Green Stain Mushroom Chlorociboria aeruginascens/aeruginosa (Nylander) Kanouse / (Oeder) Seaver  Synonyms: Blue Stain, Green Elfcup.

Status:

Fruiting body: Infertile (outer) surface blue-green; fertile (inner) surface blue-green (sometimes yellow-green); smooth; saucer to cup-shaped. Stalk: Blue-green, often off-center. Spores must be examined to distinguish C. aeruginascens from nearly identical C. aeruginosa (not yet confirmed for the project) and the two species are treated together here.

Relationships:

Found in groups or clusters on hardwood logs, mostly oaks; often stain wood substrate blue-green. (J. Solem, pers. comm.)

There are 34 records in the project database.

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Green Stain Mushroom (fruting bodies) in Howard Co., Maryland (10/3/2011). Spores were not examined. Photo by Robert Solem. (MBP list)

Green Stain Mushroom in Howard Co., Maryland (5/14/2018). Determined by Jo Solem. Photo by Sue Muller. (MBP list)

Green Stain Mushroom in Garrett Co., Maryland (8/17/2017). Photo by Boyer and McDowell. (MBP list)

Green Stain Mushroom in Howard Co., Maryland (6/10/2015). Spores were not examined. Photo by Bonnie Ott. (MBP list)

Green Stain Mushroom (fruiting bodies) in Howard Co., Maryland (11/11/2015). Photo by Joanne Solem. (MBP list)

Green Stain Mushroom in Howard Co., Maryland (10/20/2018). Determined by Jo and Bob Solem. Photo by Sue Muller. (MBP list)

Green Stain Mushroom in Frederick Co., Maryland (4/26/2019). Photo by Sue Muller. (MBP list)

Green Stain Mushroom (on wood with a few fruiting bodies - form in which this fungus is most often observed) in Howard Co., Maryland (11/11/2015). Photo by Joanne Solem. (MBP list)

Green Stain Mushroom in Garrett Co., Maryland (7/13/2019). Determined by Jo Solem. Photo by Sue Muller. (MBP list)

Green Stain Mushroom in Montgomery Co., Maryland (3/6/2019). Determined by Jo Solem. Photo by Anne Looker. (MBP list)

Green Stain Mushroom in Frederick Co., Maryland (7/2001). Spores were not examined. Photo by Bob Cammarata. (MBP list)

Green Stain Mushroom growing in Montgomery Co., Maryland (3/26/2019). Determined by Jo Solem. Photo by Anne Looker. (MBP list)

Green Stain Mushroom in Prince George's Co., Maryland (12/9/2018). Photo by Anne Looker. (MBP list)

Green Stain Mushroom spores collected in Howard Co., Maryland (11/11/2015). Irregularly fusiform w/ 2 oil drops, smooth, hyaline; measured 6.5-10.0 X 1.2-2.0 microns. Photo by Robert Solem. (MBP list)

Green Stain Mushroom in Montgomery Co., Maryland (12/5/2018). Photo by Anne Looker. (MBP list)

Green Stain Mushroom in Howard Co., Maryland (1/23/2019). Photo by Sue Muller. (MBP list)


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