This usually small, orange-rusty brown bolete, with it's convex to flat cap and short, ringless stem, is notable for it's compound pores: the olive-green pore layer has an outer layer of coarse; angular pores and an inner layer of fine pores.
ochraceous or pinkish clay, more pallid at margin; convex or bun-shaped, smooth, sticky or viscid when damp. Flesh white with pinkish clay tinge, thick and soft. Pores
at first pallid olive or buff, becoming more ochraceous with age, angular, compound, unequal, large. Tubes grayish with vinaceous tinge, more or less decurrent. Spores
brownish olive. Stem
pallid yellowish sienna, more or less equal or tapering at base. Ring absent.
on the www.first-nature.com web site.