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681-14. "Porcupine egg" of cocklebur (Xanthium strumarium) near Onion Creek in McKinney Falls State Park. Austin, Texas, October 26, 2008Similar picturesLarge thumbnails | Use small thumbnails | View as slideshow |
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681-14. "Porcupine egg" of cocklebur (Xanthium strumarium) near Onion Creek in McKinney Falls State Park. Austin, Texas, October 26, 2008Similar picturesLarge thumbnails | Use small thumbnails | View as slideshow |
 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  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  "Porcupine eggs" of cocklebur (Xanthium strumarium) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, July 19, 2020  Creek and a cypress in McKinney Falls State Park, near Upper falls. Austin, Texas, October 26, 2008  Indian mallow (Abutilon fruticosa) near a parking of Upper falls in McKinney Falls State Park. Austin, Texas, October 26, 2008  Texas aster with variegated fritillary(?) butterfly near a pond of Upper falls in McKinney Falls State Park. Austin, Texas, October 26, 2008  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  Cocklebur (Xanthium strumarium) with cocklebur rust fungus (Puccinia xanthii), over sewage line in Lick Creek Park. College Station, Texas, August 15, 2023  Bur of rough Cocklebur (Xanthium strumarium) in Lick Creek Park. College Station, Texas, October 9, 2012  Leaves of cocklebur (Xanthium strumarium) with cocklebur rust fungus (Puccinia xanthii), over sewage line in Lick Creek Park. College Station, Texas, August 15, 2023  Shoot of cocklebur (Xanthium strumarium) with cocklebur rust fungus (Puccinia xanthii), over sewage line in Lick Creek Park. College Station, Texas, August 15, 2023  Texas aster (Aster texanus) near a pond 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  Christmas cholla cactus (Tasajillo, Opuntia leptocaulis) on Homestead Trail in McKinney Falls State Park. Austin, Texas, October 26, 2008  Bur of cocklebur (Xanthium strumarium) on north shore of Lake Somerville. Texas, September 27, 2008  Ripening burs of Rough Cocklebur (Xanthium strumarium) in Lick Creek Park. College Station, Texas, October 11, 2012  Underside of leaves of cocklebur (Xanthium strumarium) damaged by cocklebur rust fungus (Puccinia xanthii), collected over sewage line in Lick Creek Park a day before. College Station, Texas, August 13, 2023  Upper and lowers sides of leaves of cocklebur (Xanthium strumarium) with cocklebur rust fungus (Puccinia xanthii), over sewage line in Lick Creek Park. College Station, Texas, August 15, 2023  Teliospores (in KOH) of cocklebur rust fungus (Puccinia xanthii) from underside of leaves of cocklebur (Xanthium strumarium), collected over sewage line in Lick Creek Park a day before. College Station, Texas, August 13, 2023  Details of teliospores (in KOH) of cocklebur rust fungus (Puccinia xanthii) from underside of leaves of cocklebur (Xanthium strumarium), collected over sewage line in Lick Creek Park a day before. College Station, Texas, August 13, 2023  Biseptate teliospores (in KOH) of cocklebur rust fungus (Puccinia xanthii) from underside of leaves of cocklebur (Xanthium strumarium), collected over sewage line in Lick Creek Park a day before. College Station, Texas, August 13, 2023  Teliospores (in KOH, low magnification) of cocklebur rust fungus (Puccinia xanthii) from underside of leaves of cocklebur (Xanthium strumarium) collected over sewage line in Lick Creek Park a day before. College Station, Texas, August 13, 2023  Large teliospores (in KOH) of cocklebur rust fungus (Puccinia xanthii) from underside of leaves of cocklebur (Xanthium strumarium), collected over sewage line in Lick Creek Park a day before. College Station, Texas, August 13, 2023  Cocklebur (Xanthium strumarium) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, October 16, 2020  Rough cocklebur (Xanthium strumarium) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, October 31, 2021  Rough cocklebur (Xanthium strumarium) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, October 6, 2019  Dry last year cocklebur (Xanthium strumarium) on a trailway near Birch Creek Unit of Somerville Lake State Park. Texas, March 5, 2023  Dry seeds of rough cocklebur (Xanthium strumarium) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, October 31, 2021  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  Flowers of cocklebur (Xanthium strumarium) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Birch Creek Unit of Somerville Lake State Park. Texas, September 14, 2024  Cocklebur (Xanthium strumarium) in Lick Creek Park. College Station, Texas, September 13, 2023  Burs of cocklebur (Xanthium strumarium) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Birch Creek Unit of Somerville Lake State Park. Texas, September 14, 2024  Blooming cocklebur (Xanthium strumarium) in Lick Creek Park. College Station, Texas, September 29, 2022  Seeds of cocklebur (Xanthium strumarium) in Lick Creek Park. College Station, Texas, June 22, 2022  Burs of Rough Cocklebur (Xanthium strumarium) in Lick Creek Park. College Station, Texas, September 24, 2012  Green bur 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  Green burs of cocklebur (Xanthium strumarium) in Lick Creek Park. College Station, Texas, September 29, 2022  Fall colors of cocklebur (Xanthium strumarium) in Lick Creek Park. College Station, Texas, November 1, 2012  Cocklebur (Xanthium strumarium) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, November 6, 2020  Dry burs of cocklebur (Xanthium strumarium) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, December 20, 2021  Rough Cocklebur (Xanthium strumarium) on Lake Somerville Trailway near Nails Creek Unit of Somerville Lake State Park. Texas, September 12, 2021  Rough Cocklebur (Xanthium strumarium) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, August 3, 2021  Shoot of cocklebur (Xanthium strumarium) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, July 19, 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  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  Grasshopper on rough cocklebur (Xanthium strumarium) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, September 19, 2021  Blooming rough cocklebur (Xanthium strumarium) on a shore of Somerville Lake near Birch Creek Unit of Somerville Lake State Park. Texas, August 29, 2020  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  Seed capsules of cocklebur (Xanthium strumarium) taken from Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, December 4, 2020  Flowers of rough cocklebur (Xanthium strumarium) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, August 29, 2021  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  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  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  Water speedwell (Veronica anagalis-aquatica) in McKinney Falls State Park near Austin. Texas, May 10, 2009  Blue curls (Fiddleneck, Phacelia congesta) 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  Lower Falls in Taughannock Falls State Park. Ithaca, New York, October 11, 2005  Tender leaves of Virginia creeper 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  Gold dust lichen (Chrysothrix xanthina) 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  Violet flowers of spiderwort (Tradescantia gigantea(?)) 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  Pore lichen (Pertusaria) on bark of a juniper branch 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  Bend of Colorado River from Bluff Trail Loop 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  Pore lichen (Pertusaria) with apothecia on a juniper branch 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  Close-up of pore lichen (Pertusaria) on a juniper branch 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  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  Corticioid mushroom Dendrothele nivosa on bark of Eastern red cedar (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  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  Close-up of medallion lichen Dirinaria confusa with black apothecia on juniper bark 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  Typical whitening pattern on bark of Ashe juniper with a fungus Robergea albicedrae 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  White juniper fungus (Robergea albicedrae) on bark of Juniperus ashei tree 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  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  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  Loop 360 Pennybacker Bridge and Lake Austin at morning. Austin, Texas, July 26, 2008 |
