Russula xerampelina, also known as Crab Russula, is a medium to large agaric that has a hard-fleshed cap whose color varies but is often dark red or purple. Mature plants have a fishy odor. All parts slowly stain dingy yellow-brown when cut or bruised.
convex, becoming later flat, with a broad, shallow depression. Surface sticky when moist, but soon dry; smooth - not streaked or warty. Color most often dark red, but may be dark purple, pink, green or brown, often with traces of yellow. Gills broad, close to subdistant, adnate, yellowish white. Stem
solid at first, later spongy. Surface white or flushed with pink; dry, smooth to wrinkled.
on the first-nature.com Web site.
on the MushroomExpert.Com Web site.