This large, dull olive-brown agaric, is typically slimy or sticky and exudes white milk. It grows solitary or in scattered groups on soil in damp places under birch.
margin at first involute with a somewhat depressed centre. The upper surface is olive brown or yellow-green and is often sticky or slimy in the middle. When young it has velvety zones and may be shaggy at the rim. Later it becomes funnel-shaped and the colour darkens to blackish. Gills
dirty white, stained olive-brown by old milk. Initially white. They are fairly narrow, crowed and extending downward. Stem
similar in colour as the cap, but much lighter.
on the www.first-nature.com web site.