 Violet wood sorrel (shamrock, Oxalis violacea?) in Big Thicket park on Sundew Trail. Texas, October 11, 2008
 Bloomin violet wood sorrel (Oxalis violacea, shamrock) in Little Thicket Nature Sanctuary. Cleveland, Texas, March 25, 2023
 Flowers of violet wood sorrel (Oxalis violacea, shamrock) in Little Thicket Nature Sanctuary. Cleveland, Texas, March 25, 2023
 Back lit flowers of violet wood sorrel (Oxalis violacea, shamrock) in Little Thicket Nature Sanctuary. Cleveland, Texas, March 25, 2023
 Pink flowers of violet wood sorrel (Oxalis violacea, shamrock) in Little Thicket Nature Sanctuary. Cleveland, Texas, March 25, 2023
 Violet wood sorrel (Oxalis violacea) on Richards Loop Trail in Sam Houston National Forest. Texas, March 3, 2024
 Violet wood sorrel (shamrock, Oxalis violacea) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
 Violet wood sorrel (shamrock, Oxalis violacea) on Richards Loop Trail in Sam Houston National Forest. Texas, March 26, 2020
 Violet wood sorrel (Oxalis violacea) on Lone Star Hiking Trail in Sam Houston National Forest west from Richards. Texas, April 9, 2019
 Flowers of Violet Wood Sorrel (Oxalis violacea) in Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, October 22, 2011
 Flower of Violet Wood Sorrel (Oxalis violacea) in Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, October 22, 2011
 Back lit Violet Wood Sorrel (Oxalis violacea) in Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, October 22, 2011
 Flower of violet wood sorrel (Oxalis violacea) on Lone Star Hiking Trail in Sam Houston National Forest west from Richards. Texas, April 9, 2019
 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
 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
 Leaves of Albizia on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Hypericum fasciculatum on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Violet wood sorrel (Oxalis violacea, shamrock) on Hoots Hollow Trail in Brazos Bend State Park. Needville, Texas, February 15, 2020
 Back lit leaves of Albizia on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Ruellia flower, near a parking lot of Sundew Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Texture of a pine cone on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Pink flower of Violet wood sorrel (Oxalis violacea, shamrock) on Prairie Trail in Brazos Bend State Park. Needville, Texas, April 22, 2008
 Western ironweed (Vernonia baldwini) on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Delta arrowhead (Sagittaria platyphylla) on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Pencil flower (Stylosanthes biflora) on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Maryland milkwort (Polygala mariana) on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Purple Pleatleaf (Alophia drummondii) on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Roughstem rosinweed (Silphium radula) on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Shrubby water-primrose (Ludwigia) on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Indian Plantain (Cacalia ovata) on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Fringed meadowbeauty (Rhexia petiolata) on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Pink flowers of Violet wood sorrel (Oxalis violacea, shamrock) on Hoots Hollow Trail in Brazos Bend State Park. Needville, Texas, February 15, 2020
 St. Peter s-wort (Hypericum crux-andreae) on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Flower of Purple Pleatleaf (Alophia drummondii) on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Flower of Roughstem rosinweed (Silphium radula) on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Narrowleaf mountain mint (Pycnanthemum tenuifolium) on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Violet wood sorrel (shamrock, Oxalis violacea?) in Mercer Arboretum and Botanical Gardens. Humble (Houston area), Texas, April 5, 2009
 Galls caused by fungus Exobasidium symploci-japonicae on sweetleaf (Symplocos tinctoria) (?) on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Violet wood sorrel (shamrock, Oxalis violacea?) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 21, 2008
 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
 Some green moss at the base of a tree on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 12, 2022
 Some warty white Amanita mushrooms on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 12, 2022
 Marsh mallow (Hibiscus militaris) on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 12, 2022
 Green berries on a swamp tree on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 25, 2022
 Rose-gentian (Sabatia gentianoides) on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 12, 2022
 Grass pink (Calopogon tuberosus) on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 12, 2022
 Barbara s buttons (Marshallia tenuifolia) on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, November 14, 2020
 Flowers of moss verbena (Glandularia pulchella) on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 12, 2022
 Wild potato vine (Ipomoea pandurata) on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 12, 2022
 Narrowleaf, or slender mountainmint (Pycnanthemum tenuifolium) on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 12, 2022
 Young bolete mushrooms Leccinellum albellum on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 23, 2018
 Pinkgill mushrooms Entoloma strictius near a boardwalk on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 23, 2018
 Pinkgill mushrooms Entoloma strictius in wet area on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 23, 2018
 Underside of milkcap mushroom Lactarius salmoneus on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 12, 2022
 Gills of milkcap mushroom Lactarius salmoneus on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 12, 2022
 Destroying angel mushroom Amanita bisporigera on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 23, 2018
 Pink wood sorrel (shamrock, Oxalis violacea?) in Mercer Arboretum and Botanical Gardens. Humble (Houston area), Texas, February 8, 2009
 Flowers of swamp titi bush (Cyrilla racemiflora) on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 12, 2022
 Cross section of some warty white Amanita mushrooms on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 12, 2022
 Moss verbena (Glandularia pulchella) on a path with gravel on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 12, 2022
 Polypore mushrooms Microporellus obovatus on a fallen stick on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 12, 2022
 Lyell s ribbonwort (Pallavicinia lyellii) with some soil pellets on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 12, 2022
 Cross section of milkcap mushroom Lactarius salmoneus on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 12, 2022
 Close-up of Lyell s ribbonwort (Pallavicinia lyellii) in marsh on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 12, 2022
 Dissected destroying angel mushroom Amanita bisporigera on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 23, 2018
 Large group of bolete mushrooms Leccinellum albellum on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 23, 2018
 Gelatinous stalked-puffball mushrooms (Calostoma cinnabarinum) on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 23, 2018
 Mountain mint (Pycnanthemum) on Kirby Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Dissected stalked puffball-in-aspic mushrooms (Calostoma cinnabarinum) on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 23, 2018
 Lyell s ribbonwort (veilwort, Pallavicinia lyellii) in mash near a boardwalk on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 12, 2022
 Side view of young bolete mushrooms Leccinellum albellum on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 23, 2018
 White flowers of narrowleaf, or slender mountainmint (Pycnanthemum tenuifolium) on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 12, 2022
 Some tiny white flower on Pitcher Plant Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Elephant foot (Elephantopus carolinianus) on Kirby Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Tachinid(?) fly on Mountain mint (Pycnanthemum) on Kirby Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Leaves of alder Alnus serrulata(?) on Kirby Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Stinking brittlegill mushrooms (Russula foetens) on a lawn near a parking place on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 12, 2022
 Earth star mushroom (Geastrum saccatum) on Kirby Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Low pinebarren milkwort (Polygala ramosa) on Pitcher Plant Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Longleaf milkweed (Asclepias longifolia) on Pitcher Plant Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Drumheads milkwort (Polygala cruciata) on Pitcher Plant Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Ten-angle Pipewort (Eriocaulon decangulare) on Pitcher Plant Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Milkcap mushroom Lactarius salmoneus under pines and bushes in dried marshy area on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 12, 2022
 Stalked puffball-in-aspic mushrooms (Calostoma cinnabarinum) under a boardwalk on a slope of a creek on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 23, 2018
 White flowers of yellow bractspike (Yeatesia viridiflora) on Kirby Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Close up of Drumheads milkwort (Polygala cruciata) on Pitcher Plant Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Flowers of Longleaf milkweed (Asclepias longifolia) on Pitcher Plant Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Coastal false asphodel (Tofieldia racemosa) on Pitcher Plant Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Tiny purple flower of Violet wood sorrel (shamrock, Oxalis) on Deer Run Trail in Lick Creek Park. College Station, Texas, September 30, 2008
 Gelatinous stalked-puffball (gasteroid fungus Calostoma cinnabarinum) with translucent gelly coating on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 23, 2018
 Cluster of flowers of Longleaf milkweed (Asclepias longifolia) on Pitcher Plant Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Stubby-stalked Cladonia lichen (Cladonia caespiticia) at the base of a tree on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 12, 2022
 Tiny white flowers of Lax hornpod (miterwort, Mitreola petiolata) (Loganiaceae) on Kirby Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Male flower of Southern waxy sedge (Carex glaucescens) on Pitcher Plant Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Female flowers of Southern waxy sedge (Carex glaucescens) on Pitcher Plant Trail in Big Thicket National Preserve. Kountze, Texas, August 2, 2014
 Blooming yellow wood sorrel (shamrock, Oxalis dillenii?) with soldier flies (Stratiomyidae) in Big Thicket park on Sandhill Loop Trail. Texas, March 23, 2008
 Stubby-stalked Cladonia lichen (Cladonia caespiticia) with white moss at the base of a tree on Sundew Trail in Big Thicket National Preserve. Kountze, Texas, June 12, 2022
 Blooming slender trillium (Trillium gracile) and yellow wood sorrel (Oxalis) on Fringe Tree Trail in Little Thicket Nature Sanctuary. Cleveland, Texas, March 23, 2024
 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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