Major Groups > Jelly Fungi > Femsjonia peziziformis


Femsjonia peziziformis

[ Basidiomycota > Dacrymycetales > Dacrymycetaceae > Femsjonia ... ]

by Michael Kuo

On casual inspection Femsjonia peziziformis looks like any number of small, blob-ish, yellow jelly fungi. However, "casual inspection" is not even in your repertoire, is it, Captain Jelly Fungus? It's not likely that you, Supreme Cataloguer of Minutiae, will miss the flattened upper surface and the finely fuzzy, whitish sides. "This is no ordinary blob," you will proclaim. And then, to the amazement of all, you will produce your Captain's Microscope to demonstrate, wait for it, clamp connections, Y-shaped basidia, and septate spores!


We are not worthy. We merely bask in the aura of your jelliness.

Femsjonia luteoalba and Ditiola peziziformis are synonyms.


Ecology: Saprobic; growing scattered to gregariously on the wood of hardwoods; found year-round; originally described from France; widely distributed in Europe; in North America distributed from roughly the Great Plains eastward. The illustrated and described collections are from Illinois.

Fruiting Body: 3–8 mm across; 2–5 mm high; top-shaped to cushion shaped; upper surface flattened, yellow to brownish yellow, bald, shiny, and moist when fresh; undersurface (the sides) finely fuzzy, whitish to pale yellow; flesh yellow and gelatinous.

Odor: Not distinctive.

Microscopic Features: Spores 15–22 x 5–10 µm; allantoid; smooth; hyaline in KOH, with many oil droplets; becoming septate with 7 or more septa; developing digitate projections with germination. Probasidia 75–100 x 5–7.5 µm; cylindric to clavate; clamped at the base; hyaline or with golden yellow, globular contents. Basidia Y-shaped. Contextual hyphae of two types: 2–3 µm wide, thin-walled, smooth, hyaline in KOH—or 3–6 µm wide, with thicker (0.5–1 µm) walls, smooth. Clamp connections present.

REFERENCES: (J. -H. Léveillé, 1848) P. Karsten, 1876. (Brasfield, 1938; Overholts, 1940; Martin, 1952; Olive, 1953; Kennedy, 1958; McNabb, 1965; Reid, 1974; Breitenbach & Kränzlin , 1986; Shirouzu et al., 2009; Buczacki et al., 2012; Shirouzu et al., 2017; Læssøe & Petersen, 2019; Zamora & Ekman, 2020.) Herb. Kuo 07151401, 08022002.

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Femsjonia peziziformis

Femsjonia peziziformis

Femsjonia peziziformis

Femsjonia peziziformis

Femsjonia peziziformis

Femsjonia peziziformis

Femsjonia peziziformis

Femsjonia peziziformis
Clamp connection, basidium

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Kuo, M. (2021, April). Femsjonia peziziformis. Retrieved from the MushroomExpert.Com Web site: