Boletus variipes

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Ecology: Mycorrhizal with hardwoods, especially oaks (occasionally reported, perhaps erroneously, with conifers); growing alone, scattered, or gregariously; late summer and fall; fairly widely distributed in eastern North America.

Cap: 6-20 cm; convex, becoming broadly convex or almost flat; dry; finely velvety at first; often becoming minutely cracked in age; tan to brownish or pale grayish brown.

Pore Surface: White when young, becoming yellowish or olive; not bruising; pores "stuffed" when young; 1-2 pores per mm at maturity; tubes 1-3 cm deep.

Stem: 8-15 cm long; 1-3.5 cm thick; swollen in the middle, more or less equal, or enlarging to base; dry; solid; whitish or grayish brown; usually fairly prominently reticulate with whitish or brownish reticulation--or at times only finely reticulate.

Flesh: White; not staining on exposure.

Odor and Taste: Not distinctive.

Chemical Reactions: Ammonia dark yellow with a purplish ring on cap surface; negative to grayish on flesh. KOH similar to ammonia on cap surface; grayish on flesh. Iron salts negative to pale olive on cap surface; gray to yellowish on flesh.

Spore Print: Olive brown.

Microscopic Features: Spores 9-16 (-18) x 4-6 ; smooth; subfusiform.

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