A slender, white-capped slippery jack that grows only with five-needled pines, in eastern North America with eastern white pine. The bald, sticky, white to yellowish-white cap and the pinkish to reddish-brown glandular dots on a ringless stem set it apart from other eastern Suillus.
Reportedly edible but of mediocre quality. As with other slippery jacks, the slimy cap skin is usually removed, and some people react to Suillus with digestive upset or skin irritation from handling. Confirm the white-pine association and ringless, dotted stem before eating.
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Habitat
Ectomycorrhizal with five-needled pines (Pinus subgenus Strobus); in North America apparently exclusively with eastern white pine (Pinus strobus). Alone, scattered or gregarious in summer and fall.
Distribution
Northeastern North America, west to the Dakotas and south through the Appalachians, matching the native range of eastern white pine. Described from Germany; in Europe it is rare and appears where P. strobus has been planted or with Swiss pine. Asian reports (with Siberian, dwarf Siberian and Korean pines) may represent a different species according to MushroomExpert.
Characteristics
Cap: 4-9 cm, convex becoming nearly flat, sticky when fresh, white when young and darkening slightly to yellowish white, bald; gluten may dry brownish. Pores: white when very young, becoming dull yellow, not bruising, angular, about 1-2 per mm; tubes to 1 cm deep. Stem: 4-9 cm long, 5-12 mm thick, sticky, whitish beneath large glandular dots and smears that start pinkish and darken to reddish brown; no ring; basal mycelium white. Flesh: whitish to yellowish, often slowly staining pinkish to reddish when cut, especially in the stem base. Odor and taste: not distinctive. Chemical reactions: ammonia and KOH turn the cap surface pink, then black or purple. Spore print: cinnamon brown. Spores: 7-9 x 2-3 µm, fusiform, smooth.
