Im calling them fungi cups.... they are all over our mulch beds. Before these seed cups they were little patches of mushrooms. What kind of fungi is this and will it die off in the winter never to return?
What you have there is an example of the extremely cool bird's nest fungi:
The mushrooms you mention are unrelated to this, but both are harmless and have simply arisen from spores (windborne or in the mulch). During their brief appearance, they extract nutrients from the mulch.