This is one of those "you had better be right" kind of mushrooms because there are similar looking mushrooms that are poisonous. The red stain when cut was listed in the book.

Camera:	Nikon D2x
Date:	Sunday, September 20th, 2009 at 4:35 PM
Exposure:	1/25 sec at f2.8
ISO:	800 asa
Lens:	17-55mm f/2.8G ID ED DX AF-S Zoom-Nikkor at 52mm (equivalent field of view of a 78mm lens on a 35mm camera)
Scientific Name:	species related to Agaricus campestris (Field mushroom, Meadow mushroom)
Tag:	mushroom
Larger image:	2000 x 1328
Raw image:	4288 x 2848