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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: Sapindales(X) Aceraceae(X) United States(X) 4 Sizes Available(X)
6 Images of 4 Subjects View Subject List View Image Details View Thumbnails

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Image Subject Name Scientific Name Description
5036071 sugar maple Acer saccharum
5045050 maple Acer spp.
5035058 red maple Acer rubrum
5045071 Norway maple Acer platanoides
5045073 Norway maple Acer platanoides
5039026 maple Acer spp. backlit leaves

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