Stropharias, or winecaps, grow gregariously on wood chips and are a tasty edible (potatoes), when in the early button stage.  Fresh specimens have a burgundy cap (that fades in the sun and with age), a ‘cog-wheel’ ring and white rhizomorphs at the base of the mushroom.  It has a purple-black spore-print.  David Aurora has speculated that this may be an alien species, a weed.  In any case, it has become ubiquitous with the increased use of wood chips to suppress the growth of weeds.  After the morel, it is among the first edible species to become visible in spring (and fall) urban and suburban gardens. 016-001