Summary:
Features include flat growth on hardwood, a perennial yellowish brown to grayish brown pore surface that is woody and not readily separable, small circular pores, and microscopic characters including dextrinoid spores.

Odor:
none in particular (Lincoff)

Taste:
none in particular (Lincoff)

Microscopic:
spores 6.5-8.5 x 5.5-7.0 microns, nearly round to broadly elliptic, some dextrinoid, walls colorless, slightly thickened; cystidioles about 26 x 6 microns, "clavate with an attenuated finger-like apex"; generative hyphae 2.5-5.0 microns wide, walls colorless, thin to moderately thick, skeletal hyphae 2.5-5.0 microns wide, "walls dark brown, thin to thick", (Ginns), spores 6.5-8.5 x 5.5-7 microns, broadly oval to nearly round, smooth, dextrinoid, colorless; basidia 4-spored, 11-12.5 x 7-8.5 microns, broadly clavate, simple-septate at base; setae absent; thin-walled ventricose cystidioid elements present; hyphae of context of 2 types, mostly the first: 1) 2.5-5 microns wide, dark brown in KOH, thin-walled to thick-walled, rarely branched, occasionally septate, 2) almost colorless, thinner-walled; hyphae of trama similar, (Gilbertson), spores 7-8(9) x 6-7.5 microns, elliptic to nearly round, smooth, dextrinoid, some thick-walled, with droplets or granular contents; setae absent, (Breitenbach)

Spore Deposit:
white (Buczacki)

Notes:
Gilbertson listed Fomitiporia punctata from 44 states and provinces in North America, including British Columbia, Washington, Oregon and Idaho, but described it as fruiting on hardwoods and conifers. Ginns(28) says that reports on conifers have been has been segregated under Fomitiporia tsugina, so that the range is uncertain but says that Fomitiporia punctata has occurred on the hardwood ornamental Juglans sieboldiana in BC.

EDIBILITY

no (Lincoff)

Synonyms and Alternate Names:
Sarcosoma latahense Paden & Tylutki