Questionable Stropharia

Description:

The cap is 3 to 15 centimeters broad, obtuse to convex, becomes plain or uplifted in age, has a smooth surface, is slimy when moist, and yellowish. The flesh is white, thick, and soft. The gills are pale gray and gradually darkens to purplish-gray or purplish-black. The gills occasionally pull away from the stipe with age. The stipe is 6 to 18 centimeters long and is stuffed or hollow. The veil is soft and white. The spore print is dark purplish to nearly black. The species fruits in the spring and fall. The species doesn't have a volva.

Habitat:

S. ambigua appears in late fall as a solitary to scattered mushroom or in groups on rich humus, usually under conifers. It can also be found with alder and other hardwoods in the Pacific Coast. It has frequently been found in disturbed areas, such as where wood was handled. The species invade outdoor mushroom beds after wood chips have decomposed by a primary saprotroph. It favors a cold and damp environment.