These gorgeous, blue-green cup fungi fruit infrequently, and I was lucky to find them in such good shape! They have a cup-shaped fruiting body with a tiny, central stem. The fruiting body becomes flattened with age. They ranged in size from 2-4 mm wide.
Chlorociboria species contain a quinone pigment called xylindein, which is the reason for the characteristic bluish-green stain that occurs on wood that's infected by this species.
Chlorociboria aeruginosa is often confused with Chlorociboria aeruginascens. But, Chlorociboria aeruginosa tends to be a little smaller and have a centrally attached stipe rather than a laterally attached stipe.
Chlorciboria aeruginosa is one of just two species recorded in the genus Chlorociboria, the other being Chlorociboria aeruginascens. Both result in green staining of timber. Although C. aeruginosa tends to be a little smaller and very much rarer than C. aeruginascens, the fruitbodies of the two species cannot be confidently differentiated on macroscopic characteristics, but at 5-7 x 1-2µm the spores of Chlorciboria aeruginascens are significantly smaller than those of Chlorciboria aeruginosa (9-14.. more