Conservation Status: Not of concern
Agaricus moelleri, usually known as A. praeclaresquamosus Freeman, is another phenol-smelling, toxic species and is the most common of this group in the PNW. It is a medium to medium-large species with a marshmallow-shaped cap and pallid gills when young, dark gray-brown fibrillose cap, smooth stipe, and well developed ring. It lacks the pinkish tints and markedly solid flesh of A. hondensis, and the flesh in the extreme base of the stipe stains a brighter yellow when cut or crushed. It is a fairly common mushroom in the PNW and southward into California, however the status of its name is in question, making it difficult to assess its overall distribution. Recent studies suggest that the names A. moelleri, A. praeclaresquamosus, and A. meleagris all refer to the same taxon, which differs from A. placomyces, a similar species common in eastern North America. Limited analyses suggest that Pacific Coast material does not exactly fit any of these names and that more than one new species could be present here.