USDA Forest Service
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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." |
| 6 Images of 2 Subjects | View Subject List | View Image Details | View Thumbnails |
| Image | Subject Name | Scientific Name | Description |
|---|---|---|---|
| 5028016 | black knot | Apiosporina morbosa | Sporocarp of Apiosporina morbosa on black cherry stem. |
| 5028017 | black knot | Apiosporina morbosa | Sporocarps form on galls that often kill the twigs or stems distally from the infection. |
| 1241569 | Swiss needle cast | Phaeocryptopus gaeumannii | Close-up of pseudothecia on underside of needle. |
| 1241570 | Swiss needle cast | Phaeocryptopus gaeumannii | Micrograph of needle cross section with pseudothecia emerging from stomata on underside. |
| 2251043 | Swiss needle cast | Phaeocryptopus gaeumannii | close-up view of infected needle |
| 0590014 | black knot | Apiosporina morbosa | and gall on cherry |
