description Suillus Tomentosus Overview
Suillus tomentosus, the blue-staining slippery jack or woolly-capped suillus, is a North American bolete that forms mycorrhizal associations with conifers, especially two-needled pines such as lodgepole pine. Its cap is dry to viscid with grayish-brown to ocher fibrils or scales; its yellow pores and pale flesh can turn blue when bruised or cut, and its stem bears glandular dots but no ring. It is listed as edible in some references, but identification requires care because similar boletes can be difficult to distinguish.
help Suillus Tomentosus FAQ
What is Suillus tomentosus?
Suillus tomentosus is a North American bolete commonly called the blue-staining slippery jack or woolly-capped suillus. It has a cap that can be dry to viscid and marked with grayish-brown to ocher fibrils or scales.
Which trees does Suillus tomentosus grow with?
This bolete forms mycorrhizal associations with conifers, especially two-needled pines. Lodgepole pine is one of its notable host trees.
Why is Suillus tomentosus called blue-staining?
The common name refers to blue staining that can appear when parts of the mushroom are bruised or damaged. The cap may also show woolly or fibrillose markings, which explains the other common name.
Can Suillus tomentosus be identified by its cap alone?
No. Its grayish-brown to ocher cap markings are useful clues, but reliable identification also requires checking the pores, stem, staining reaction, and host tree.
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