Boletus auriporus Pk. Gold-pored Bolete Cap 3-7cm across, convex then flattened; dull yellow-brown to reddish or pinkish brown; dry but soon viscid, tacky when wet or when handled for any length of time, with innate fibrils. Tubes brilliant chrome yellow, unchanging. Pores 2-3 per mm; concolorous with tubes, unchanging. Stem 30-60 x 10-15mm, often swollen at center, spindle-shaped; pale yellow to pinkish brown, darker stains developing where handled; viscid when wet, smooth.
Flesh pale yellow, unchanging when cut. Odor none. Taste slightly acidic. Spores smooth, subellipsoid, 8-11 x 3.5-4.5µ. Deposit olive-brown. Pleurocystidia in tubes of remarkable size, 38-70(100) x 9-161., filled with golden sap. Habitat under mixed deciduous trees. Uncommon to rare. Found in eastern North America. Season July-August. Edible. Comment Easily confused with other bright pored boletes, such as Boletus illudens, but that species does not develop the noticeably sticky cap of this fungus, however wet it becomes.