Scientific name: Globifomes graveolens (Schw.) Murr.
Derivation of name: Globifomes means "Fomes with
globular or spherical fruiting bodies." Fomes means "tinder."
Graveolens means "strong smelling."
Synonymy: Polyporus graveolens (Schw.) Fries, Boletus
Common names: Sweet knot.
Occurrence on wood substrate: Saprobic and parasitic;
solitary or in groups on trunks and logs of deciduous trees,
especially oak (Quercus); July through October, overwinters.
Dimensions: Individual caps 1-2 cm wide; entire mass of
small, overlapping caps may be 5-20 cm wide.
Upper surface: Individual caps are yellow-brown when
young, aging dark brown to grayish-black when mature.
Pore surface: Gray at first, becoming brownish; pores 3-4
Comments: Some specimens have a sweet odor when cut.
Figure 1. Note the many, small, densely overlapping caps.
Photo © John Plischke III.
Figure 2. The entire mass of caps is attached to wood by a
solid, central core. Photo © Larry Grand.