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2704-03. Dark red spots of Deutero fungus (Neocercosporidium smilacis, Cercospora smilacis) on leaves of common greenbrier (Smilax rotundifolia) on Richards Loop Trail in Sam Houston National Forest. Texas, May 10, 2020Similar picturesLarge thumbnails | Use small thumbnails | View as slideshow |
 Circular dark purplish red spots with centers fading with age caused by Deutero fungus (Neocercosporidium smilacis, Cercospora smilacis) on leaves of common greenbrier (Smilax rotundifolia) on Richards Loop Trail in Sam Houston National Forest. Texas, May 10, 2020  Deutero fungus (Neocercosporidium smilacis, Cercospora smilacis) on leaves of common greenbrier (Smilax rotundifolia) on Richards Loop Trail in Sam Houston National Forest. Texas, May 10, 2020  Deutero fungus (Neocercosporidium smilacis, Cercospora smilacis) on leaves of common greenbrier (Smilax rotundifolia) on Richards Loop Trail in Sam Houston National Forest. Texas, June 29, 2022  Leaves of Common Greenbrier (Smilax rotundifolia) mottled "leopard print" look on black background. The red spots often form around areas of minor stress. Smilax leaves notoriously host various benign fungal endophytes or leaf spots (like Cercospora or Puccinia). In autumn, the tissues surrounding these tiny infection points often turn bright red (producing anthocyanin as a defense mechanism) long before the rest of the yellowing leaf dies, creating this vivid speckled contrast. Richards Loop Trail in Sam Houston National Forest. Texas, November 15, 2025  Greenbrier leaves with rust fungus Puccinia smilacis, 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  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  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  Red leaves of common greenbrier (Smilax rotundifolia) on Richards Loop Trail in Sam Houston National Forest. Texas, January 21, 2024  Thorns of common greenbrier (Smilax rotundifolia) on Richards Loop Trail in Sam Houston National Forest, Texas, November 19, 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  Leaves of Common Greenbrier (Smilax rotundifolia) mottled "leopard print" look on the ground, showing a mix of nutrient recycling (yellow) and stress reaction (red) on Richards Loop Trail in Sam Houston National Forest. Texas, November 15, 2025  Green, red and orange colors of leaves of greenbrier (Smilax rotundifolia) on Richards Loop Trail in Sam Houston National Forest near Montgomery. Texas, December 18, 2025  Leaves of greenbrier (Smilax rotundifolia) turned brilliant shades of red, orange, and bronze on Richards Loop Trail in Sam Houston National Forest. Texas, December 12, 2025  Speckled, leopard coloration of greenbrier (Smilax rotundifolia) on Richards Loop Trail in Sam Houston National Forest near Montgomery. Texas, December 18, 2025  Shoot of greenbrier (Smilax) on Richards Loop Trail in Sam Houston National Forest. Texas, May 10, 2020  Shoot of greenbrier (Smilax) with tendrils on Richards Loop Trail in Sam Houston National Forest. Texas, May 10, 2020  Tendrils of greenbrier (Smilax) on Richards Loop Trail in Sam Houston National Forest. Texas, July 28, 2020  Yellow leaves of laurel greenbrier (catbriar, bamboo vine, Smilax laurifolia) on Richards Loop Trail in Sam Houston National Forest. Texas, July 10, 2022  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  Oak leaves with brown spots caused by a fungus(?) on Richards Loop Trail in Sam Houston National Forest, Texas, November 19, 2020  Leaves of saw Greenbrier (Smilax bona-nox) on a burned pine log with striking "mottled red" appearance where the white variegation "punches through" the red fall color. Richards Loop Trail in Sam Houston National Forest. Texas, November 15, 2025  Shoot of common greenbrier (Smilax rotundifolia) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, July 19, 2020  Caterpillar Phosphila turbulenta on a tendril of greenbrier (Smilax) on Richards Loop Trail in Sam Houston National Forest. Texas, April 13, 2024  Leaves of saw Greenbrier (Smilax bona-nox) showing natural genetic expression and seasonal aging. The white/cream blotches in the center of the leaves are likely natural variegation. In November, the green chlorophyll has died off to reveal the red anthocyanins (fall color). Richards Loop Trail in Sam Houston National Forest. Texas, November 15, 2025  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  Orange caterpillar Phosphila turbulenta on shoots of greenbrier (Smilax) on Richards Loop Trail in Sam Houston National Forest. Texas, April 13, 2024  Young leaves of Muscadine Grape (Vitis rotundifolia) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020  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  Young leaves of greenbrier (Smilax) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, March 4, 2023  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  Black spots of fungus Lophodermium (Rhytismataceae) on fallen pine needles on Richards Loop Trail in Sam Houston National Forest. Texas, April 6, 2020  White corticioid (crust) fungus on a pine log turning orange in several spots on Richards Loop Trail in Sam Houston National Forest. Texas, December 24, 2020  Leaves of blackjack oak and greenbrier on Richards Loop Trail in Sam Houston National Forest. Texas, June 29, 2022  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  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  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  Leaves of hickory with black spots and holes caused by insects(?) on Richards Loop Trail in Sam Houston National Forest. Texas, June 2, 2021  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  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  Tuberous roots of greenbrier vine (smilax) unearthed by animals on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, July 16, 2021  Dark-red leaves of sweetgum on Richards Loop Trail in Sam Houston National Forest near Montgomery. Texas, December 18, 2025  Red and dark-red leaves of sweetgum on Richards Loop Trail in Sam Houston National Forest near Montgomery. Texas, December 18, 2025  Deep dark-red leaves of sweetgum on Richards Loop Trail in Sam Houston National Forest near Montgomery. Texas, December 18, 2025  Spores of some fungus from tar spots on lower parts of dry Arundinaria (bamboo) collected on Richards Loop Trail in Sam Houston National Forest. Texas, February 5, 2023  Dark-red leaves of flameleaf sumac (Rhus lanceolata) on Richards Loop Trail in Sam Houston National Forest. Texas, November 15, 2025  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  Giraffe Spots mushrooms (Peniophora albobadia) on a fallen twig on Sand Branch Loop Trail in Sam Houston National Forest near Richards. Texas, November 20, 2020  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  Dark red cap of a bolete mushroom on a steep side of a creek on Richards Loop Trail in Sam Houston National Forest. Texas, September 25, 2020  Some dark red mature bolete mushrooms with yellow pores on Richards Loop Trail in Sam Houston National Forest. Texas, September 25, 2020  Dark brown corticioid fungus Tomentella on burned pine on Richards Loop Trail in Sam Houston National Forest. Texas, February 18, 2023  Underside of dark red mature bolete mushrooms with yellow pores on Richards Loop Trail in Sam Houston National Forest. Texas, September 25, 2020  Dark brown corticioid fungus Tomentella on underside of a burned pine log on Richards Loop Trail in Sam Houston National Forest. Texas, February 18, 2023  Cross section of dark red mature bolete mushrooms with yellow pores on Richards Loop Trail in Sam Houston National Forest. Texas, September 25, 2020  Muscadine Grape (Vitis rotundifolia) in Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, May 26, 2012  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  Dark berries of greenbrier vine (prickly-ivy, smilax, sarsaparilla) taken from Lick Creek Park. College Station, Texas, November 1, 2012  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  Clusters of dark berries of greenbrier vine (prickly-ivy, smilax, sarsaparilla) taken from Lick Creek Park. College Station, Texas, November 1, 2012  Common rush (Juncus effusus(?)) in a small lake on Sand Branch Loop Trail in Sam Houston National Forest near Richards. Texas, November 20, 2020  Common rustgill mushrooms (Gymnopilus penetrans) on rotting pine wood on Richards Loop Trail in Sam Houston National Forest. Texas, December 15, 2020  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  Young oak leaves on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020  Young oak leaves on Richards Loop Trail in Sam Houston National Forest. Texas, June 27, 2020  Young red leaves of an oak on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020  Green lynx spider on a leaf of greenbrier on Richards Loop Trail in Sam Houston National Forest. Texas, July 29, 2021  Cross section of stems of common rush (Juncus effusus(?)) on Sand Branch Loop Trail in Sam Houston National Forest near Richards. Texas, November 20, 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  Dark mossy caps of hairy curtain crust fungus (Stereum hirsutum(?)) on an oak log on Little Lake Loop Trail in Sam Houston National Forest east from Trail Head No. 4, near Montgomery. Texas, November 29, 2020  Some young glossy leaves on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020  Shoot with glossy leaves on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020  Young leaves of sweetgum on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020  Young leaves of sumac(?) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020  Young leaves of sumac(?) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020  Distorted growth of oak leaves on Richards Loop Trail in Sam Houston National Forest. Texas, July 28, 2020  Yellow leaves of hickory on Richards Loop Trail in Sam Houston National Forest. Texas, December 15, 2020  Young leaves of sassafras on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020  Black fungus Sphaeria subiculata (Rosellinia subiculata)(?) on whitish spots on a log of a broadleaf tree on South Wilderness Loop Trail at Little Lake Creek Wilderness in Sam Houston National Forest near Richards. Texas, January 14, 2023  Cap with a dark center of a grizette mushroom (Amanita sect. Vaginatae), could be Amanita luzernensis(?), on Richards Loop Trail in Sam Houston National Forest. Texas, September 25, 2020  Cross section of common rustgill mushrooms (Gymnopilus penetrans) on rotting pine wood on Richards Loop Trail in Sam Houston National Forest. Texas, December 15, 2020  Tremella aurantia mushroom parasitizing common wood rotter Stereum hirsutum on a fallen oak on Richards Loop Trail in Sam Houston National Forest. Texas, September 25, 2020  Common rustgill mushrooms (Gymnopilus penetrans) with side view on rotting pine wood on Richards Loop Trail in Sam Houston National Forest. Texas, December 15, 2020  Common white resupinate polypore mushroom on thin bark of a fallen pine branch on Richards Loop Trail in Sam Houston National Forest, Texas, November 19, 2020  Black spots with holes on a shoot of hickory on Richards Loop Trail in Sam Houston National Forest. Texas, June 2, 2021  Fresh leaves of Virginia creeper on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020  Young leaves of elm on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, March 8, 2020  Leaves of coralbean (Erythrina herbacea) on Richards Loop Trail in Sam Houston National Forest, Texas, November 19, 2020  Young leaves of Virginia creeper on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020  Dark berries of greenbrier vine (prickly-ivy, smilax, sarsaparilla) in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 18, 2008  Young leaves of southern wax myrtle (Myrica cerifera) on Richards Loop Trail in Sam Houston National Forest. Texas, May 10, 2020  Young leaves of blackjack oak (Quercus marilandica) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020  Curved leaves of bracken ferm with insect eggs on Richards Loop Trail in Sam Houston National Forest. Texas, May 10, 2020  Phylloxera galls on hickory leaves on Sand Branch Loop Trail in Sam Houston National Forest near Richards. Texas, May 2, 2020  Fresh leaves of blackjack oak on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, March 8, 2020 |