page_title: Agaricus hondensis
section_title: Description
hierarchical_section_title: Agaricus hondensis / Description
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context_page_description: 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. Found in the Pacific Northwest region of North America, A. hondensis fruits in the fall under conifers or in mixed forests.
  The fungus produces fruit bodies with white to gray-brown caps up to 15 cm 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 is poisonous, and causes severe gastrointestinal upset if consumed. It has an unpleasant odor similar to phenol or creosote, and develops a soapy-metallic taste when cooked. Agaricus hondensis can be distinguished from similar Agaricus species by differences in geographic range, habitat, staining reaction, and odor.
context_section_description: The cap is initially convex before flattening out, and reaches a diameter of 6–15 cm (2.4–5.9 in). The dry and smooth cap surface is whitish or has pale pinkish-brown to pinkish-gray to fawn-colored flattened fibrils or fine fibrillose scales (at least in the center). In maturity, the fibrils usually darken to brown, reddish-brown, or reddish-gray, but in one northern form the fibrils are darker brown from the beginning. The flesh is thick and white. When bruised or injured, the flesh either does not change color, or may stain pale yellowish, then often slowly discolors pinkish. The odor of the crushed flesh is mild or faintly phenolic, but is usually distinctly phenolic in the base of the stipe.
  The gills are initially pale pinkish to pinkish-gray before becoming brown, then chocolate-brown or darker when the spores mature. In maturity, the gills are free from attachment to the stipe, and are packed close together with little intervening spaced between them. The stipe is 7–20 cm (2.8–7.9 in) long, and 1–2.5 cm (0.4–1.0 in) thick but with a thicker or bulbous base. Firm, smooth, and lacking the scales found on the cap, the stipe is white but discolors dingy pinkish or brownish in age or after handling. The flesh in the extreme base usually stains pale yellowish when bruised. The partial veil is membranous, white, and forms a thick, felt-like ring on the upper portion of the stipe. The ring is skirtlike but often flares outward instead of collapsing against the stipe. A drop of dilute potassium hydroxide placed on the cap turns yellow.
  Spore prints are purplish brown to chocolate brown. The smooth, thick-walled spores are broadly ellipsoidal, and typically measure 5.8–7.3 by 3.7–4.4 μm. The basidia (spore-bearing cells) are four-spored, club-shaped, hyaline (translucent, and measure 20–21.3 by 5.8–7.0 μm. Cystidia on the gill edge (cheilocystidia) are sac-shaped to club-shaped, hyaline to pale yellowish brown in color, and have dimensions of 18.3–25.6 by 7.3–11.0 μm; there are no cystidia on the gill face (pleurocystidia).
caption: Agaricus hondensis spores (1000x)
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