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    Conifer (9)
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Joseph O'Brien's Images

Title: Plant Pathologist
Organization: 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.
Remove Filters: Cones(X)
10 Images of 6 Subjects View Subject List View Image Descriptions View Thumbnails
10 Images    

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1397021
1397021
jack pine
Pinus banksiana
Cones
Joseph O'Brien

5031004
5031004
red pine
Pinus resinosa
Cones
Joseph O'Brien

5030029
5030029
tamarack
Larix laricina
Cones
Joseph O'Brien

5042055
5042055
white spruce
Picea glauca
Cones
Joseph O'Brien

5054080
5054080
jack pine
Pinus banksiana
Cones
Joseph O'Brien

5034054
5034054
jack pine
Pinus banksiana
Cones
Joseph O'Brien

5034055
5034055
jack pine
Pinus banksiana
Cones
Joseph O'Brien

5034056
5034056
jack pine
Pinus banksiana
Cones
Joseph O'Brien

1397014
1397014
Douglas-fir
Pseudotsuga menziesii
Cones
Joseph O'Brien

1397019
1397019
eastern arborvitae
Thuja occidentalis
Cones
Joseph O'Brien

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