| 1400113 |
chestnut blight or canker |
Cryphonectria parasitica |
Canker on main stem; note dead branch in center of canker, discolored bark, and orange bumps (stroma) breaking through killed bark. |
| 1400098 |
Armillaria root rots |
Armillaria spp. |
Rhizomorphs on dead oak |
| 1400112 |
chestnut blight or canker |
Cryphonectria parasitica |
Lethal canker on main stem, with bark discoloration and orange stroma. |
| 1400067 |
turkey tail |
Trametes versicolor |
On decaying log in Wisconsin maple stand. |
| 1400114 |
chestnut blight or canker |
Cryphonectria parasitica |
Orange stroma of cryphonectria emerging through bark of canker. |
| 1400144 |
Eutypella canker |
Eutypella parasitica |
canker on maple in a Wisconsin sugarbush stand. |
| 1400120 |
Phomopsis cankers and twig blights |
Phomopsis spp. |
Phomopsis galls on the main stem of bitternut hickory in Wisconsin. |
| 1400108 |
Hypoxylon cankers |
Hypoxylon spp. |
Canker (discolored, sunken area on bark) on aspen |
| 1400103 |
Armillaria root rots |
Armillaria spp. |
Dying aspen, Nicolet National Forest, Wisconsin. Bark cut away to show strip kill on stem. Bark on root cut away to show armillaria rhizomorphs. See image #1400102. |
| 1400102 |
Armillaria root rots |
Armillaria spp. |
Armillaria rhizomorph under bark of root on declining (but still alive) aspen. See image #1400103. Nicolet National Forest, Wisconsin. |
| 1400025 |
birch conk |
Piptoporus betulinus |
conks on dead paper birch in northern Minnesota. |
| 1400041 |
clinker polypore |
Inonotus obliquus |
Conk on live paper birch, Ottawa National Forest, Michigan. |
| 1400026 |
birch conk |
Piptoporus betulinus |
conk on dead paper birch, northern Minnesota. |
| 1400033 |
elm oyster |
Hypsizygus tessulatus |
|
| 1400023 |
yellow cap fungi |
Pholiota spp. |
Inside cavity of living basswood. |
| 1400024 |
white heartwood rot |
Phellinus tremulae |
Nicolet National Forest |
| 1400040 |
clinker polypore |
Inonotus obliquus |
conk on live paper birch, Ottawa National Forest, Michigan. |
| 1400038 |
northern tooth |
Climacodon septentrionalis |
On live sugar maple, Sylvania Wilderness, Ottawa National Forest, Upper Peninsula, Michigan. |
| 1400036 |
northern tooth |
Climacodon septentrionalis |
Upper Peninsula, Michigan |
| 1400053 |
trunk rot |
Peniophora rufa |
|
| 1400018 |
Rimosus decay |
Phellinus robiniae |
On live tree, Pershing State Park, Missouri. |
| 1400142 |
Septoria leaf spot and cankers |
Septoria spp. |
On a susceptible clone of hybrid poplar. |
| 1400172 |
zonate leaf spot |
Grovesinia pyramidalis |
|
| 1400039 |
yellow cap fungi |
Pholiota spp. |
Sylvania Wilderness |
| 1400109 |
black rot |
Ceratocystis fimbriata |
Canker on high elevation aspen, Bristlecone Trail, Toiyabe National Forest. |
| 1400173 |
zonate leaf spot |
Grovesinia pyramidalis |
|
| 1400155 |
beech bark disease |
Nectria coccinea |
Cankered stem of beech following attack by beech scale and infection by Neonectria (beech bark disease complex) in Ontario. |
| 1400143 |
zonate leaf spot |
Grovesinia pyramidalis |
|
| 1400022 |
canker rot |
Cerrena unicolor |
Upper and lower surface of fruiting bodies. |
| 1400021 |
northern tooth |
Climacodon septentrionalis |
|
| 1400027 |
oyster mushroom |
Pleurotus ostreatus |
|
| 1400030 |
false turkey tail |
Stereum ostrea |
False turkeytails (note the smooth underneath surface, which distinguishes them from Trametes [turkeytails], which have pores on the underneath surface) on dead oak log. |
| 1400107 |
Hypoxylon cankers |
Hypoxylon spp. |
Stroma |
| 1400152 |
Dutch elm disease |
Ophiostoma ulmi |
|
| 1400106 |
Hypoxylon cankers |
Hypoxylon spp. |
(on broken stem), |
| 1400104 |
Nectria canker |
Nectria spp. |
"target canker" on aspen, Nicolet National Forest, Wisconsin. |
| 1400153 |
Dutch elm disease |
Ophiostoma ulmi |
Dying elm, marked for removal. July |
| 1400171 |
zonate leaf spot |
Grovesinia pyramidalis |
|
| 1400037 |
northern tooth |
Climacodon septentrionalis |
On live sugar maple in Sylvania Wilderness, Upper Peninsula, Michigan. |
| 1400116 |
basal cankers |
|
Swollen butt and woodpecker damage. At the time this photo was taken, this tree had no signs of chestnut blight. The swollen butt and woodpecker damage seemed to be unrelated to chestnut blight. The tree has since succombed to the disease. |
| 1400029 |
Violet-toothed Polypore |
Trichaptum biforme |
Conks on dead branch |
| 1400079 |
Ramaria fungi |
Ramaria spp. |
coral fungus on rotting log, Michigan maple forest in August. |
| 1400031 |
milk-white toothed polypore |
Irpex lacteus |
|
| 1400032 |
artist's conk |
Ganoderma applanatum |
on dead hardwood stump. |
| 1400123 |
black knot |
Apiosporina morbosa |
Ottawa National Forest |
| 1400111 |
chestnut blight or canker |
Cryphonectria parasitica |
orange colored stroma of cryphonectria on main stem around base of dead branch. |
| 1400174 |
Dutch elm disease |
Ophiostoma ulmi |
American elm tree removal |
