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1625-09. 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

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Leaves of yaupon holly (Ilex vomitoria) with black spots caused by rust like fungus in Hensel Park. College Station, Texas, June 5, 2019
Leaves of yaupon holly (Ilex vomitoria) with black spots caused by rust like fungus on black background in Hensel Park. College Station, Texas, June 5, 2019
Leaves of May apple (Podophyllum peltatum) with yellow spots caused by 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
Blister-like pustules on underside and yellow-orange sunken spots on upper leaf surface of Geranium carolinianum caused by hollyhock or mallow rust fungus (Puccinia malvacearum), taken from a lawn near apartments on George Bush Drive. College Station, Texas, March 13, 2019
Leaves of May apple (mandrake, Podophyllum peltatum) with yellow spots caused by 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
Coltsfoot lower epidermis with rust (coltsfoot rust gall, Puccinia poarum) in Petiayarvi, north from Saint Petersburg. Russia, July 21, 2017
Oak leaves with brown spots caused by a fungus(?) on Richards Loop Trail in Sam Houston National Forest, Texas, November 19, 2020
Orange berry rust, fungus Gymnoconia peckiana (Arthuriomyces peckianus) on underside of leaves of raspberry near Lenin Trail in area of Razliv near Dibuny, north-west from Saint Petersburg, Russia, May 21, 2019
Tiny bright orange cups 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
Cedar-hawthorn rust fungus (Gymnosporangium globosum) on leaves of cockspur hawthorn in Lick Creek Park. College Station, Texas, May 7, 2018
Leaves of hawthorn with cedar-hawthorn rust fungus (Gymnosporangium globosum) in Lick Creek Park. College Station, Texas, April 18, 2018
Orange cap bolete mushroom Leccinum vulpinum in a forest in Petiayarvi, north from Saint Petersburg. Russia, July 17, 2015
Orange cap Bolete mushroom (Leccinum vulpinum, Russian name Podosinovik) in a forest in Petiayarvi, north from Saint Petersburg. Russia, July 17, 2015
May apple (mandrake, Podophyllum peltatum) with yellow spots caused by 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
Young leaves of mountain ash (Sorbus aucuparia, Russian name Ryabina) near Kavgolovskoe Lake in Toksovo, a suburb of Saint Petersburg, Russia, May 19, 2015
Back lit leaves of mountain ash (Sorbus aucuparia, Russian name Ryabina) near Kavgolovskoe Lake in Toksovo, a suburb of Saint Petersburg, Russia, May 19, 2015
Circular dark purplish red spots with centers fading with age caused by Deutero fungus (Cercospora smilacis) on leaves of common greenbrier (Smilax rotundifolia) on Richards Loop Trail in Sam Houston National Forest. Texas, May 10, 2020
Fleshy galls on cowberry leaves caused by the fungus Exobasidium vaccinii in Posiolok near Vyritsa, south from Saint Petersburg, Russia, July 9, 2017
Orange-brown bumps on underside of Geranium carolinianum leaf caused by hollyhock or mallow rust fungus (Puccinia malvacearum), taken from a lawn near apartments on George Bush Drive. College Station, Texas, March 13, 2019
Crust fungus Leucogyrophana mollusca on a fallen mountain ash on east side of sandpit near Kuzmolovo, north from Saint Petersburg. Russia, May 8, 2019
Red-brown rust fungus Puccinia punctiformis on the underside of the leaves of creeping thistle (Cirsium arvense) in Siverskaya, 50 miles south from Saint Petersburg. Russia, July 13, 2017
Dwarf sunflowers (Old-man-of-the-mountain, Rydbergia grandiflora, Hymenoxys grandiflora) on a slope of Colony Baldy Mountain in Sangre de Cristo Mountains. Colorado, July 3, 2007
Orange berry rust, fungus Gymnoconia peckiana (Arthuriomyces peckianus) on a shoot of raspberry near Lenin Trail in area of Razliv near Dibuny, north-west from Saint Petersburg, Russia, May 21, 2019
Crown Mountain, view from lower part of Juniper Canyon Trail. Big Bend National Park, Texas, November 23, 2007
Fresh leaves of mountain ash (Sorbus aucuparia, Russian name Ryabina) in Sosnovka Park. Saint Petersburg, Russia, May 20, 2017
Sepals of Mountain hydrangea (Hydrangea serrata) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 22, 2015
Flowers of mountain hydrangea (Hydrangea serrata) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 22, 2015
Cowberry with fleshy galls caused by the fungus Exobasidium vaccinii near Dibuny, north-west from Saint Petersburg. Russia, July 15, 2017
Mountain hydrangea (Hydrangea serrata, Russian name Gortenzia) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 22, 2015
Blue flowers of mountain hydrangea (Hydrangea serrata) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 22, 2015
Orange berry rust, fungus Gymnoconia peckiana (Arthuriomyces peckianus) on a shoot of raspberry on black background near Lenin Trail in area of Razliv near Dibuny, north-west from Saint Petersburg, Russia, May 21, 2019
Orange berries of Mountain Ash (Sorbus aucuparia, Ryabina) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, August 22, 2013
Flowers of mountain hydrangea (Hydrangea serrata) with drops of rain in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 22, 2015
Young silvery leaves of mountain ash (Sorbus aucuparia, Russian name Ryabina) in Pavlovsk Park, suburb of Saint Petersburg. Russia, May 15, 2011
Rust fungus Chrysomyxa pyrolae on the underside of leaves of shinleaf (Round-leaved Wintergreen, Pyrola rotundifolia) on Lenin Trail in area of Razliv near Dibuny, north-west from Saint Petersburg, Russia, May 11, 2019
Cedar-hawthorn rust fungus (Gymnosporangium globosum) on hawthorn in Lick Creek Park. College Station, Texas, April 18, 2018
Cedar apple rust fungus Gymnosporangium juniperi-virginianae on a twig of red cedar near a road along north shore of Lake Somerville near Birch Creek Unit Somerville Lake State Park. Texas, March 14, 2018
El Capitan Mountain from a trail at the foot of the mountain. Guadalupe Mountains National Park, Texas, December 27, 2007
El Capitan Mountain from southern foot of the mountain. Guadalupe Mountains National Park, Texas, December 27, 2007
Cedar-hawthorn rust fungus (Gymnosporangium globosum)(?) on hawthorn in Sam Houston National Forest, on Little Lake Creek Loop Trail. Richards, Texas, May 18, 2014
Mountain laurel flowers on Blue Trail in DeSoto State Park on Lookout Mountain. Fort Payne, Alabama, May 19, 2007
Rust fungus Puccinia urticata on leaves of common (stinging) nettle in Sosnovka Park. Saint Petersburg, Russia, May 27, 2017
Daisy with a horn beetle in Petiayarvi, north from Saint Petersburg. Russia, July 17, 2015
Hazel bracket fungus (Skeletocutis nivea)(?) on a dry mountain ash tree in Sosnovka Park. Saint Petersburg, Russia, August 14, 2017
Wrinkled crust fungus (Phlebia radiata mushroom) on a mountain ash tree in Sosnovka Park. Saint Petersburg, Russia, February 14, 2017
Heath speedwell (Veronica officinalis) in a forest in Petiayarvi, north from Saint Petersburg. Russia, July 17, 2015
Texture of wrinkled crust fungus (Phlebia radiata mushroom) on a mountain ash tree in Sosnovka Park. Saint Petersburg, Russia, February 17, 2017
Jackrogersella multiformis (Annulohypoxylon multiforme) fungus (family Xylariaceae) on a fallen mountain ash(?) tree near Lisiy Nos, west from Saint Petersburg. Russia, May 6, 2019
Leaves of bitter dock (Rumex obtusifolius) with reddish purple blotches caused by fungus Puccinia phragmitis (Venturia rumicis) in Sosnovka Park. Saint Petersburg, Russia, May 30, 2019
Reddish purple blotches on leaves of bitter dock (Rumex obtusifolius) caused by fungus Puccinia phragmitis (Venturia rumicis) in Sosnovka Park. Saint Petersburg, Russia, May 30, 2019
Golden Mountain Cascade in Lower Gardens. Peterhof (Petrodvorets), a suburb of Saint Petersburg. Russia, September 28, 2015
Chess Mountain Cascade in Lower Gardens. Peterhof (Petrodvorets), a suburb of Saint Petersburg. Russia, September 28, 2015
Orange rosette of leaves in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 22, 2015
Pine seedling with needle rust caused by fungus Coleosporium asterum on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Candlesnuff fungus (carbon antlers mushrooms, Xylaria hypoxylon) on a stump of swida or mountain ash in Sosnovka Park. Saint Petersburg, Russia, October 31, 2016
Leaves of skunk cabbage on pipeline right of way crossing a creek in Mountain Lakes North park. Princeton, New Jersey, April 27, 2007
Fountains of Golden Mountain Cascade in Lower Gardens. Peterhof (Petrodvorets), a suburb of Saint Petersburg. Russia, September 28, 2015
Fly on a leaf of mountain ash (Sorbus aucuparia, Russian name Ryabina) near Kavgolovskoe Lake in Toksovo, a suburb of Saint Petersburg, Russia, May 19, 2015
Red-brown rust fungus Puccinia punctiformis on the underside of the leaves of creeping thistle (Cirsium arvense) taken from area of Udelnaya. Saint Petersburg, Russia, August 11, 2017
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
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
Blooming rupturewort (Herniaria glabra, Russian name Gryzhnik) near railroad in Petiayarvi, north from Saint Petersburg. Russia, July 17, 2015
Smooth rupturewort (Herniaria glabra, Russian name Gryzhnik) near railroad in Petiayarvi, north from Saint Petersburg. Russia, July 17, 2015
Mountain ash in Urochishche Hianikiayze area near Kuzmolovo, north from Saint Petersburg. Russia, September 24, 2017
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
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
Blooming thyme (Thymus serpyllum, Russian name Chabrets) on roadside in a forest in Petiayarvi, north from Saint Petersburg. Russia, July 17, 2015
Close up of smooth rupturewort (Herniaria glabra, Russian name Gryzhnik) near railroad in Petiayarvi, north from Saint Petersburg. Russia, July 17, 2015
Shoot of smooth rupturewort (Herniaria glabra, Russian name Gryzhnik) near railroad in Petiayarvi, north from Saint Petersburg. Russia, July 17, 2015
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
El Capitan Mountain at sunset, view from lower Roadside Park south from the mountain. Guadalupe Mountains National Park, Texas, December 28, 2007
Fir-oak-fern rust (Hyalopsora aspidiotus) fungus on a leaf of northern oak fern Gymnocarpium dryopteris near Kavgolovskoe Lake in Toksovo, north from Saint Petersburg. Russia, July 14, 2017
Mountain moss Psilocybe mushrooms (Psilocybe montana, Deconica montana) on a site of an old bonfire near Kavgolovskoe Lake south from Oselki, 8 miles north from Saint Petersburg. Russia, July 25, 2017
Rust fungus Chrysomyxa pyrolae on the underside of leaves of shinleaf (Round-leaved Wintergreen, Pyrola rotundifolia) in area of Dibuny - Pesochny, near Saint Petersburg. Russia, June 3, 2017
Pink flowers of narrow-leaved everlasting-pea (Lathyrus sylvestris, Russian name Cheena) in Petiayarvi, north from Saint Petersburg. Russia, July 17, 2015
Feathering of the hairs on fruits of Hare s-foot clover (Trifolium arvense) near railroad in Petiayarvi, north from Saint Petersburg. Russia, July 17, 2015
The Greasy bracket polypore mushrooms (Aurantiporus fissilis)(?) on a mountain ash tree in Sosnovka Park. Saint Petersburg, Russia, July 16, 2017
Leaves of skunk cabbage on pipeline right of way crossing a creek north from Mountain Lakes in John Witherspoon Woods park. Princeton, New Jersey, April 27, 2007
Flower buds of Mountain Ash (Sorbus aucuparia, Ryabina) in Orekhovo, north from Saint Petersburg. Russia, June 5, 2014
Common inkcap (inky cap) mushrooms Coprinopsis atramentaria at the base of mountain ash(?) tree in Sosnovka Park. Saint Petersburg, Russia, July 30, 2017
Cowberry with fleshy galls caused by the fungus Exobasidium vaccinii taken from Posiolok near Vyritsa, south from Saint Petersburg, Russia, July 9, 2017
Close up of Mountain Ash (Sorbus aucuparia, Ryabina) flowers in Lembolovo, 40 miles north from Saint Petersburg. Russia, June 12, 2009
Fleshy gall on a cowberry leaf caused by the fungus Exobasidium vaccinii taken from Posiolok near Vyritsa, south from Saint Petersburg, Russia, July 9, 2017
Corticioid mushroom Leucogyrophana mollusca on a fallen mountain ash on east side of sandpit near Kuzmolovo, north from Saint Petersburg. Russia, May 8, 2019
Corticioid mushroom Leucogyrophana mollusca on a decaying trunk of mountain ash on east side of sandpit near Kuzmolovo, north from Saint Petersburg. Russia, May 8, 2019
Texture of corticioid mushroom Leucogyrophana mollusca on a fallen mountain ash on east side of sandpit near Kuzmolovo, north from Saint Petersburg. Russia, May 8, 2019
Wood decay mushroom Leucogyrophana mollusca on a fallen mountain ash on east side of sandpit near Kuzmolovo, north from Saint Petersburg. Russia, May 8, 2019
Red crust of corticioid mushroom Leucogyrophana mollusca on a fallen mountain ash on east side of sandpit near Kuzmolovo, north from Saint Petersburg. Russia, May 8, 2019
Close up of corticioid mushroom Leucogyrophana mollusca on a fallen mountain ash on east side of sandpit near Kuzmolovo, north from Saint Petersburg. Russia, May 8, 2019
Blooming Mountain Ash (rowan tree, Sorbus aucuparia, Russian name Ryabina) in Lembolovo, 40 miles north from Saint Petersburg. Russia, June 12, 2009
Fungus of creeping thistle rust (Puccinia punctiformis) in Siverskaya, 50 miles south from Saint Petersburg. Russia, July 13, 2017
Creeping thistle rust fungus (Puccinia punctiformis) in Siverskaya, 50 miles south from Saint Petersburg. Russia, July 13, 2017
Orange birch bolete mushroom (Leccinum versipelle, Podosinovik) in Petiayarvi, 50 miles north from Saint Petersburg. Russia, August 31, 2013
Blooming Mountain Cranberry (lingonberry, cowberry, Vaccinium vitis-idaea, Russian name Brusnika) in Lembolovo, 40 miles north from Saint Petersburg. Russia, June 12, 2009
Rust fungus Chrysomyxa pyrolae on lower surface of a leaf of shinleaf near Kuzmolovo, north from Saint Petersburg. Russia, May 8, 2019
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
Mountain brownie mushrooms (Deconica montana, Psilocybe montana) near Orekhovo, 45 miles north from Saint Petersburg. Russia, August 27, 2017
Large bay cup fungus (Peziza badia)(?) in Petiayarvi, north from Saint Petersburg. Russia, September 17, 2017
Mountain brownie mushrooms (Deconica montana, Psilocybe montana) collected near Orekhovo, 45 miles north from Saint Petersburg. Russia, August 27, 2017

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