Description: English: Phytophthora ramorum-caused mortality in tan oak, Sonoma County, CA. Source: Transferred from
en.wikipedia to Commons by
User:Quadell using
CommonsHelper. Author: Jeffrey A. Mai Aerial Survey & Aviation Safety Manager, Forest Health Protection USDA Forest Service - FHTET 2150 Centre Ave., Bldg. A., Suite 331 Fort Collins, CO 80526-1891.