Duggstar Posted November 14, 2014 Report Posted November 14, 2014 Habitat:Ireland, roadside, at the base of a deciduous tree.Gills:Pale pinkish grey in the smaller specimen, less pink in the larger one.Stem:140mmlong, 30mm diameter, thick white ring that stains pink on handling,stem stains faintly yellowish pink shortly after handling as does thecap.Cap:120mm Diameter, silky, minutely scaly.Spore print color:In progressFlesh:Thick, white, turns very slightly pinkish a few minutes after cutting fading to yellowish.Smell:Faintly of almonds.
Dave W Posted November 14, 2014 Report Posted November 14, 2014 The one with the unexpanded cap (4th photo) looks like Agaricus, maybe one of the species in the A. arvensis group. But the one in the 1st few photos looks like Leucoagaricus. Spore prints will tell.
Duggstar Posted November 14, 2014 Author Report Posted November 14, 2014 The big one, which you thought might be Leucoagaricus printed dark vinaceous brown. The other one I didn't print but I assume it's the same species. I found them only inches apart and they have the same odour. I was thinking they might be Agaricus excellens, a rare Agaricus?
Dave W Posted November 15, 2014 Report Posted November 15, 2014 Dark vinaceous brown certainly eliminates Leucoagaricus from consideration. An interesting find, Duggstar. Like you say, probably Agaricus.
Duggstar Posted December 10, 2014 Author Report Posted December 10, 2014 Just an update you if you are interested - I sent a specimen to a local herbarium for analysis and they verified it as Agaricus macrocarpus.
Cedric Posted December 11, 2014 Report Posted December 11, 2014 Yup, probably Agaricus... Since you have posted this, you have probably observed the gills going from white to pink to black.
Dave W Posted December 11, 2014 Report Posted December 11, 2014 Some types of Agaricus have gills that go almost directly from pale/gray to brown without a pink stage. The third photo shows gills with color unusually close to white for an Agaricus. Duggstar, how would you describe the color of the gills in photo #3? Sometimes lighting can affect the apparent color in a photo. These are really interesting. Thanks for sharing.
Duggstar Posted December 12, 2014 Author Report Posted December 12, 2014 Dave, they were very pale pinkish grey, but they turned directly to brown as they dried. The herbarium I sent it to said the spores were too small for it to be A. urinascens var. excellens though "The spores on your specimen are too small to be those of Agaricusurinascens (=excellens). I make it Agaricus macrocarpus because of itsplain white colour without scaliness, lack of colour reaction (yellow,red) on cutting, large size and spore dimensions."
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