![](../../pictures/archives/compress/2022/3121/jpeg/12t.jpg) Lyreleaf sage (Salvia lyrata) on Forest Service Road 203 near Richards Loop Trail in Sam Houston National Forest. Texas, March 23, 2022
![](../../pictures/archives/compress/2024/3503/jpeg/03t.jpg) Blooming lyreleaf sage (Salvia lyrata) on Road FS 203 near Richards Loop Trail in Sam Houston National Forest. Texas, March 30, 2024
![](../../pictures/archives/compress/2010/860/jpeg/24t.jpg) Blue thistle on a trail in Sam Houston National Forest, near Road 149, near Richards. Texas, May 15, 2010
![](../../pictures/archives/compress/2024/3503/jpeg/23t.jpg) Young leaf of bracken fern (Pteridium aquilinum) on Road FS 203 near on Richards Loop Trail in Sam Houston National Forest. Texas, March 30, 2024
![](../../pictures/archives/compress/2020/2674/jpeg/24t.jpg) Lyreleaf sage (Salvia lyrata) on Richards Loop Trail in Sam Houston National Forest. Texas, March 26, 2020
![](../../pictures/archives/compress/2024/3633/jpeg/11t.jpg) Pitcher sage (Salvia azurea) on Richards Loop Trail in Sam Houston National Forest. Texas, October 20, 2024
![](../../pictures/archives/compress/2020/2666/jpeg/16t.jpg) Lyreleaf sage (Salvia lyrata) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
![](../../pictures/archives/compress/2024/3502/jpeg/10t.jpg) Lyreleaf sage (Salvia lyrata) on Richards Loop Trail in Sam Houston National Forest. Texas, March 30, 2024
![](../../pictures/archives/compress/2010/860/jpeg/18t.jpg) Self-Heal (Carpenter-weed, Prunella vulgaris) on a trail in Sam Houston National Forest, near Road 149, near Richards. Texas, May 15, 2010
![](../../pictures/archives/compress/2010/860/jpeg/19t.jpg) Violet ruella (Ruellia caroliniensis) flower on a trail in Sam Houston National Forest, near Road 149, near Richards. Texas, May 15, 2010
![](../../pictures/archives/compress/2020/2666/jpeg/18t.jpg) Flowers of lyreleaf sage (Salvia lyrata) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
![](../../pictures/archives/compress/2010/860/jpeg/26t.jpg) Two flowers of black-eyed susan (Rudbeckia hirta) on a trail in Sam Houston National Forest, near Road 149, near Richards. Texas, May 15, 2010
![](../../pictures/archives/compress/2010/860/jpeg/25t.jpg) Back lit violet ruella (Ruellia caroliniensis) flowers on a trail in Sam Houston National Forest, near Road 149, near Richards. Texas, May 15, 2010
![](../../pictures/archives/compress/2010/860/jpeg/21t.jpg) Flower of black-eyed susan (Rudbeckia hirta) on a trail in Sam Houston National Forest, near Road 149, near Richards. Texas, May 15, 2010
![](../../pictures/archives/compress/2019/2589/jpeg/14t.jpg) Azure blue sage (Salvia azurea) in a pine forest on Sand Branch Loop Trail in Sam Houston National Forest near Richards. Texas, November 3, 2019
![](../../pictures/archives/compress/2010/860/jpeg/20t.jpg) Violet ruella (Ruellia caroliniensis) flower with water drops on a trail in Sam Houston National Forest, near Road 149, near Richards. Texas, May 15, 2010
![](../../pictures/archives/compress/2010/860/jpeg/27t.jpg) Yellow flower of black-eyed susan (Rudbeckia hirta) on a trail in Sam Houston National Forest, near Road 149, near Richards. Texas, May 15, 2010
![](../../pictures/archives/compress/2010/860/jpeg/22t.jpg) Yellow flowers of black-eyed susan (Rudbeckia hirta) on a trail in Sam Houston National Forest, near Road 149, near Richards. Texas, May 15, 2010
![](../../pictures/archives/compress/2019/2589/jpeg/15t.jpg) Close up of azure blue sage (Salvia azurea) in a pine forest on Sand Branch Loop Trail in Sam Houston National Forest near Richards. Texas, November 3, 2019
![](../../pictures/archives/compress/2024/3516/jpeg/20t.jpg) Flower receptacles of Jerusalem sage (Phlomis fruticosa) in Antique Rose Emporium. Independence, Texas, April 20, 2024
![](../../pictures/archives/compress/2021/2864/jpeg/06t.jpg) Basal rosette of leaves of lyreleaf sage (Salvia lyrata)(?) on Richards Loop Trail in Sam Houston National Forest. Texas, February 6, 2021
![](../../pictures/archives/compress/2019/2589/jpeg/13t.jpg) Flower of azure blue sage (Salvia azurea) on Sand Branch Loop Trail in Sam Houston National Forest near Richards. Texas, November 3, 2019
![](../../pictures/archives/compress/2024/3475/jpeg/13t.jpg) Basal rosette of leaves of lyreleaf sage (Salvia lyrata) on FS203 near Richards Loop Trail in Sam Houston National Forest. Texas, February 21, 2024
![](../../pictures/archives/compress/2020/2704/jpeg/18t.jpg) Oak leaf anthracnose (leaf spot fungus, Dicarpella dryina, Tubakia dryina) on Richards Loop Trail in Sam Houston National Forest. Texas, May 10, 2020
![](../../pictures/archives/compress/2020/2756/jpeg/19t.jpg) Black blotches on the leaf of persimmon (Diospyros virginiana) caused by Cercospora leaf spot fungus Pseudocercospora diospyricola on Richards Loop Trail in Sam Houston National Forest. Texas, August 21, 2020
![](../../pictures/archives/compress/2022/3211/jpeg/10t.jpg) Black blotches on the leaf of persimmon (Diospyros virginiana) caused by Cercospora leaf spot fungus Pseudocercospora diospyricola on Richards Loop Trail in Sam Houston National Forest. Texas, August 18, 2022
![](../../pictures/archives/compress/2020/2704/jpeg/19t.jpg) Back lit oak leaf anthracnose (leaf spot fungus, Dicarpella dryina, Tubakia dryina) on Richards Loop Trail in Sam Houston National Forest. Texas, May 10, 2020
![](../../pictures/archives/compress/2020/2704/jpeg/20t.jpg) Close-up of oak leaf anthracnose (leaf spot fungus, Dicarpella dryina, Tubakia dryina) on Richards Loop Trail in Sam Houston National Forest. Texas, May 10, 2020
![](../../pictures/archives/compress/2020/2756/jpeg/18t.jpg) Necrotic spots that develop into angular lesions on underside of a leaf of persimmon (Diospyros virginiana) caused by persimmon Cercospora leaf spot fungus Pseudocercospora diospyricola on Richards Loop Trail in Sam Houston National Forest. Texas, August 21, 2020
![](../../pictures/archives/compress/2022/3113/jpeg/15t.jpg) Rosette of leaves of lyreleaf sage (Salvia lyrata) on Forest Service Road 231 near North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, March 5, 2022
![](../../pictures/archives/compress/2020/2666/jpeg/20t.jpg) Venation of a sassafras leaf on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
![](../../pictures/archives/compress/2020/2830/jpeg/17t.jpg) Close-up of a leaf of sassafras on Richards Loop Trail in Sam Houston National Forest. Texas, December 15, 2020
![](../../pictures/archives/compress/2021/2994/jpeg/03t.jpg) Leaf of mustang grape on Richards Loop Trail in Sam Houston National Forest. Texas, July 29, 2021
![](../../pictures/archives/compress/2020/2830/jpeg/15t.jpg) Orange leaf of sassafras on Richards Loop Trail in Sam Houston National Forest. Texas, December 15, 2020
![](../../pictures/archives/compress/2021/3019/jpeg/19t.jpg) Caterpillar munching leaf of an oak on Richards Loop Trail in Sam Houston National Forest. Texas, September 8, 2021
![](../../pictures/archives/compress/2020/2830/jpeg/18t.jpg) Texture of a leaf of sassafras on Richards Loop Trail in Sam Houston National Forest. Texas, December 15, 2020
![](../../pictures/archives/compress/2012/1062/jpeg/23t.jpg) Skeletonized leaf in Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, May 26, 2012
![](../../pictures/archives/compress/2020/2830/jpeg/16t.jpg) Speckled leaf of sassafras on Richards Loop Trail in Sam Houston National Forest. Texas, December 15, 2020
![](../../pictures/archives/compress/2024/3631/jpeg/17t.jpg) Pitcher sage (Salvia azurea) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Sam Houston National Forest. Richards, Texas, October 12, 2024
![](../../pictures/archives/compress/2022/3184/jpeg/21t.jpg) Road FS203A at crossing with Forest Service Road 203 near Richards Loop Trail in Sam Houston National Forest. Texas, June 29, 2022
![](../../pictures/archives/compress/2021/2994/jpeg/04t.jpg) Young leaf of mustang grape on Richards Loop Trail in Sam Houston National Forest. Texas, July 29, 2021
![](../../pictures/archives/compress/2022/3128/jpeg/07t.jpg) Reddish leaf of mustang grape on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
![](../../pictures/archives/compress/2022/3128/jpeg/13t.jpg) Young leaf of mustang grape on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
![](../../pictures/archives/compress/2012/1100/jpeg/04t.jpg) Red leaf of sassafras at Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, August 19, 2012
![](../../pictures/archives/compress/2020/2810/jpeg/03t.jpg) Woolly growth (gall) on a dry oak leaf on Richards Loop Trail in Sam Houston National Forest. Texas, November 5, 2020
![](../../pictures/archives/compress/2024/3630/jpeg/27t.jpg) Receptacles of beefsteak plant (Perilla frutescens) in ultraviolet light from Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, October 10, 2024
![](../../pictures/archives/compress/2023/3410/jpeg/13t.jpg) Narrow-leaf gayfeather (Liatris mucronata(?)) on Richards Loop Trail in Sam Houston National Forest. Texas, July 23, 2023
![](../../pictures/archives/compress/2024/3502/jpeg/15t.jpg) Back lit Phylloxera galls on a hickory leaf on Richards Loop Trail in Sam Houston National Forest. Texas, March 30, 2024
![](../../pictures/archives/compress/2021/3008/jpeg/12t.jpg) Narrow-leaf gayfeather (Liatris mucronata(?)) on Richards Loop Trail in Sam Houston National Forest. Texas, August 15, 2021
![](../../pictures/archives/compress/2024/3637/jpeg/06t.jpg) Leaf of an aquatic plant in ultraviolet light from Richards Loop Trail in Sam Houston National Forest. Texas, October 27, 2024
![](../../pictures/archives/compress/2020/2738/jpeg/07t.jpg) Narrow-leaf gayfeather (Liatris mucronata(?)) on Richards Loop Trail in Sam Houston National Forest. Texas, July 12, 2020
![](../../pictures/archives/compress/2021/2994/jpeg/16t.jpg) Narrow-leaf gayfeather (Liatris mucronata(?)) on Richards Loop Trail in Sam Houston National Forest. Texas, July 29, 2021
![](../../pictures/archives/compress/2021/3001/jpeg/19t.jpg) Narrow-leaf gayfeather (Liatris mucronata(?)) on Richards Loop Trail in Sam Houston National Forest. Texas, August 7, 2021
![](../../pictures/archives/compress/2021/2994/jpeg/27t.jpg) Green lynx spider on a leaf of greenbrier on Richards Loop Trail in Sam Houston National Forest. Texas, July 29, 2021
![](../../pictures/archives/compress/2024/3630/jpeg/29t.jpg) Close-up of receptacles of beefsteak plant (Perilla frutescens) in ultraviolet light from Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, October 10, 2024
![](../../pictures/archives/compress/2023/3367/jpeg/15t.jpg) Uncurling leaf of bracken fern (Pteridium aquilinum) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023
![](../../pictures/archives/compress/2021/2994/jpeg/17t.jpg) Blooming narrow-leaf gayfeather (Liatris mucronata(?)) on Richards Loop Trail in Sam Houston National Forest. Texas, July 29, 2021
![](../../pictures/archives/compress/2020/2738/jpeg/15t.jpg) Flowers of narrow-leaf gayfeather (Liatris mucronata(?)) on Richards Loop Trail in Sam Houston National Forest. Texas, July 12, 2020
![](../../pictures/archives/compress/2023/3410/jpeg/14t.jpg) Flowers of narrow-leaf gayfeather (Liatris mucronata(?)) on Richards Loop Trail in Sam Houston National Forest. Texas, July 23, 2023
![](../../pictures/archives/compress/2021/3001/jpeg/20t.jpg) Flowers of narrow-leaf gayfeather (Liatris mucronata(?)) on Richards Loop Trail in Sam Houston National Forest. Texas, August 7, 2021
![](../../pictures/archives/compress/2022/3172/jpeg/35t.jpg) Fresh leaf of flameleaf sumac (Rhus lanceolata) on Richards Loop Trail in Sam Houston National Forest. Texas, June 9, 2022
![](../../pictures/archives/compress/2021/2994/jpeg/18t.jpg) Flowers of narrow-leaf gayfeather (Liatris mucronata(?)) on Richards Loop Trail in Sam Houston National Forest. Texas, July 29, 2021
![](../../pictures/archives/compress/2022/3172/jpeg/19t.jpg) Purple pleat-leaf (Pinewood lily, Alophia drummondii) on Richards Loop Trail in Sam Houston National Forest. Texas, June 9, 2022
![](../../pictures/archives/compress/2021/2994/jpeg/19t.jpg) Close-up of flowers of narrow-leaf gayfeather (Liatris mucronata(?)) on Richards Loop Trail in Sam Houston National Forest. Texas, July 29, 2021
![](../../pictures/archives/compress/2022/3194/jpeg/02t.jpg) Woolly growth (galls) on underside of a hickory(?) leaf on Richards Loop Trail in Sam Houston National Forest near Montgomery. Texas, July 19, 2022
![](../../pictures/archives/compress/2020/2697/jpeg/12t.jpg) Hickory leaf with dense cover of Phylloxera galls on Sand Branch Loop Trail in Sam Houston National Forest near Richards. Texas, May 2, 2020
![](../../pictures/archives/compress/2022/3184/jpeg/08t.jpg) Green nymph of grasshopper on a dried leaf of bracken fern on Richards Loop Trail in Sam Houston National Forest. Texas, June 29, 2022
![](../../pictures/archives/compress/2023/3367/jpeg/20t.jpg) Pattern of a young leaf of bracken fern (Pteridium aquilinum) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023
![](../../pictures/archives/compress/2020/2666/jpeg/08t.jpg) Young red lobed leaf of mustang grape (Vitis mustangensis) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
![](../../pictures/archives/compress/2020/2819/jpeg/08t.jpg) Large catalpa-like leaf with pronounced veins on Sand Branch Loop Trail in Sam Houston National Forest near Richards. Texas, November 20, 2020
![](../../pictures/archives/compress/2020/2667/jpeg/07t.jpg) Young lobed leaf of mustang grape (Vitis mustangensis) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
![](../../pictures/archives/compress/2008/664/jpeg/21t.jpg) Shield-backed bug (Scutelleridae) on a leaf of yaupon holly in Sam Houston National Forest, on Little Lake Creek Loop Trail. Richards, Texas, August 10, 2008
![](../../pictures/archives/compress/2021/3091/jpeg/22t.jpg) Milky false truffle mushroom Zelleromyces cinnabarinus placed on an oak leaf with a gall on Richards Loop Trail in Sam Houston National Forest. Texas, December 28, 2021
![](../../pictures/archives/compress/2020/2819/jpeg/05t.jpg) Yellow leaf of passion flower (Passiflora lutea) on Sand Branch Loop Trail in Sam Houston National Forest near Richards. Texas, November 20, 2020
![](../../pictures/archives/compress/2022/3116/jpeg/03t.jpg) Close-up of a greenbrier leaf with rust fungus Puccinia smilacis, collected on Richards Loop Trail in Sam Houston National Forest. Texas, March 9, 2022
![](../../pictures/archives/compress/2008/653/jpeg/16t.jpg) Shrubby (narrow-leaf) water-primrose (Ludwigia octovalvis) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 22, 2008
![](../../pictures/archives/compress/2022/3189/jpeg/14t.jpg) Fungus Botryosphaeria dothidea (in Congo Red solution) collected from leaf tar spots on goldenrod on Richards Loop Trail in Sam Houston National Forest. Texas, July 10, 2022
![](../../pictures/archives/compress/2008/659/jpeg/20t.jpg) Young flowers of narrow-leaf gayfeather (Liatris mucronata) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 20, 2008
![](../../pictures/archives/compress/2008/659/jpeg/19t.jpg) Opening flowers of narrow-leaf gayfeather (Liatris mucronata) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 20, 2008
![](../../pictures/archives/compress/2022/3099/jpeg/08t.jpg) Leaf of climbing fern (Lygodium japonicum) on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, January 22, 2022
![](../../pictures/archives/compress/2019/2456/jpeg/03t.jpg) Young leaf of May apple (Podophyllum peltatum) on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, March 1, 2019
![](../../pictures/archives/compress/2023/3396/jpeg/20t.jpg) Leaves of plain-leaf pussytoes (Antennaria parlinii) on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, April 28, 2023
![](../../pictures/archives/compress/2022/3189/jpeg/13t.jpg) Gall fungus Botryosphaeria dothidea (in Congo Red solution) collected from leaf tar spots on goldenrod on Richards Loop Trail in Sam Houston National Forest. Texas, July 10, 2022
![](../../pictures/archives/compress/2008/659/jpeg/17t.jpg) Tiny white flowers of rustweed (juniper leaf, Polypremum procumbens) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 20, 2008
![](../../pictures/archives/compress/2012/1062/jpeg/20t.jpg) Purple pleat-leaf (Pinewood lily, Alophia drummondii, Eustylis purpurea) in Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, May 26, 2012
![](../../pictures/archives/compress/2022/3099/jpeg/10t.jpg) Leaf pattern of climbing fern (Lygodium japonicum) on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, January 22, 2022
![](../../pictures/archives/compress/2022/3099/jpeg/09t.jpg) Outgrowth on a leaf of climbing fern (Lygodium japonicum) on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, January 22, 2022
![](../../pictures/archives/compress/2019/2457/jpeg/11t.jpg) 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
![](../../pictures/archives/compress/2020/2810/jpeg/17t.jpg) Texas leaf cutting ant (Atta texana) on a sand mound on Richards Loop Trail in Sam Houston National Forest. Texas, November 5, 2020
![](../../pictures/archives/compress/2014/1455/jpeg/21t.jpg) Purple pleat-leaf (Pinewood lily, Alophia drummondii, Eustylis purpurea) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 13, 2014
![](../../pictures/archives/compress/2024/3607/jpeg/21t.jpg) Narrow-leaf gayfeather (Liatris mucronata(?)) 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, August 24, 2024
![](../../pictures/archives/compress/2022/3099/jpeg/11t.jpg) Leaf of climbing fern (Lygodium japonicum) suffered from freeze(?) on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, January 22, 2022
![](../../pictures/archives/compress/2014/1456/jpeg/04t.jpg) Purple pleat-leaf (Pinewood lily, Alophia drummondii, Eustylis purpurea) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 13, 2014
![](../../pictures/archives/compress/2020/2810/jpeg/18t.jpg) Texas leaf cutting ants (Atta texana) excavating sand on Richards Loop Trail in Sam Houston National Forest. Texas, November 5, 2020
![](../../pictures/archives/compress/2010/893/jpeg/09t.jpg) Head of grasshopper in Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, October 2, 2010
![](../../pictures/archives/compress/2020/2810/jpeg/19t.jpg) Texas leaf cutting ants (Atta texana) carrying sand bits on Richards Loop Trail in Sam Houston National Forest. Texas, November 5, 2020
![](../../pictures/archives/compress/2014/1456/jpeg/03t.jpg) Flower of purple pleat-leaf (Pinewood lily, Alophia drummondii, Eustylis purpurea) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 13, 2014
![](../../pictures/archives/compress/2014/1455/jpeg/22t.jpg) Flower of Purple pleat-leaf (Pinewood lily, Alophia drummondii, Eustylis purpurea) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 13, 2014
![](../../pictures/archives/compress/2020/2756/jpeg/21t.jpg) Leaf of persimmon (Diospyros virginiana) prematurely turned yellow with black spots of fungus Pseudocercospora diospyricola on Richards Loop Trail in Sam Houston National Forest. Texas, August 21, 2020
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