 Tiny bright orange cups on aecia of mayapple rust fungus (Allodus podophylli, Puccinia podophylli) underside of a leaf of May apple (Podophyllum peltatum) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest near Huntsville. Texas, March 16, 2019
 Tiny bright orange cups on aecia of mayapple rust fungus (Allodus podophylli, Puccinia podophylli) underside of a leaf 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
 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
 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
 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
 Underside of a leaf of May apple (Podophyllum peltatum) with aecia of mayapple rust fungus (Allodus podophylli, Puccinia podophylli) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest near Huntsville. Texas, March 16, 2019
 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
 Underside of a leaf of May apple (Podophyllum peltatum) with aecia of mayapple rust fungus Allodus podophylli (Puccinia podophylli) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, March 10, 2022
 Underside of a leaf of May apple (Podophyllum peltatum) with aecia of mayapple rust fungus (Allodus podophylli, Puccinia podophylli) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, March 4, 2023
 Young plants of May apple (Podophyllum peltatum) with aecia of mayapple rust fungus Allodus podophylli (Puccinia podophylli) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest near Huntsville. Texas, March 2, 2019
 Leaves of May apple (mandrake, Podophyllum peltatum) with yellow spots caused by teleutosori of mayapple rust fungus Allodus podophylli (Puccinia podophylli) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest, near Huntsville. Texas, May 5, 2018
 May apple (mandrake, Podophyllum peltatum) with yellow spots caused by teleutosori of mayapple rust fungus Allodus podophylli (Puccinia podophylli) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest near Huntsville. Texas, March 30, 2019
 Leaves of May apple (Podophyllum peltatum) with yellow spots caused by teleutosori of mayapple rust fungus Allodus podophylli (Puccinia podophylli) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, March 23, 2020
 Leaves of May apple (Podophyllum peltatum) with yellow spots caused by teleutosori of mayapple rust fungus Allodus podophylli (Puccinia podophylli) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 23, 2022
 Leaf of of May apple (Podophyllum peltatum) with aecia of mayapple rust fungus Allodus podophylli (Puccinia podophylli) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, March 10, 2022
 Underside of a leaf of May apple (mandrake, Podophyllum peltatum) with brown teleutospores of mayapple rust fungus Allodus podophylli (Puccinia podophylli) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest, near Huntsville. Texas, May 5, 2018
 Young plants of May apple (Podophyllum peltatum) with aecia of mayapple rust fungus Allodus podophylli (Puccinia podophylli) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, March 4, 2023
 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
 Underside of a leaf of May apple (Podophyllum peltatum) with brown teleutosori of mayapple rust fungus Allodus podophylli (Puccinia podophylli) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 10, 2021
 Brown teleutospores of mayapple rust fungus Allodus podophylli (Puccinia podophylli) on underside of a leaf of May apple (Podophyllum peltatum) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 10, 2021
 Underside of a leaf of May apple (mandrake, Podophyllum peltatum) with brown teleutospores of mayapple rust fungus Allodus podophylli (Puccinia podophylli) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 23, 2022
 Vein-bordered yellow areas on the leaf of May apple (mandrake, Podophyllum peltatum) with teleutosori of mayapple rust fungus Allodus podophylli (Puccinia podophylli) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest, near Huntsville. Texas, May 5, 2018
 Underside of May apple leaf with teleutosori of mayapple rust fungus Allodus podophylli (Puccinia podophylli) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 6, 2024
 Close-up of underside of May apple leaf with teleutosori of mayapple rust fungus Allodus podophylli (Puccinia podophylli) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 6, 2024
 Close-up of teleutosori of rust fungus Allodus podophylli (Puccinia podophylli) on underside of a leaf of May apple (Podophyllum peltatum) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 10, 2021
 May apple leaf with yellow spots caused by teleutosori of mayapple rust fungus Allodus podophylli (Puccinia podophylli) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 6, 2024
 Yellow spots on a leaf of May apple (Podophyllum peltatum) caused by teleutosori of rust fungus Allodus podophylli (Puccinia podophylli) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 10, 2021
 Spores (teleutosori) of mayapple rust fungus Allodus podophylli (Puccinia podophylli) collected on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, April 6, 2024
 Spores (teleutosori) at low magnification of mayapple rust fungus Allodus podophylli (Puccinia podophylli) collected on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, April 6, 2024
 Two different kinds of spores (orange Aeciospores and black teliospores) of mayapple rust fungus (Puccinia podophylli) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 16, 2022
 Aeciospores (orange) of mayapple rust fungus (Puccinia podophylli) collected in Sam Houston National Forest. Texas, March 4, 2023
 Aeciospores (orange) and some other spores of mayapple rust fungus (Puccinia podophylli) collected in Sam Houston National Forest. Texas, March 4, 2023
 Orange aeciospores under a microscope of mayapple rust fungus (Puccinia podophylli), collected in Sam Houston National Forest. Texas, March 4, 2023
 Aeciospores (orange) of mayapple rust fungus (Puccinia podophylli) collected in Sam Houston National Forest near Montgomery. Texas, April 16, 2022
 Various spores of mayapple rust fungus (Puccinia podophylli) collected in Sam Houston National Forest. Texas, March 4, 2023
 Aeciospores of rust fungus Puccinia podophylli from a May apple leaf under a microscope, collected from Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, March 10, 2022
 Aeciospores of rust fungus Puccinia podophylli from a May apple leaf under a microscope at higher magnification, collected on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, March 10, 2022
 Teliospores (teleutospores) of mayapple rust fungus (Puccinia podophylli) under a microscope, collected in Sam Houston National Forest. Texas, April 23, 2022
 Teliospores (teleutospores, black) of mayapple rust fungus (Puccinia podophylli) in KOH, collected in Sam Houston National Forest near Montgomery. Texas, April 9, 2023
 Teliospores (teleutospores) of mayapple rust fungus (Puccinia podophylli) under a microscope at low magnification, collected in Sam Houston National Forest. Texas, April 23, 2022
 Teliospores (teleutospores, black) of mayapple rust fungus (Puccinia podophylli) collected in Sam Houston National Forest near Montgomery. Texas, April 16, 2022
 Teliospores (teleutospores, black) of mayapple rust fungus (Puccinia podophylli) under a microscope, collected in Sam Houston National Forest near Montgomery. Texas, April 16, 2022
 Teliospores (teleutospores, black) of mayapple rust fungus (Puccinia podophylli) under a microscope at low magnification, collected in Sam Houston National Forest near Montgomery. Texas, April 16, 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
 Young 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 10, 2022
 Flower 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
 Young leaves and a flower bud of May apple (Podophyllum peltatum) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, March 7, 2021
 Young plant 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
 Flower bud of May apple (mandrake, Podophyllum peltatum) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest near Huntsville. Texas, March 2, 2019
 Fresh leaves of May apple (Podophyllum peltatum) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, February 25, 2024
 Fresh leaves of May apple (Podophyllum peltatum) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, February 9, 2020
 Blooming May apple (mandrake, Podophyllum peltatum) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest, near Huntsville. Texas, March 10, 2018
 Leaves and a flower bud of May apple (Podophyllum peltatum) on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, March 1, 2019
 Underside of greenbrier leaves with rust fungus Puccinia smilacis, collected on Richards Loop Trail in Sam Houston National Forest. Texas, March 9, 2022
 May apple (Podophyllum peltatum) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, March 19, 2021
 Flower bud of May apple (Podophyllum peltatum) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, March 7, 2021
 Leaf of May apple (Podophyllum peltatum) in Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, March 20, 2022
 Flower bud of May apple (Podophyllum peltatum) in Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, March 20, 2022
 Flower of May apple (Podophyllum peltatum) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, March 10, 2024
 Blooming 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
 Flower of May apple (Podophyllum peltatum) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, March 31, 2022
 Leaf spots fungi(?) on underside of leaves of yaupon holly taken from Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest near Huntsville. Texas, March 30, 2019
 Shoot of May apple (Podophyllum peltatum) with a flower bud in Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, March 20, 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
 Purple underside of leaves of crippled crane-fly orchid (Tipularia discolor) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest near Huntsville. Texas, March 2, 2019
 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
 Flower bud of May apple (Podophyllum peltatum) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, February 9, 2020
 Leaf of May apple (Podophyllum peltatum) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, February 25, 2023
 Flower bud of May apple (Podophyllum peltatum) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, February 25, 2024
 Fruit of May apple (Podophyllum peltatum) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 10, 2021
 Young leaf of May apple (Podophyllum peltatum) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, February 9, 2020
 Leaf venation of May apple (Podophyllum peltatum) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, February 9, 2020
 Young leaves of trifoliate orange (Poncirus trifoliata) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest near Huntsville. Texas, March 30, 2019
 Orange-brown bumps on underside of leaf of Carolina bristlemallow (Modiola caroliniana) caused by rust fungus Puccinia modiolae, taken from a lawn near apartments on George Bush Drive. College Station, Texas, March 13, 2019
 Bright orange leaves of a seedling of poison ivy on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, December 28, 2023
 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
 Greenbrier leaves with rust fungus Puccinia smilacis, collected on Richards Loop Trail in Sam Houston National Forest. Texas, March 9, 2022
 Young leaves of elm on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest near Huntsville. Texas, March 30, 2019
 Young leaves of elm on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest near Huntsville. Texas, March 16, 2019
 Young leaves of oak on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest near Huntsville. Texas, March 16, 2019
 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
 Rust fungus Puccinia smilacis on greenbrier leaves under a microscope, collected on Richards Loop Trail in Sam Houston National Forest. Texas, March 9, 2022
 Young red cottony leaves on an oak on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest near Huntsville. Texas, March 2, 2019
 Fresh red cottony leaves on an oak on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest near Huntsville. Texas, March 2, 2019
 Tiny white cups of Ascomycete fungus Hyaloscypha britannica under a fallen pine on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, December 15, 2019
 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
 Young leaves of Virginia creeper on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest near Huntsville. Texas, March 16, 2019
 Blister-like pustules on underside and yellow-orange sunken spots on upper leaf surface of Carolina bristlemallow (Modiola caroliniana) caused by rust fungus Puccinia modiolae, taken from a lawn near apartments on George Bush Drive. College Station, Texas, March 13, 2019
 Underside of leaves of wood sorrel Oxalis stricta with rust fungus Puccinia oxalidis in Bee Creek Park. College Station, Texas, March 29, 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
 Young leaves of Virginia creeper on a tree on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest near Huntsville. Texas, March 2, 2019
 Fresh leaves of sweet gum (Liquidambar styraciflua) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest near Huntsville. Texas, March 16, 2019
 Young leaves of sweet gum (Liquidambar styraciflua) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest near Huntsville. Texas, March 16, 2019
 Orange underside with trapped spores of fungus Sporophagomyces chrysostomus attached below a resupinate polypore mushroom Fuscoporia on underside of a fallen broadleaf tree on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 12, 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
 Young leaves of black cherry Prunus serotina(?) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest near Huntsville. Texas, March 30, 2019
 Leaves of crippled crane-fly orchid (Tipularia discolor) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest near Huntsville. Texas, March 2, 2019
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