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USDA Forest Service

USDA Forest Service

The U.S. Department of Agriculture Forest Service is a Federal agency that manages public lands in national forests and grasslands. The Forest Service is also the largest forestry research organization in the world, and provides technical and financial assistance to state and private forestry agencies. Gifford Pinchot, the first Chief of the Forest Service, summed up the purpose of the Forest Service—"to provide the greatest amount of good for the greatest amount of people in the long run."
Remove Filters: Stem Decays and Cankers(X) Linda Haugen(X) Portrait(X)
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Image Subject Name Scientific Name Description
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.
1400112 chestnut blight or canker Cryphonectria parasitica Lethal canker on main stem, with bark discoloration and orange stroma.
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
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.
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.
1400036 northern tooth Climacodon septentrionalis Upper Peninsula, Michigan
1400039 yellow cap fungi Pholiota spp. Sylvania Wilderness
1400109 black rot Ceratocystis fimbriata Canker on high elevation aspen, Bristlecone Trail, Toiyabe National Forest.
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.
1400021 northern tooth Climacodon septentrionalis
1400107 Hypoxylon cankers Hypoxylon spp. Stroma
1400147 oyster mushroom Pleurotus ostreatus
1400106 Hypoxylon cankers Hypoxylon spp. (on broken stem),
1400104 Nectria canker Nectria spp. "target canker" on aspen, Nicolet National Forest, Wisconsin.
1400037 northern tooth Climacodon septentrionalis On live sugar maple in Sylvania Wilderness, Upper Peninsula, Michigan.
1400031 milk-white toothed polypore Irpex lacteus
1400111 chestnut blight or canker Cryphonectria parasitica orange colored stroma of cryphonectria on main stem around base of dead branch.
1400145 oyster mushroom Pleurotus ostreatus
1400123 black knot Apiosporina morbosa Ottawa National Forest

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