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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."
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Image Subject Name Scientific Name Description
5254077 velvet foot Flammulina velutipes Sporocarps of Flammulina velutipes, the velvet-foot fungus.
1241665 Armillaria root rot Armillaria solidipes This young western white pine has been killed by Armillaria root disease which was probably harbored by the adjacent stump.
1241670 Armillaria root rot Armillaria solidipes Cutting away the bark reveals white fan-shaped felts of Armillaria mycelium in the cambium at the root collar.
1241673 Armillaria root rot Armillaria solidipes Even seedlings have mycellium fans in the root or root collar cambium.
1241668 Armillaria root rot Armillaria solidipes Fresh and older (bark) resinosus at the base of an infected Douglas-fir.
5035076 Armillaria root rots Armillaria spp. Block of resin from base of tree infected by Armillaria
5042076 Armillaria root rots Armillaria spp. signs of armillaria visible in recent crack
5043046 Armillaria root rots Armillaria spp. Windthrow caused by Armillaria root rot in a large bur oak on a golf course.
5251043 Amanita mushroom Amanita spp. young sporocarp
5032080 Armillaria root rots Armillaria spp.
5031005 oyster mushroom Pleurotus spp.
5028090 Coprinellus fungi Coprinellus radians orange mycelial mat called the ozonium
5032079 Armillaria root rots Armillaria spp.
5037074 Armillaria root rots Armillaria spp. Armillaria mycelial mat
5037073 Armillaria root rots Armillaria spp. Armillaria mycelial mat
5031006 oyster mushroom Pleurotus ostreatus
5031079 wood decay Schizophyllum commune
5031076 wood decay Schizophyllum commune
5031077 wood decay Schizophyllum commune
5031078 wood decay Schizophyllum commune
5031080 wood decay Schizophyllum commune
5031081 wood decay Schizophyllum commune
5031082 wood decay Schizophyllum commune
5031083 wood decay Schizophyllum commune
5045093 yellow cap fungi Pholiota spp.
5045094 scaly pholiota Pholiota squarrosa
5044017 bird's nest fungi Cyathus striatus
5033052 Shaggy mane Coprinus comatus
5033057 Shaggy mane Coprinus comatus
5043100 inky cap Coprinus quadrifidus
5042071 destroying angel Amanita virosa
1241671 Armillaria root rot Armillaria solidipes Mycelium fans of Armillaria are thick and leathery. The cambium often develops fan-shaped ridges which are discernible long after the fungus has died.
1241672 Armillaria root rot Armillaria solidipes Mushrooms of Armillaria can be produced in abundance, but are not reliably present.

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