Xeromphalina kauffmanii

Xeromphalina kauffmanii is a species of agaric fungus in the family Mycenaceae. Found in North America, Costa Rica, and Japan, it was described as new to science in 1953. The type collection was made in Chelsea, Michigan, in June 1940. The specific epithet kauffmanii honors American mycologist Calvin Henry Kauffman.[1]

Xeromphalina kauffmanii
Scientific classification
Kingdom:
Fungi
Division:
Basidiomycota
Class:
Agaricomycetes
Order:
Agaricales
Family:
Mycenaceae
Genus:
Xeromphalina
Species:
X. kauffmanii
Binomial name
Xeromphalina kauffmanii
A.H.Sm. (1953)

Description

The cap of the fruit body is convex, sometimes with a central depression at maturity, and measures 4–15 mm (0.16–0.59 in). Its color is initially bright rusty orange, changing to bright orange to cinnamon in maturity. The narrow, light yellow to cream gills. The reddish stipe measures 1.7–3 cm (0.7–1.2 in) by 0.8–2 mm wide. It has yellowish fibrils surrounding its base, as well as white rhizomorphs attaching the base to the substrate. The mushroom has thin, cream-colored flesh with an indistinct odor and a taste that is initially mild before becoming slightly bitter.[2]

The spore print is white. Spores are elliptical, thin-walled, and amyloid, measuring 4.2–6 by 2.5–3.5 µm. The basidia (spore-bearing cells) are club-shaped, four-spored, and measure 21–25 by 4–5 µm.[2]

Similar species

Xeromphalina campanella is a lookalike species that grows on rotting conifer wood.[2]

Habitat and distribution

Xeromphalina kauffmanii fruits in dense groups or clusters on rotting hardwood logs and stumps. Fruiting occurs from summer to autumn in eastern North America. The fungus has also been recorded from Costa Rica and Japan.[2]

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References
  1. Smith AH. (1953). "New and rare agarics from the Douglas Lake region and Tahquamenon Falls State Park, Michigan, and an account of the North American species of Xeromphalina". Papers of the Michigan Academy of Sciences. 38: 53–87 (see p. 81).
  2. Bessette A, Miller OK Jr, Bessette AR, Miller HR (1995). Mushrooms of North America in Color: A Field Guide Companion to Seldom-Illustrated Fungi. Syracuse, New York: Syracuse University Press. pp. 94–5. ISBN 978-0-8156-2666-4.
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