Major Groups > Polypores > Spongipellis pachyodon


Spongipellis pachyodon

[ Basidiomycota > Polyporales > Cerrenaceae > "Spongipellis" . . . ]

by Michael Kuo

This polypore looks more like a toothed mushroom, since its "pores" are typically eroded and tooth-like. Its white to dull yellowish fruiting bodies can be found spreading across the trunks of oaks and other hardwoods, often developing clearly defined caps, but also frequently consisting more of a spreading "tooth surface" than cap. Spongipellis pachyodon causes a white heart rot in living trees throughout eastern North America.


Ecology: Parasitic on oaks and other hardwoods; causing a white heart rot; annual; growing gregariously or in shelving or fused clusters; summer and fall; widely distributed in eastern North America.

Fruiting Body: Variable: sometimes merely a spreading pore surface; sometimes with a folded-over edge of a cap; sometimes with poorly to well developed caps.

Cap: Up to about 5 cm across and 5 cm deep; planoconvex to flat; very finely velvety, becoming bald; white to dull yellowish; sometimes finely radially grooved.

Pore Surface: Creamy white to dull yellowish; not bruising appreciably; composed of flattened tooth-like spines and irregular, angular pores; spines to about 1 cm deep.

Stem: Absent.

Flesh: Whitish; soft above and tougher below.

Odor: Not distinctive.

Spore Print: Presumably white.

Microscopic Features: Spores 5-6.5 µ; smooth; globose; inamyloid; thick-walled. Cystidia absent. Hyphal system monomitic; clamp connections present.

REFERENCES: (Persoon, 1825) Kotlaba & Pouzar, 1965. (Saccardo, 1888; Gilbertson & Ryvarden, 1987; Phillips, 1991/2005; Lincoff, 1992; Binion et al., 2008.)

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Spongipellis pachyodon

Spongipellis pachyodon

Spongipellis pachyodon

Spongipellis pachyodon

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Kuo, M. (2010, March). Spongipellis pachyodon. Retrieved from the MushroomExpert.Com Web site: