|Major Groups > Gilled Mushrooms > Pale-Spored > Omphalinoid > Xeromphalina kauffmanii|
by Michael Kuo
This tiny mushroom often fruits in stunning numbers on stumps and dead logs in hardwood forests. It has a white spore print, gills that run down the stem, and a wiry stem that is yellow above, and brownish below. On close inspection, the gills are often connected by many cross-veins—one of the defining features of the genus Xeromphalina.
The very similar Xeromphalina campanella appears on the wood of conifers and has slightly wider spores.
Ecology: Saprobic on the deadwood of hardwoods; growing in dense clusters (sometimes by the hundreds!) on stumps and logs, or occasionally growing in small clusters or even alone; spring through fall; widely distributed east of the Rocky Mountains. The illustrated and described collections are from Illinois, Arkansas, Michigan, and Québec.
Cap: 0.5–2 cm across; convex to broadly convex or flat overall, developing a deep central depression; bald; becoming lined or pleated, especially toward the margin; brownish yellow to brownish orange or orangish brown; paler towards the margin; fading.
Gills: Running down the stem; close or nearly distant; with many cross-veins; pale yellow; short-gills frequent.
Stem: 1–2.5 cm long; 1–2 mm thick; more or less equal, or tapered to the base; rusty yellow above, darker brown below; bald, or sometimes with orange basal mycelium; wiry.
Flesh: Insubstantial; yellowish.
Odor and Taste: Not distinctive.
Chemical Reactions: KOH bright red on cap surface.
Spore Print: White.
Microscopic Features: Spores 3–6 x 2–3 µm; ellipsoid; smooth; weakly to moderately amyloid. Pleuro- and cheilocystidia fusiform to narrowly clavate; up to about 30 x 10 µm. Caulocystidia clavate to fusiform; thin-walled. Pileipellis a cutis; elements 3–15 µm wide, encrusted, orangish, clamped at septa.
REFERENCES: A. H. Smith, 1953. (Miller, 1968; Smith, Smith & Weber, 1979; Arora, 1986; Bessette, Miller, Bessette & Miller, 1995; Halling & Mueller, 2005; McNeil, 2006.) Herb. Kuo 05169507, 05299502, 08270204, 10251307.
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Cite this page as:
Kuo, M. (2016, June). Xeromphalina kauffmanii. Retrieved from the MushroomExpert.Com Web site: http://www.mushroomexpert.com/xeromphalina_kauffmanii.html