Joseph O'Brien's Images
Title: Plant PathologistOrganization: USDA Forest Service
Unit: Forest Health Protection
Country: United States
Joe is a plant pathologist with the U.S. Forest Service in St. Paul, Minnesota. in addition to photography, his major interests include tree diseases in forests, woodlands and urban areas, hazard tree identification and mitigation, and mycology. Joe is a graduate of the University of Michigan (B.S. Forestry and M.S. Forest Pathology) and the University of Minnesota (Ph.D. Plant Pathology), and currently works at the Northern Research Station on the University of Minnesota's St. Paul campus. |
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Poor Architecture(X)
| 49 Images of 11 Subjects | View Subject List | View Image Details | View Thumbnails |
| Image | Subject Name | Scientific Name | Description |
|---|---|---|---|
| 5252010 | topping | Cracks and epicormic branches formed after a tree was topped. | |
| 5052075 | included bark | Tree with large codominant branch failure | |
| 5052078 | poor architecture | Maple with numerous accumulated defects. An "ugly" tree. | |
| 5052081 | topping | A topped tree with numerous epicormic branches produced on decaying stubs. | |
| 5053028 | poor architecture | House with large trees in yard. Multiple large branches arising from a single point (poor architecture). | |
| 5053037 | risk tree | Multiple defects (cracks, decay, poor branch angles) in a yard tree. | |
| 5298031 | poor architecture | "Ugly tree" syndrome from multiple defects and decay. | |
| 5298040 | poor architecture | Poor tree architecture caused by accumulated defects, including decay and broken branches. | |
| 5048033 | included bark | ||
| 5048035 | included bark | Codominant branch/stem failure caused by upright branching and included bark. | |
| 5048039 | included bark | Major crack caused by upright, codominant branching and included bark. | |
| 5048042 | included bark | Codominant branch failure and bark ripping caused by included bark. | |
| 5048043 | included bark | Major branch failure caused by codominant branching with included bark, and decay. | |
| 5048044 | included bark | Crown collapse caused by codominant branches with included bark. Failure occurred during a major windstorm. | |
| 5048045 | storm damage (general) | Branch breakage caused by high winds, in a tree with upright branching and included bark. | |
| 5048046 | included bark | Codominant branch failure with included bark and decay. | |
| 5048047 | poor architecture | Branch failure caused by included bark and decay. | |
| 5048048 | included bark | Included bark failure in a box elder. | |
| 5048049 | included bark | Codominant trunk failure caused by upright branching and included bark. | |
| 5048050 | included bark | Major tree failure caused by upright branching and included bark. | |
| 5042080 | poor architecture | Poor tree architecture caused by improper pruning and storm damage. | |
| 5048059 | poor architecture | Basswood with poor tree architecture arising from lack of maintenance. | |
| 5048060 | poor architecture | Poor architecture and decay arising from improper maintenance. | |
| 5048061 | included bark | Codominant branching and included bark. | |
| 5034048 | poor architecture | Example of a branch crook | |
| 5033002 | slime flux | Slime flux associated with bacterial wetwood in elm. Associated with a number of bacteria. | |
| 5032098 | mechanical | A green ash with mechanical damage (vehicle) and poor form resulting from decay and bad branch angles. | |
| 5033003 | slime flux | Slime flux associated with bacterial wetwood in American elm. Associatd with several species of bacteria. | |
| 5033062 | cracks or splits | A red maple with a crack resulting from a bad branch union. | |
| 5033093 | epicormic branch | Epicormic branches arising after pruning in green ash. | |
| 5033094 | epicormic branch | Epicormic branches arising after pruning on green ash. | |
| 5033095 | epicormic branch | Epicormic branches arising after pruning on green ash. | |
| 5053035 | storm damage (general) | Multiple branch failures in tree during wind storm. | |
| 5053033 | included bark | Crack starting at a codominant branch junction, with included bark. A very hazardous tree. | |
| 5252002 | included bark | Poor branching angle with included bark, causing a crack all the way to the ground. | |
| 5042081 | poor architecture | ||
| 5040062 | poor architecture | ||
| 5040063 | poor architecture | ||
| 5040064 | poor architecture | ||
| 5040065 | poor architecture | ||
| 5038025 | poor architecture | ||
| 5033004 | decay | This tree has severe decay and extremely poor architecture, and is a very high hazard. | |
| 5033038 | included bark | A hackberry with major codominant branches and included bark that failed in a windstorm. | |
| 5043015 | included bark | Major crown failure caused by codominant branches and included bark. | |
| 5048015 | poor architecture | Hackberry with failed branches caused by bad branch architecture. | |
| 5048016 | inrolled crack | Codominant branches with crack | |
| 1301011 | included bark | Hazard tree: Major crown failure from included bark during a storm in 1998. Included bark failure. | |
| 1397043 | poor architecture | poor architecture combined with decay | |
| 1397044 | poor architecture |
