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Tubaria dispersa

by Michael Kuo, 24 April 2023

Full disclosure: before this webpage, there are apparently only two records of this species for North America, and they are very old (1897 and 1935). So I won't be offended if you think I'm nuts. But the collection featured here is a good match, morphologically, for the European species Tubaria dispersa. Crucial features include the small stature, the dull yellow young gills, the buff cap, and, under the microscope, the flask-shaped spores and cylindric to clavate cheilocystidia.

Tubaria autochthona is a synonym.


Ecology: Saprobic; growing gregariously from the sometimes-buried fruits and litter of hawthorns, serviceberries, or fruit trees in the Rosaceae; spring through fall; originally described from England (Berkeley & Broome 1801); widespread in Europe; North American range uncertain. The illustrated and described collection is from Illinois.

Cap: 1–2 cm across; convex at first, becoming broadly convex or nearly flat; dry; bald, or slightly felty to the touch; buff to dull brownish yellow or pale yellowish brown; the margin not lined.

Gills: Broadly attached to the stem; distant or nearly so; short-gills frequent; dull yellow, becoming darker with age.

Stem: 1–2 cm long and 1–2 mm thick; more or less equal; fibrillose to fibrillose-scaly with partial veil remnants near the apex; whitish to brownish; basal mycelium white.

Flesh: Brownish to whitish; insubstantial; unchanging when sliced.

Odor: Not distinctive.

Chemical Reactions: KOH on cap surface negative.

Spore Print: Yellowish brown.

Microscopic Features: Spores 6–8 x 3–4.5 µm; amygdaliform, with a tiny apiculus but without a pore; smooth; pale brown to dull yellowish in KOH; inamyloid; occasionally collapsing in both KOH and Melzer's mounts. Basidia 28–32 x 5–6 µm; clavate; 4-sterigmate. Cheilocystidia 30–60 x 4–7 µm; cylindric to clavate; smooth; thin-walled; hyaline in KOH. Pleurocystidia not found. Pileipellis a cutis; elements 5–15 µm wide, smooth or slightly brownish-encrusted, hyaline to brown in KOH. Clamp connections present.

REFERENCES: (M. J. Berkeley & C. E. Broome, 1801) R. Singer, 1961. (Kühner & Romagnesi, 1953; Phillips, 1981; Moser, 1983; Buczacki et al., 2013; Gminder & Böhning, 2017; Vesterholt, 2018; Læssøe & Petersen, 2019; Alcántara, 2023.) Herb. Kuo 08221401.

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Tubaria dispersa

Tubaria dispersa

Tubaria dispersa

Tubaria dispersa

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Kuo, M. (2023, April). Tubaria dispersa. Retrieved from the MushroomExpert.Com Web site: