Black-staining Polypore Meripilus sumstinei (Murrill) M.J. Larsen & Lombard  

Status:

Found on the ground at bases of hardwood trees and stumps, primarily oaks (J. Solem, pers. comm.). Mistakenly listed as M. giganteus (which does not occur in NA) in many field guides. Fruits throughout the season from spring into fall (L. Biechele, pers. comm.).

Description:

Fruiting body: Light yellowish-gray to gray-brown in age; fan/spoon-shaped; margin thin, wavy/lobed; stains black when fresh (instant or slowly); flesh white, fibrous; to 16" (41 cm) or more. Pores: White/creamy-white, stain black. Stalk: Ochre to red brown; stains black (J. Solem, pers. comm.).

There are 40 records in the project database.

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A fresh Black-staining Polypore in Howard Co., Maryland (8/4/2016). Photo by Richard Orr. (MBP list)

Black-staining Polypore in Montgomery Co., Maryland (6/29/2018). Determined by Bob and Jo Solem. Photo by Anne Looker. (MBP list)

Black-staining Polypore growing in Montgomery Co., Maryland (9/3/2018). Determined by Jo Solem. Photo by Anne Looker. (MBP list)

A Black-staining Polypore (fruiting body) in Howard Co., Maryland (7/5/2011). Photo by Robert Solem. (MBP list)

A Black-staining Polypore (older fruiting body, stained) in Howard Co., Maryland (7/5/2010). Photo by Robert Solem. (MBP list)

Black-staining Polypore growing in Montgomery Co., Maryland (7/13/2018). Determined by Bob and Jo Solem. Photo by Anne Looker. (MBP list)

Black-staining Polypore in Howard Co., Maryland (7/9/2018). Photo by Joanne Solem. (MBP list)

A Black-staining Polypore in Worcester Co., Maryland (10/17/2014). Photo by Lance Biechele. (MBP list)

Spores of Black-staining Polypore in Howard Co., Maryland (7/9/2018). Nearly round, smooth, hyaline. 4.7-5.5 X 4.2-4.6 microns. Photo by Robert Solem. (MBP list)


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