Image Number: 1427062

Showing Hypoxylon thouarsianum, a sapwood decay fungus that is also commonly isolated from Sudden Oak Death - affected oak trees, although it is also found on trees not affected by SOD. The presence of the half-dome-shaped fruiting bodies are indicative of advanced stages of SOD. Newly formed fruiting bodies are olive greenish or shiny black and release powdery green spores upon contact. Older fruiting bodies are dull black.
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Image location:
United States


Kingdom: Chromista
Phylum: Oomycota
Class: Oomycetes
Order: Peronosporales
Family: Pythiaceae
Genus: Phytophthora
Subject: Phytophthora ramorum S. Werres, A.W.A.M. de Cock


Kingdom: Plantae
Phylum: Magnoliophyta
Class: Magnoliopsida
Subclass: Hamamelidae
Order: Fagales
Family: Fagaceae
Genus: Quercus
Subject: Quercus agrifolia Née
Node Affiliation:
Image uploaded:
Monday, January 1, 1990
Image last updated:
Wednesday, June 12, 2002