Suillus ponderosus  — Heavy Bolete — Suillaceae

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Medium to large (sometimes very large) mushroom. Convex cap maturing to planar or slightly depressed, reddish-brown to dull yellow, viscid to slimy. Pores yellow when young, discoloring but not turning blue when bruised, large, tubes similar in color. Stalk thick, equal, or tapered at either end, sometimes nearly pointed at base, yellow above ring, occasionally netlike, fibrils and mottled below, staining brownish. Veil viscid, yellow to orange. Mycorrhizal.
 
Habitat: Scattered to gregarious, terrestrial, conifers, often Douglas-fir.

Scent: Pungent

Spores: Brown to dull-cinnamon

Season: Autumn

Thick stalk on young and old
Robin Hill Park

Yellow pores
Robin Hill Park

Convex cap flattening with age
Robin Hill Park