Agaricus hondensis

Agaricus hondensis, commonly known as the felt-ringed agaricus, is a species of fungus in the family Agaricaceae. The species was officially described in 1912 by mycologist William Alphonso Murrill, along with three other Agaricus species that have since been placed in synonymy with A. hondensis.

The fungus produces fruit bodies (mushrooms) with white to gray-brown caps up to 15 cm (6 in) in diameter covered with pale pinkish-brown scales that darken in age. The tightly-packed gills on the cap underside are initially white before becoming pinkish, lilac-gray, and finally brownish as the spores mature. The stout stipe is bulbous and has a thick, white, felt-like ring. The mushroom has an unpleasant odor similar to phenol or creosote, and develops a soapy-metallic taste when cooked. It can be distinguished from similar Agaricus species by differences in geographic range, habitat, staining reaction, and odor.

Found in the Pacific Northwest region of North America, A. hondensis fruits in the fall under conifers or in mixed forests. The mushroom is poisonous, causing severe gastrointestinal upset if consumed.