It has no common name.
Found this morning, abundant, ringing the mound of aged mulberry wood chips in our front lawn. It smelled good, but when I went to cut it open, it was hard, and filled with black spores.
It took my only 5 minutes to find it in "Millers Mushrooms"
. It's one of the secotioid fungi, which seem to be a polyphyletic group related to our edible grocery store mushrooms.
This recent taxonomic treatment seems to be a major reclassification of this and similar species.
Phylogeny and taxonomy of Macrolepiota (Agaricaceae) -- Vellinga et al. 95 (3): 442 -- Mycologia.
