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3410-16. Pycnia of Juniper-hawthorn rust fungus (Gymnosporangium globosum) on leaves of littlehip hawthorn (Crataegus spathulata) on Richards Loop Trail in Sam Houston National Forest. Texas, July 23, 2023Similar picturesLarge thumbnails | Use small thumbnails | View as slideshow |
 Leaves of littlehip hawthorn (Crataegus spathulata) with pycnia of Juniper-hawthorn rust fungus (Gymnosporangium globosum) on Richards Loop Trail in Sam Houston National Forest. Texas, July 23, 2023  Pycnia of Juniper-hawthorn rust fungus (Gymnosporangium globosum) under a microscope in KOH, from upper surface of leaves of littlehip hawthorn (Crataegus spathulata), collected on Richards Loop Trail in Sam Houston National Forest. Texas, July 23, 2023  Juniper-hawthorn rust fungus (Gymnosporangium globosum) on littlehip hawthorn (Crataegus spathulata) with pycnia near a pond on Richards Loop Trail in Sam Houston National Forest. Texas, July 23, 2023  Tissues infected by Juniper-hawthorn rust fungus (Gymnosporangium globosum) under a microscope in KOH, from upper surface of leaves of littlehip hawthorn (Crataegus spathulata), collected on Richards Loop Trail in Sam Houston National Forest. Texas, July 23, 2023  Cedar-hawthorn rust fungus (Gymnosporangium globosum) on littlehip hawthorn (Crataegus spathulata) on Richards Loop Trail in Sam Houston National Forest. Texas, April 13, 2024  Cedar-hawthorn rust fungus (Gymnosporangium globosum)(?) on littlehip hawthorn (Crataegus spathulata) in Sam Houston National Forest, on Little Lake Creek Loop Trail. Richards, Texas, May 18, 2014  Leaves of littlehip hawthorn (Crataegus spathulata) with cedar-hawthorn rust fungus (Gymnosporangium globosum) in Lick Creek Park. College Station, Texas, May 6, 2024  Leaves of littlehip hawthorn (Crataegus spathulata) with cedar-hawthorn rust fungus (Gymnosporangium globosum) in Lick Creek Park. College Station, Texas, April 18, 2018  Littlehip hawthorn (Crataegus spathulata) with cedar-hawthorn rust fungus (Gymnosporangium globosum) in Lick Creek Park. College Station, Texas, May 6, 2024  Cedar-hawthorn rust fungus (Gymnosporangium globosum) on littlehip hawthorn (Crataegus spathulata) in Lick Creek Park. College Station, Texas, April 18, 2018  Cedar-hawthorn rust fungus (Gymnosporangium globosum) on leaves of Engelmann s hawthorn (Crataegus engelmannii) in Lick Creek Park. College Station, Texas, May 7, 2018  Conidiospores and tissues of cedar-hawthorn rust fungus (Gymnosporangium globosum) collected in Lick Creek Park. College Station, Texas, May 6, 2024  Spores and tissues of cedar-hawthorn rust fungus (Gymnosporangium globosum) collected in Lick Creek Park. College Station, Texas, May 6, 2024  Young leaves of parsley hawthorn (Crataegus marshallii) on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, March 28, 2021  Young leaves and flowers of hawthorn on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023  Reddish young leaves and flowers of hawthorn on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023  Leaves of parsley hawthorn (Crataegus marshallii) in Big Creek Scenic Area of Sam Houston National Forest. Shepherd, Texas, April 20, 2019  Shoot of parsley hawthorn (Crataegus marshallii) on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, March 28, 2021  Parsley hawthorn (Crataegus marshallii) on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, March 4, 2023  Shoot of parsley hawthorn (Crataegus marshallii) on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, March 4, 2023  Flowers of hawthorn on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023  Early blooming hawthorn on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023  Young leaves of hawthorn at Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, March 8, 2019  Shoot of parsley hawthorn (Crataegus marshallii) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, March 20, 2022  Parsley hawthorn (Crataegus marshallii) on Lone Star Hiking Trail east from Trailhead 3 in Sam Houston National Forest near Montgomery. Texas, October 9, 2022  Blooming hawthorn on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020  Blooming hawthorn on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022  Blooming hawthorn on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022  Orange spots on leaves of mountain ash caused by mountain ash-juniper rust fungus (Gymnosporangium cornutum) in Petiayarvi, north from Saint Petersburg. Russia, July 17, 2015  Blooming Engelmann s hawthorn (Crataegus engelmannii) in Lick Creek Park. College Station, Texas, March 20, 2023  White flowers of Engelmann s hawthorn (Crataegus engelmannii) in Lick Creek Park. College Station, Texas, March 20, 2023  Leaves of hairy bush clover (Lespedeza hirta) with rust fungus Uromyces lespedezae or may be Cercospora on Richards Loop Trail in Sam Houston National Forest. Texas, July 10, 2022  Black balls of rust fungus Uromyces lespedezae or may be Cercospora from underside of leaves of hairy bush clover collected on Richards Loop Trail in Sam Houston National Forest. Texas, July 10, 2022  Black balls of rust fungus Uromyces lespedezae or may be Cercospora from underside of leaves of hairy bush clover under a microscope at low magnifications collected on Richards Loop Trail in Sam Houston National Forest. Texas, July 10, 2022  Blooming hawthorn on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, March 28, 2021  White flowers of hawthorn on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, March 28, 2021  Greenbrier leaves with rust fungus Puccinia smilacis, collected on Richards Loop Trail in Sam Houston National Forest. Texas, March 9, 2022  Rust fungus Puccinia smilacis on greenbrier leaves under a microscope, collected on Richards Loop Trail in Sam Houston National Forest. Texas, March 9, 2022  Underside of greenbrier leaves with rust fungus Puccinia smilacis, collected on Richards Loop Trail in Sam Houston National Forest. Texas, March 9, 2022  Urediniospores of rust fungus Puccinia smilacis on greenbrier leaves under a microscope, collected on Richards Loop Trail in Sam Houston National Forest. Texas, March 9, 2022  Urediniospores of rust fungus Puccinia smilacis on greenbrier leaves under a microscope, collected on Richards Loop Trail in Sam Houston National Forest. Texas, March 9, 2022  Flowers of hawthorn on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 11, 2021  Blooming hawthorn on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 11, 2021  Exfoliating bark on a hawthorn tree on floodplain on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, July 30, 2022  Orange-yellow rust fungus Puccinia poarum (Puccinia liatridis) on basal leaves of gayfeather (Liatris) on Richards Loop Trail in Sam Houston National Forest. Texas, March 26, 2020  Basal leaves of gayfeather (Liatris) with orange-yellow rust fungus Puccinia poarum (Puccinia liatridis) on Richards Loop Trail in Sam Houston National Forest. Texas, March 26, 2020  Hairy bush clover (Lespedeza hirta) with rust fungus Uromyces lespedezae or may be Cercospora on Richards Loop Trail in Sam Houston National Forest. Texas, July 10, 2022  Underside of basal leaves of gayfeather (Liatris) with orange-yellow rust fungus Puccinia poarum (Puccinia liatridis) on Richards Loop Trail in Sam Houston National Forest. Texas, March 26, 2020  Close-up of orange-yellow rust fungus Puccinia poarum (Puccinia liatridis) on basal leaves of gayfeather (Liatris) on Richards Loop Trail in Sam Houston National Forest. Texas, March 26, 2020  Hawthorn Crataegus laevigata Rosea Flore Pleno in Peter the Great Botanical Garden of Komarov Botanical Institute. Saint Petersburg, Russia, June 3, 2019  Shoots of hairy bush clover (Lespedeza hirta) with rust fungus Uromyces lespedezae or may be Cercospora on Richards Loop Trail in Sam Houston National Forest. Texas, July 10, 2022  Yellow leaves of jumpseed (knotweed, Persicaria virginiana) with some rust fungus on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, July 3, 2022  Leaves of jumpseed (knotweed, Persicaria virginiana) on black background with some rust fungus on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, July 3, 2022  Brown bracket polypore mushroom Phellinopsis conchata(?) (Hymenochaetaceae) on a thin hawthorn(?) on South Wilderness Loop Trail at Little Lake Creek Wilderness in Sam Houston National Forest near Montgomery. Texas, January 1, 2024  Close-up of brown bracket polypore mushroom Phellinopsis conchata(?) (Hymenochaetaceae) on a thin hawthorn(?) on South Wilderness Loop Trail at Little Lake Creek Wilderness in Sam Houston National Forest near Montgomery. Texas, January 1, 2024  Caps of brown bracket polypore mushrooms Phellinopsis conchata(?) (Hymenochaetaceae) on a thin hawthorn(?) on South Wilderness Loop Trail at Little Lake Creek Wilderness in Sam Houston National Forest near Montgomery. Texas, January 1, 2024  Pores of brown bracket polypore mushroom Phellinopsis conchata(?) (Hymenochaetaceae) on a thin hawthorn(?) on South Wilderness Loop Trail at Little Lake Creek Wilderness in Sam Houston National Forest near Montgomery. Texas, January 1, 2024  Aecia of mayapple rust fungus Allodus podophylli (Puccinia podophylli) on underside of leaves of May apple (Podophyllum peltatum) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, March 4, 2023  Bright orange mayapple rust fungus Allodus podophylli (Puccinia podophylli) on underside of leaves of May apple (Podophyllum peltatum) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, March 21, 2023  Close-up of bright orange cups of mayapple rust fungus Allodus podophylli (Puccinia podophylli) on underside of leaves of May apple (Podophyllum peltatum) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, March 21, 2023  Wilted basal leaves of hairy elephant foot with pine needle rust fungus (Coleosporium elephantopi, Coleosporium elephantopodis) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest, near Huntsville. Texas, July 27, 2018  Pine needles with rust fungus Coleosporium asterum on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020  Pine needle rust fungus (Coleosporium elephantopi, Coleosporium elephantopodis) on basal leaves of hairy elephant foot (Elephantopus tomentosus(?)) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest, near Huntsville. Texas, July 27, 2018  Pine needles with pustules of rust fungus Coleosporium asterum on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020  White corticioid fungus on underside of a burned pine log on Richards Loop Trail in Sam Houston National Forest. Texas, July 23, 2023  Pine seedling with needle rust caused by fungus Coleosporium asterum on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020  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  Close-up of white web-like corticioid fungus on underside of a burned pine log on Richards Loop Trail in Sam Houston National Forest. Texas, July 23, 2023  Cauliflower mushroom (Sparassis spathulata) in Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, September 26, 2009  White partially dried corticioid fungus on underside of a burned pine log on Richards Loop Trail in Sam Houston National Forest. Texas, July 23, 2023  White corticioid fungus together with Gloeophyllum carbonarium on underside of a burned pine log on Richards Loop Trail in Sam Houston National Forest. Texas, July 23, 2023  White corticioid fungus together with other crust fungi on underside of a burned pine log on Richards Loop Trail in Sam Houston National Forest. Texas, July 23, 2023  Aecial pustules of a needle rust caused by fungus Coleosporium asterum on pine needles on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020  Web-like hyphae of white corticioid fungus together with Gloeophyllum carbonarium on underside of a burned pine log on Richards Loop Trail in Sam Houston National Forest. Texas, July 23, 2023  Spores of white smooth corticioid fungus from underside of burned pines, collected on Richards Loop Trail in Sam Houston National Forest four days before. Texas, July 27, 2023  Leaves of sassafras on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023  Red wrinkled leaves of an oak on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023  Red young leaves of oak on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023  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  Spores of brown bracket polypore mushroom Phellinopsis conchata(?) (Hymenochaetaceae) from a thin hawthorn(?), collected a day before in Sam Houston National Forest. Texas, January 2, 2024  Galls on leaves of goldenrod Solidago canadensis caused by gall midges Asteromyia carbonifera with symbiotic fungus Botryosphaeria dothidea on Richards Loop Trail in Sam Houston National Forest. Texas, July 10, 2022  Young wrinkled leaves of an oak on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023  Young orange leaves of an oak on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023  Wrinkled young leaves of oak on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023  Fresh green leaves of oak on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023  Spider on leaves of beautyberry on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023  Back lit leaves of willow oak on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023  Back lit leaves of sassafra on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023  Spores of some rust fungus from underside of leaves of jumpseed (knotweed, Persicaria virginiana) collected in Sam Houston National Forest near Montgomery. Texas, July 3, 2022  Orange-yellow rust fungus Puccinia poarum (Puccinia liatridis) on a leaf of gayfeather (Liatris) on Richards Loop Trail in Sam Houston National Forest. Texas, March 26, 2020  Leaves of farkleberry (Vaccinium arboreum)(?) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023  Red young leaves of mustang grape on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023  Spores of some rust fungus from underside of leaves of jumpseed (knotweed, Persicaria virginiana) at low magnification, collected in Sam Houston National Forest near Montgomery. Texas, July 3, 2022  Red leaves and flower buds of mustang grape on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023  Tiny bright orange cups of aecia on the underside of leaves of mayapple caused by mayapple rust fungus Allodus podophylli(Puccinia podophylli) on underside of leaves of May apple (Podophyllum peltatum) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest near Huntsville. Texas, March 2, 2019  Aecia of mayapple rust fungus Allodus podophylli (Puccinia podophylli) on underside of leaves of May apple on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, February 29, 2020  Young leaves of rattan vine (Berchemia scandens) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023  Fresh leaves of bracken fern (Pteridium aquilinum) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023  Aecia of mayapple rust fungus Allodus podophylli (Puccinia podophylli) on underside of leaves of May apple (Podophyllum peltatum) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest near Huntsville. Texas, March 2, 2019 |