Agaricus
(Probably Agaricus sect. Xanthodermatei
name proposed by Alan Rockefeller on MO )

Two specimens:
a) One growing on the other side of the lake 11/18/15
b) One growing on trail in Mt. Park 11/27/15

Cap is white with scales
Gills are free
spore print is brown
Growing in suburban landscaped area

"Agaricus section Xanthodermatei comprises a group of species allied to
A. xanthodermus and generally characterized by basidiomata having phenolic odors,
transiently yellowing discolorations in some parts of the basidiome,
Schaeffer’s reaction negative, and mild to substantial toxicity."
(from http://www.mycologia.org/content/97/6/1292.full)

Click here to see list of species in Xanthodermatei

Note: The Agaricus genus has 42 species divided into five sections:

Click Here to See section names - that is, sections of Agaricus

Click Here for a discussion of section Xanthodermatei


Other names considered:
Agaricus arvensis (The horse mushroom) - not usually scaled, bruises yellow this does not bruise yellow

Agaricus crocodilinus - has forked gills - has scales on stem - this does not have

---- Scroll Down for some Pictures ---




This first set of pictures is from
those growing on other side of lake, found during a Wednesday walk on 11/18/15
scroll down for the second specimen





cap has scales





gills are free





there is a ring





there are
no scales on the stipe







The spore print is
dark brown



The following are pictures of
the second specimen found on Mt. Park 11/27/15




















The scales ar not as pronounced
as the first specimen







stains yellow



















the gills are free
and crowded





Cap edge is inrolled





Cap peels





stem hollow





Spore Print
dark brown











spores smooth

If you care to see more pictures of the first specimen
Click on a thumbnail to enlarge

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The following are from the second specimen


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