Observation 134856: Pluteus Fr.

Massive fruiting on Acer macrophyllum. Same as Obs. 134759.

Scales on cap small, appressed. Stipe: stout, becoming larger towards the base, white or off-white. Annulus: none.


Fruiting from across the street.
Fruiting from middle of street.
Fruiting from curb.
Fruiting from fence with telephoto lens.
Close-up of caps 6 inches across the top, taken from fence with telephoto lens.
Close-up of cap with appressed fibrils near cap center.
Gills free, honey-brown tinted, close but not crowded.
Another close-up of gills.
Honey-brown cap, fibrils on cap appressed, obscurred somewhat by recent rains.
Cap flesh and stipe mostly white. No annulus.
Massive spore print. Print extends upward 2mm from paper.
Spore print colors as dried range from light buff to nearly black, as seen here. Moisture content of spores makes considerable difference in color.

Proposed Names

69% (5)
Recognized by sight
49% (4)
Recognized by sight
57% (1)
Used references: Arora, Mushrooms Demystified, p. 256, under P. cervinus. Stipe 3 cm diameter.

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Daniel B. Wheeler (Tuberale)
2013-05-31 18:21:05 PDT (-0700)

Sorry, all.

Took spore print. Spores massive, defining space between gills. Spores accumulating to 2mm depth. Splotchiness on gills are actually thin layers of spores. In mass and dried, spores are buff to coffee au lait to light brown. No hint of red in massed spores. I’m guessing this may be Pluteus magnus, but need confirmation. Anyone want to scope this out? I’ve got several million spores in the spore print.

By: Richard Kneal (bloodworm)
2013-05-29 14:57:04 PDT (-0700)

all u have to do is look at this gill attachment to know this is not Armillaria…

Look at the last pictures
By: Christian (Christian Schwarz)
2013-05-29 14:24:51 PDT (-0700)

Pink spore blushes (unlike in Armillaria) on the gills (which are free, unlike in Armillaria).

The stipe is pure white and stout even in age, unlike those of A. tabescens which have tapered and upwards-darkening stipes in age:

Also, there’s really no true fibrils or scales on these caps. Just cracking of the pileipellis, which is a cutis.

Last but not least, look at the map below. A first record for any pacific state in North America really begs for better evidence:

Original Acer macrophyllum
By: Daniel B. Wheeler (Tuberale)
2013-05-29 13:01:15 PDT (-0700)

was about 5 feet across.

Created: 2013-05-29 12:00:53 PDT (-0700)
Last modified: 2013-06-02 19:47:45 PDT (-0700)
Viewed: 132 times, last viewed: 2017-06-15 22:30:05 PDT (-0700)
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