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Clitocybe subconnexa

[Basidiomycota > Agaricales > Tricholomataceae > Clitocybe...]

by Michael Kuo

Clitocybe subconnexa and its close relatives (see the next paragraph) are apparently widely distributed on our continent. The tendency to grow in tight clusters is an identifying feature, as is the white cap and stem, and the densely crowded gills, which are broadly attached to the stem or just begin to run down it. The spore print is pinkish, and the spores are finely warty—features that lead some mycologists to place this species in a separate genus as "Lepista subconnexa."

Clitocybe fasciculata differs only in its "rancid farinaceous" odor and "disagreeable" taste (Bigelow, 1982), and Clitocybe densifolia differs only in spore size (4–4.5 x 2.5–3.5 µm). These slight differences in features seem unlikely to predict actual genetic difference, in my humble opinion.

Thanks to Chris Darrah for collecting, documenting, and preserving Clitocybe subconnexa for study; his collection is deposited in The Herbarium of Michael Kuo.

Description:

Ecology: Saprobic; growing scattered or, more commonly, in clusters in leaf debris or conifer duff; appearing under hardwoods or conifers in diverse ecosystems; summer and fall—or over winter in warm climates; apparently widely distributed in North America. The illustrated and described collections are from Illinois, Kentucky, and Pennsylvania.

Cap: 3–9 cm; convex with an inrolled margin, becoming planoconvex or flat, with an even margin; bald or with a satiny whitish sheen; dry; soft; white to buff, sometimes developing watery spots with age; the margin sometimes becoming lined and ridged with maturity.

Gills: Broadly attached to the stem or beginning to run down it; crowded; buff.

Stem: 2–8 cm long; up to 1.5 cm thick; more or less equal; bald or with a satiny whitish sheen; buff to grayish or watery brownish where handled; basal mycelium white, often copious.

Flesh: Whitish; not changing when sliced; fairly brittle.

Odor and Taste: Odor fragrant or not distinctive. Taste mild or slightly bitterish.

Chemical Reactions: KOH on cap surface negative.

Spore Print: Pinkish (sometimes nearly white).

Microscopic Details: Spores 3–5.5 x 2–3.5 µm; ellipsoid; finely warted; hyaline in KOH; inamyloid. Basidia 4-sterigmate. Cystidia not found. Pileipellis a cutis of smooth, hyaline elements 2.5–5 µm wide. Clamp connections present.


REFERENCES: Murrill, 1915. (Saccardo, 1925; Smith, Smith & Weber, 1979; Bigelow, 1982; Gulden, 1983; Roody, 2003; Gregory, 2007; Kuo & Methven, 2014; Siegel & Schwarz, 2016.) Herb. Kuo 10010410, 09300505, 09150801, 10111801.


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Clitocybe subconnexa

Clitocybe subconnexa

Clitocybe subconnexa

Clitocybe subconnexa

Clitocybe subconnexa

Clitocybe subconnexaSpores



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Kuo, M. (2019, May). Clitocybe subconnexa. Retrieved from the MushroomExpert.Com Web site: http://www.mushroomexpert.com/clitocybe_subconnexa.html