Blue Stain in pine board. The coloration in wood is due to the pigment in the fungal hypae.
Synnemata produced by a blue stain fungus.
Perithecia produced by a blue stain fungus. Note bulbous base of each perithecium.
Red stain in box elder.
Green stain in aspen caused by Chlorociboria.
A greenish black stain in oak caused by iron-tannic staining.