Globifomes graveolens

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Ecology: Saprobic and possibly parasitic; appearing on deadwood and from the wounds of living hardwoods (primarily oaks); causing a white rot; annual, or perennial for a few years; summer and fall—or year-round in warmer climates; originally described from Georgia; widely distributed in North America east of the Rocky Mountains. The illustrated and described collection is from Ohio.

Fruiting Body: 10-23 cm high; 8-16 cm across; 6-10 cm deep; a mass of tightly packed, overlapping individual caps arising from a central core.

Individual caps: 1-5 cm across; semicircular to fan-shaped; planoconvex to flat; often drooping; bald or finely fuzzy; dry; with vague concentric zones of color; reddish brown to brown, becoming dull brownish gray with age.

Pore Surface: Grayish, becoming brownish to brown; not bruising; pores round and small (2-4 per mm), with thick dissepiments; tubes 2-4 mm deep.

Flesh: Granular in the central core; tough and fibrous in the caps; pale to dark brown; unchanging when sliced.

Odor: Not distinctive.

Chemical Reactions: KOH slowly black on flesh of dried specimens.

Microscopic Features: Spores not found; reported (Gilbertson & Ryvarden 1987) as 10-14 x 3-4 m; cylindric; smooth; hyaline in KOH; inamyloid. Basidia 4-sterigmate. Hymenial cystidia not found. Setae not found. Hyphal system trimitic: generative hyphae 3-5 m wide, smooth, thin-walled, hyaline in KOH, with clamp connections; skeletal hyphae 4-6.5 m wide, smooth, thick-walled, brown in KOH; binding hyphae 5-10 wide, very thick-walled, aseptate. Sclerids abundant in granular core context; thick-walled; reddish brown in KOH.

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