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 3615-12. Violet wood sorrel (Oxalis violacea) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 6, 2024

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Violet wood sorrel (Oxalis violacea) on Richards Loop Trail in Sam Houston National Forest. Texas, March 3, 2024
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Violet Wood Sorrel (Oxalis violacea) on Richards Loop Trail in Sam Houston National Forest. Montgomery County, Texas, March 22, 2026
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Violet wood sorrel (shamrock, Oxalis violacea) on Richards Loop Trail in Sam Houston National Forest. Texas, March 26, 2020
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Violet wood sorrel (shamrock, Oxalis violacea) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
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Back lit Violet Wood Sorrel (Oxalis violacea) in Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, October 22, 2011
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Flower of Violet Wood Sorrel (Oxalis violacea) in Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, October 22, 2011
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Flowers of Violet Wood Sorrel (Oxalis violacea) in Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, October 22, 2011
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Violet Wood Sorrel (Oxalis violacea) blooming at fall without leaves in Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, October 22, 2011
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Violet wood sorrel (Oxalis violacea) on Lone Star Hiking Trail in Sam Houston National Forest west from Richards. Texas, April 9, 2019
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Flower of violet wood sorrel (Oxalis violacea) on Lone Star Hiking Trail in Sam Houston National Forest west from Richards. Texas, April 9, 2019
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Cap of a brittlegill (Russula) mushroom both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 6, 2024
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Section of a brittlegill (Russula) mushroom both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 6, 2024
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Cross section of a bolete mushroom both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 6, 2024
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Underside of a brittlegill (Russula) mushroom both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 6, 2024
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Shoots of loblolly pine (Pinus taeda) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 6, 2024
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Blooming mountain mint (Pycnanthemum tenuifolium) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 6, 2024
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Elegant gayfeather (pinkscale, Liatris hesperelegans, former L. elegans) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 6, 2024
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Flowers of St. Andrew cross (Hypericum, Ascyrum hypericoides) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest. Texas, September 21, 2024
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Violet wood sorrel (Oxalis violacea) on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
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Soft fleshy amorphous polypore mushroom Abortiporus biennis(?) both in natural light and under 365 nm ultraviolet (UV-A) blacklight, found on rotting pine wood before the lake on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 6, 2025
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Lindheimer s beebalm (Monarda lindheimeri) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest. Montgomery County, Texas, May 25, 2026
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Handeless coneflower (Echinacea sanguinea) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest. Montgomery County, Texas, May 15, 2026
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Caps of polypore mushrooms Ganoderma sessile both in natural light and under 365 nm ultraviolet (UV-A) blacklight collected on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, September 13, 2024
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Violet wood sorrel (shamrock, Oxalis violacea?) in Big Thicket park on Sundew Trail. Texas, October 11, 2008
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Yellow wood sorrel (shamrock, Oxalis dillenii?) on Richards Loop Trail in Sam Houston National Forest. Texas, March 30, 2024
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Flowers of woolly-white (Hymenopappus artemisiaefolius) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest. Montgomery County, Texas, April 11, 2026
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Soft green-eyes (Berlandiera pumila) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, October 19, 2024
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Flowers of narrowleaf false dragonhead (Physostegia digitalis) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest. Montgomery County, Texas, June 27, 2026
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Blue waterleaf (Hydrolea ovata) both in natural light and under 365 nm ultraviolet (UV-A) blacklight taken from Road FS203 near Richards Loop Trail in Sam Houston National Forest. Montgomery County, Texas, July 25, 2026
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Flowers of narrow-leaf gayfeather (Liatris mucronata(?)) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest. Montgomery County, Texas, July 5, 2026
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St. Andrew cross flower (Hypericum, Ascyrum hypericoides) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest. Montgomery County, Texas, July 5, 2026
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Yellow wood sorrel (Oxalis) on Richards Loop Trail in Sam Houston National Forest. Montgomery County, Texas, March 22, 2026
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Violet wood sorrel (shamrock, Oxalis violacea?) in Mercer Arboretum and Botanical Gardens. Humble (Houston area), Texas, April 5, 2009
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Violet wood sorrel (Oxalis violacea, shamrock) on Hoots Hollow Trail in Brazos Bend State Park. Needville, Texas, February 15, 2020
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Violet wood sorrel (shamrock, Oxalis violacea?) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 21, 2008
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Pink flower of Violet wood sorrel (Oxalis violacea, shamrock) on Prairie Trail in Brazos Bend State Park. Needville, Texas, April 22, 2008
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Flowers of violet wood sorrel (Oxalis violacea, shamrock) in Little Thicket Nature Sanctuary. Cleveland, Texas, March 25, 2023
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Bloomin violet wood sorrel (Oxalis violacea, shamrock) in Little Thicket Nature Sanctuary. Cleveland, Texas, March 25, 2023
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Pink flowers of Violet wood sorrel (Oxalis violacea, shamrock) on Hoots Hollow Trail in Brazos Bend State Park. Needville, Texas, February 15, 2020
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Back lit flowers of violet wood sorrel (Oxalis violacea, shamrock) in Little Thicket Nature Sanctuary. Cleveland, Texas, March 25, 2023
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Pink flowers of violet wood sorrel (Oxalis violacea, shamrock) in Little Thicket Nature Sanctuary. Cleveland, Texas, March 25, 2023
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Yellow wood sorrel (Oxalis stricta) on Richards Loop Trail in Sam Houston National Forest. Texas, March 26, 2020
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Yellow wood sorrel (Oxalis stricta) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
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Gills of Turf Mottlegill mushrooms (Panaeolus fimicola)(?) both in natural light and under 365 nm ultraviolet (UV-A) blacklight on Forest Service Road 203 near Richards Loop Trail in Sam Houston National Forest. Texas, February 6, 2025
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Blooming southern wax myrtle (Myrica cerifera) both in natural light and under 365 nm ultraviolet (UV-A) blacklight on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, March 13, 2025
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Flowers of yellow wood sorrel (Oxalis stricta) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
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Basket grass (Oplismenus hirtellus) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, October 10, 2024
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Pineapple bolete mushroom (Boletellus ananas) both in natural light and under 365 nm ultraviolet (UV-A) blacklight collected on Stubblefield section of Lone Star hiking trail in Sam Houston National Forest. Texas, September 15, 2024
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Flowers of Virgin s Bower (Clematis virginiana) both in natural light and under 365 nm ultraviolet (UV-A) blacklight collected on Stubblefield section of Lone Star hiking trail in Sam Houston National Forest. Texas, September 15, 2024
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Inflorescence of Virgin s Bower (Clematis virginiana) both in natural light and under 365 nm ultraviolet (UV-A) blacklight collected on Stubblefield section of Lone Star hiking trail in Sam Houston National Forest. Texas, September 15, 2024
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Young leaves of bracken fern (Pteridium aquilinum) both in natural light and under 365 nm ultraviolet (UV-A) blacklight on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, March 13, 2025
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Yellow wood sorrel (shamrock, Oxalis dillenii?) in Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, May 26, 2012
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White flowers of aster Symphyotrichum drummondii both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, October 10, 2024
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Seeds of beefsteak plant (Perilla frutescens) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, October 10, 2024
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Fertile fronds of bead fern (Onoclea sensibilis) both in natural light and under 365 nm ultraviolet (UV-A) blacklight collected on Stubblefield section of Lone Star hiking trail in Sam Houston National Forest. Texas, September 15, 2024
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Violet Wood Sorrel (Oxalis violacea) in dew blooming at fall without leaves in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 20, 2013
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Dark brown-violet pinkgill mushrooms (Entoloma or Nolanea, Leptonia) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 7, 2024
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Flowers of sow palmetto both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, June 13, 2026
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Blooming yellow wood sorrel (shamrock, Oxalis dillenii?) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, March 29, 2009
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Blooming yellow wood sorrel (shamrock, Oxalis dillenii?) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, October 13, 2012
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Yellow flower of wood sorrel (shamrock, Oxalis dillenii?) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, October 13, 2012
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Gills of dark brown-violet pinkgill mushrooms (Entoloma or Nolanea, Leptonia) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 7, 2024
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Violet woodsorrel (Oxalis violacea) on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, March 1, 2019
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Leaves of violet woodsorrel (Oxalis violacea) on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, March 1, 2019
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Mountain mint (Pycnanthemum tenuifolium) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 6, 2024
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Underside of a leaf of violet woodsorrel (Oxalis violacea) on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, March 1, 2019
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Carpet of leaves of violet woodsorrel (Oxalis violacea) on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, March 1, 2019
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Pattern of leaves of violet woodsorrel (Oxalis violacea) on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, March 1, 2019
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Section of a false truffle (Rhizopogon) with a parasitic fungus Hypomyces chrysospermus in ultraviolet light from Richards Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 6, 2024
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Carolina jessamine (Gelsemium sempervirens) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Sam Houston National Forest near Richards. Texas, March 8, 2025
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Fallen fruits of trifoliate orange (Poncirus trifoliata) with citrus blue mold fungus Penicillium italicum both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, October 10, 2024
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Common blue violets (Viola sororia) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Sam Houston National Forest near Richards. Texas, March 8, 2025
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Matelea decipiens milkvine both in natural light and under 365 nm ultraviolet (UV-A) blacklight, from Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, April 12, 2026
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Pink wood sorrel (shamrock, Oxalis violacea?) in Mercer Arboretum and Botanical Gardens. Humble (Houston area), Texas, February 8, 2009
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Tiny purple flower of Violet wood sorrel (shamrock, Oxalis) on Deer Run Trail in Lick Creek Park. College Station, Texas, September 30, 2008
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Flowers of white-flowered milkweed (Asclepias variegata) both in natural light and under 365 nm ultraviolet (UV-A) blacklight, from Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, April 12, 2026
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Inflorescense of white-flowered milkweed (Asclepias variegata) both in natural light and under 365 nm ultraviolet (UV-A) blacklight, from Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, April 12, 2026
.../2026/3813/24.htm    similar
Flower heads of white-flowered milkweed (Asclepias variegata) both in natural light and under 365 nm ultraviolet (UV-A) blacklight, from Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, April 12, 2026
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Dissected dyeball mushroom (Pisolithus arhizus) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Lick Creek Greenway Trail. College Station, Texas, September 19, 2024
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Mountain mint (Pycnanthemum tenuifolium) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest. Texas, September 21, 2024
.../2024/3623/16.htm    similar
Orange milkweed (Asclepias tuberosa) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest. Texas, September 21, 2024
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Pencil flower (Stylosanthes biflora) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest. Texas, September 21, 2024
.../2024/3623/17.htm    similar
Wild petunia (Ruellia caroliniensis(?)) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest. Texas, September 21, 2024
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St. Andrew cross (Hypericum, Ascyrum hypericoides) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest. Texas, September 21, 2024
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Southern prairie aster (Eurybia hemispherica)(?) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest. Texas, September 21, 2024
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Section of fruit of pomegranate both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Kroger supermarket. College Station, Texas, September 12, 2024
.../2024/3619/07.htm    similar
Close-up of fruit of pomegranate both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Kroger supermarket. College Station, Texas, September 12, 2024
.../2024/3623/21.htm    similar
Sweet everlasting (Pseudognaphalium obtusifolium, cudweed, Gnaphalium) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest. Texas, September 21, 2024
.../2024/3613/24.htm    similar
Pore surface of turkeytail mushrooms (Trametes versicolor) in ultraviolet light from Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 2, 2024
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Mushrooms Gerronema strombodes when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 7, 2024
.../2024/3625/02.htm    similar
Flower of powderpuff (Mimosa strigillosa) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Bee Creek Park. College Station, Texas, September 23, 2024
.../2024/3624/28.htm    similar
Buffalo gourd both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Nails Creek Unit of Somerville Lake State Park. Texas, September 22, 2024
.../2024/3618/02.htm    similar
Purple gerardia (Agalinis purpurea) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Lick Creek Park. College Station, Texas, September 11, 2024
.../2024/3618/17.htm    similar
Flowers of frostweed (Verbesina virginica) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Lick Creek Park. College Station, Texas, September 11, 2024
.../2024/3628/01.htm    similar
Grass leaves in ultraviolet light on Richards Loop Trail in Sam Houston National Forest. Texas, October 5, 2024
.../2024/3613/21.htm    similar
Cross section of a young Amanita mushroom when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 2, 2024
.../2024/3613/20.htm    similar
Gills of tiny white Marasmius-like mushrooms when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 2, 2024
.../2024/3616/26.htm    similar
Pore surface of mushrooms Nigroporus vinosus when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 7, 2024
.../2024/3616/28.htm    similar
Top view of polypore mushrooms Nigroporus vinosus when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 7, 2024

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