Images taken in United States
| 5 Images of 4 Subjects | View Subject List | View Image Details | View Thumbnails |
| Image | Subject Name | Scientific Name | Description |
|---|---|---|---|
| 1473123 | fir and spruce canker | spruce cankers- branch stubs | |
| 1473169 | human caused injury | Campground in aspen stand sustaining damage from campers carving, axing, and otherwise injuring the bark; photo taken 8/1973. | |
| 1473178 | human caused injury | bark injury in campground; photo taken 7/1974 | |
| 1473181 | sunscald | sunscald follows after stand opened and accelerates breakup; photo taken 9/1974 | |
| 1473045 | frost and winter injury (general) | frost crack (external) |
