Mushroom ID help — dog may have ingested a small piece
Found growing on the ground in a wooded/forest area in pelham bay park New York, next to exposed tree roots.
Mushroom was white to cream colored throughout. Underside had closely spaced white/cream gills. Stem was long, slender and white/cream, with a somewhat fibrous/scaly texture. I unfortunately don’t have a good photo of the intact cap because it broke apart. The stem/base is still in the ground in the attached photos.
My dog grabbed the mushroom and I immediately removed most/all of it from her mouth, but she may have swallowed a small amount. This happened about 2 hours ago and she currently has no symptoms.
Looking for help identifying the mushroom, particularly whether it could be a toxic species. Photos show the gills, broken cap and remaining stem/base.