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A rooted shank of eastern hardwood forests, with a pale to grayish-brown cap, distant white gills, a tall white stem and a short taproot reaching buried wood. Older field guides lumped it into "Collybia/Oudemansiella/Xerula radicata". It is smaller than H. incognita and has very large, lemon-shaped spores.
Edible, but with little flesh (Wikipedia, as Xerula megalospora). Dig up the base to see the rooting taproot, which helps separate it from small brown, white-spored species, some of which are poisonous. Microscopy is needed to separate it from other rooted shanks such as H. incognita.
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Mycology is an evolving science: names, classifications and safety information change as research advances. Entries are compiled from cited sources and reviewed, but may be incomplete or out of date — check the sources, and never rely on this library alone to identify or eat a mushroom.
