Black-staining Polypore Meripilus sumstinei (Murrill) M.J. Larsen & Lombard    Synonyms: Meripilus giganteus (misapplied), Polyporus giganteus (misapplied).
Kingdom Fungi   >   Phylum Basidiomycota   >   Class Agaricomycetes   >   Order Polyporales   >   Family Meripilaceae   >   Genus Meripilus   

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 146 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 in Baltimore Co., Maryland (6/19/2019). (c) Vanessa Beauchamp, some rights reserved (CC BY-NC). Photo by Vanessa Beauchamp via iNaturalist. (MBP list)

Black-staining Polypore in Howard Co., Maryland (7/9/2018). Photo by Joanne 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 Worcester Co., Maryland (7/21/2015). (c) scottyastro, some rights reserved (CC BY-NC). Photo by scottyastro via iNaturalist. (MBP list)

Black-staining Polypore in Worcester Co., Maryland (7/21/2015). (c) scottyastro, some rights reserved (CC BY-NC). Photo by scottyastro via iNaturalist. (MBP list)

Black-staining Polypore in Baltimore Co., Maryland (8/15/2019). (c) grimma, some rights reserved (CC BY-NC). Photo by grimma via iNaturalist. (MBP list)

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

Black-staining Polypore in Charles Co., Maryland (7/6/2020). (c) Tim Emhoff, some rights reserved (CC BY-NC). Photo by Tim Emhoff via iNaturalist. (MBP list)

Black-staining Polypore in Prince George's Co., Maryland (9/20/2019). (c) R. DN., some rights reserved (CC BY). Photo by R. DN. via iNaturalist. (MBP list)

Black-staining Polypore in Montgomery Co., Maryland (8/23/2020). (c) ktanabe, some rights reserved (CC BY-NC). Photo by ktanabe via iNaturalist. (MBP list)

Black-staining Polypore in Montgomery Co., Maryland (8/23/2020). (c) ktanabe, some rights reserved (CC BY-NC). Photo by ktanabe via iNaturalist. (MBP list)

Black-staining Polypore in Anne Arundel Co., Maryland (8/4/2020). (c) Matthew Beziat, some rights reserved (CC BY-NC). Photo by Matthew Beziat. (MBP list)

Black-staining Polypore in Montgomery Co., Maryland (6/20/2020). (c) amycophile, some rights reserved (CC BY-NC). Photo by amycophile via iNaturalist. (MBP list)

Black-staining Polypore in Talbot Co., Maryland (7/15/2020). (c) cnmurray, some rights reserved (CC BY-NC). Photo by cnmurray via iNaturalist. (MBP list)

Black-staining Polypore in Howard Co., Maryland (6/12/2020). (c) dangitmimi, some rights reserved (CC BY-NC). Photo by dangitmimi via iNaturalist. (MBP list)

Black-staining Polypore in Howard Co., Maryland (6/12/2020). (c) dangitmimi, some rights reserved (CC BY-NC). Photo by dangitmimi via iNaturalist. (MBP list)

Black-staining Polypore in Howard Co., Maryland (6/12/2020). (c) dangitmimi, some rights reserved (CC BY-NC). Photo by dangitmimi via iNaturalist. (MBP list)

Black-staining Polypore in Prince George's Co., Maryland (8/3/2019). (c) William J. Davis, some rights reserved (CC BY-NC-ND). Photo by William J. Davis via iNaturalist. (MBP list)

Black-staining Polypore in Prince George's Co., Maryland (8/3/2019). (c) William J. Davis, some rights reserved (CC BY-NC-ND). Photo by William J. Davis via iNaturalist. (MBP list)

Black-staining Polypore in Prince George's Co., Maryland (6/20/2020). (c) Elizabeth MacDonald, some rights reserved (CC BY-NC). Photo by Elizabeth MacDonald via iNaturalist. (MBP list)

Black-staining Polypore in Montgomery Co., Maryland (Date obscured). (c) thierola, some rights reserved (CC BY-NC). Photo by thierola via iNaturalist. (MBP list)

Black-staining Polypore in Montgomery Co., Maryland (7/7/2020). (c) wildlymistaken, some rights reserved (CC BY-NC-SA). Photo by wildlymistaken via iNaturalist. (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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