October 26, 2008
Dwarf yellow butterfly (Dainty Sulphur, Nathalis iole) on Texas aster near a pond of Upper falls in McKinney Falls State Park. Austin, Texas, October 26, 2008
Texas aster (Aster texanus) near a pond of Upper falls in McKinney Falls State Park. Austin, Texas, October 26, 2008
Christmas cholla cactus (Tasajillo, Opuntia leptocaulis) on Homestead Trail in McKinney Falls State Park. Austin, Texas, October 26, 2008
Green bur of Rough Cocklebur (Xanthium strumarium) in Lick Creek Park. College Station, Texas, September 24, 2012
Fall colors of cocklebur (Xanthium strumarium) in Lick Creek Park. College Station, Texas, November 1, 2012
Burs of Rough Cocklebur (Xanthium strumarium) in Lick Creek Park. College Station, Texas, September 24, 2012
Staminate flowers of cocklebur (Xanthium strumarium) in Lick Creek Park. College Station, Texas, September 16, 2012
Cocklebur (Xanthium strumarium) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, November 6, 2020
Shoot of cocklebur (Xanthium strumarium) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, July 19, 2020
Rough Cocklebur (Xanthium strumarium) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, August 3, 2021
Seed capsules of cocklebur (Xanthium strumarium) taken from Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, December 4, 2020
Blooming rough cocklebur (Xanthium strumarium) on a shore of Somerville Lake near Birch Creek Unit of Somerville Lake State Park. Texas, August 29, 2020
Flowers of rough cocklebur (Xanthium strumarium) on a shore of Somerville Lake near Birch Creek Unit of Somerville Lake State Park. Texas, August 29, 2020
Green flowers of cocklebur (Xanthium strumarium) on a shore of Lake Somerville in Birch Creek Unit of Somerville Lake State Park. Texas, September 8, 2012
Staminate flowers of cocklebur (Xanthium strumarium) on a shore of Lake Somerville in Birch Creek Unit of Somerville Lake State Park. Texas, September 8, 2012
Close up of staminate flowers of cocklebur (Xanthium strumarium) on a shore of Lake Somerville in Birch Creek Unit of Somerville Lake State Park. Texas, September 8, 2012
Close-up of seed capsules of cocklebur (Xanthium strumarium) taken from Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, December 4, 2020
Buffalo bur (Solanum rostratum) in McKinney Falls State Park near Austin. Texas, May 10, 2009
Blooming cherry like tree in McKinney Falls State Park. Austin, Texas, March 7, 2009
Blue curls (Fiddleneck, Phacelia congesta) in McKinney Falls State Park near Austin. Texas, May 10, 2009
Water speedwell (Veronica anagalis-aquatica) in McKinney Falls State Park near Austin. Texas, May 10, 2009
Mature seed head of curly dock (Rumex) in McKinney Falls State Park near Austin. Texas, May 10, 2009
Green false nightshade (Chamaesaracha coronopus) near a parking lot in McKinney Falls State Park near Austin. Texas, May 10, 2009
Flowers of Blue curls (Fiddleneck, Phacelia congesta) in McKinney Falls State Park near Austin. Texas, May 10, 2009
Rice stink bug nymph (Oebalus pugnax) on bluestem grass in McKinney Falls State Park near Austin. Texas, May 10, 2009
Lake below the falls in Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
Cypress Pool below the falls in Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
Young leaves of oak in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Leaf of poison ivy in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Young leaves of Virginia creeper in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Tender leaves of Virginia creeper in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Violet flowers of spiderwort (Tradescantia gigantea(?)) in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Violet spiderwort (Tradescantia gigantea(?)) flowers in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Gold dust lichen (Chrysothrix xanthina) in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Lower Falls in Taughannock Falls State Park. Ithaca, New York, October 11, 2005
Bend of Colorado River from Bluff Trail Loop in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Fringed puccoon (Narrowleaf gromwell, Lithospermum incisum) in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Pore lichen (Pertusaria) with apothecia on a juniper branch in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
View of Colorado River from Bluff Trail Loop in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Close-up of pore lichen (Pertusaria) on a juniper branch in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Pore lichen (Pertusaria) on bark of a juniper branch in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Copper-colored young leaves of Virginia creeper in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Medallion lichen Dirinaria confusa on a juniper tree in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Steep descent to Colorado River from Bluff Trail Loop in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
White fringe lichen (Heterodermia albicans) on a tree (may be juniper) in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Whitening pattern of a fungus Robergea albicedrae on bark of Ashe juniper in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Corticioid mushroom Dendrothele nivosa on bark of Eastern red cedar (Juniper) in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Medallion lichen Dirinaria confusa with black apothecia on juniper bark in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Medallion lichen Dirinaria confusa with black apothecia on a juniper tree in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Flowers of wild onion in Lick Creek Park. College Station, Texas, March 27, 2008
Close-up of medallion lichen Dirinaria confusa with black apothecia on juniper bark in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Typical whitening pattern on bark of Ashe juniper with a fungus Robergea albicedrae in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
White juniper fungus (Robergea albicedrae) on bark of Juniperus ashei tree in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Dwarf rosette lichen Physcia neogaea on a dry pad of prickly pear cactus in prairie in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Close-up of corticioid fungus Dendrothele nivosa on bark of Eastern red cedar (Juniper) in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Dwarf rosette lichen Physcia neogaea on a dry pad of prickly pear cactus (Opuntia) in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
White juniper fungus (Robergea albicedrae) on bark of a young Juniperus ashei tree in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Slender orange-bush lichen (Teloschistes exilis) together with Parmotrema and Physcia on an old pad of prickly pear cactus in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
White juniper fungus (Robergea albicedrae) around of a broken branch spot on Juniperus ashei tree in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Loop 360 Pennybacker Bridge and Lake Austin at morning. Austin, Texas, July 26, 2008
Drummond wild onion (Allium drummondii) in dew near Post Oak Trail in Lick Creek Park. College Station, Texas, April 20, 2008
Drummond wild onion (Allium drummondii) near Post Oak Trail in Lick Creek Park. College Station, Texas, April 20, 2008
Salted rock-shield lichen (Xanthoparmelia mexicana) or may be other Xanthoparmelia growing on an exposed flint stone in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
White juniper fungus (Robergea albicedrae) small gray nodules where spores are produced on bark of a young Juniperus ashei tree in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Close-up of white juniper fungus (Robergea albicedrae) small gray nodules where spores are produced on bark of a young Juniperus ashei tree in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Close-up of salted rock-shield lichen (Xanthoparmelia mexicana) or may be other Xanthoparmelia on an exposed flint stone in open area in a forest in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Details of salted rock-shield lichen (Xanthoparmelia mexicana) or may be other Xanthoparmelia on an exposed flint stone in open area in a forest in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Salted rock-shield lichen (Xanthoparmelia mexicana) or may be other Xanthoparmelia on an exposed flint stone in open area near pine and oak forest in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Texture of salted rock-shield lichen (Xanthoparmelia mexicana) or may be other Xanthoparmelia on an exposed flint stone in open area in a forest in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Beach Area in Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
Close-up of stickpins lichen Mycocalicium subtile or may be other Mycocaliciaceae (Mycocalicium, Chaenothecopsis) on a trunk of a juniper tree (Eastern red cedar) on spot where its branch was cut in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Stickpins lichen Mycocalicium subtile or may be other Mycocaliciaceae (Mycocalicium, Chaenothecopsis) on a trunk of a juniper tree (Eastern red cedar) where its branch was cut, around 1.5 meters above ground, in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Salted rock-shield lichen (Xanthoparmelia mexicana) or may be other Xanthoparmelia on an exposed flint stone on rocky soil in sunny area near a forest in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Steel cable suspension bridge downstream from the falls in Chalk Ridge Falls Park, below a dam of Stillhouse Hollow Lake. Belton - Killeen, Texas, August 17, 2008
Cypresses in Beach Area in Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
Area of Trummel Crossing in Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
Roots in north area of Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
Fishing in Cypress Pool in Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
Cypresses in north area of Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
Trunk of a bald cypress below bluffs in Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
Red cypress foliage in north area of Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
Stones downstream from Cypress Pool in Pedernales Falls State Park. Johnson City, Texas, November 2, 2008

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