Velvet bolete, the one whose skin won't peel

Most slippery jacks are easy to recognize by their slimy cap, which peels so conveniently. But there's an exception among them: the velvet bolete (Suillus variegatus, listed in our catalog as velvet bolete). Its cap is almost dry and granular, and the skin barely peels at all.

Because of this, beginners sometimes wonder whether it's a slippery jack at all. On top of that, it blues slightly when cut, which is confusing too. Let's go through both traits so you can recognize it with confidence.

A slippery jack that doesn't look like one

The velvet bolete breaks the usual expectations. Instead of a glossy, slimy cap, it has a dry, finely granular surface that looks dusted with sand, in ocher-yellow or brownish-olive tones. Slime appears only in very wet weather, and even then it's barely noticeable.

That's why the skin hardly comes off the cap at all, unlike the slippery jack. In the kitchen this is actually handy: the mushroom is easier to clean, you just wipe and rinse it.

Like all slippery jacks, it lives in partnership with pine. This bond is called mycorrhiza: the mycelium wraps around the tree's rootlets and trades nutrients with it.

Why it blues when cut

The second quirk of the velvet bolete is a slight bluing of the flesh where it's cut or broken. This alarms people who are used to boletes and slippery jacks not changing color when cut.

You can relax here: for this species, faint bluing is a normal, harmless reaction. It doesn't mean the mushroom is poisonous. The velvet bolete is edible, although its flavor falls a little short of the classic slippery jacks, so it's often picked for preserving rather than as the main prize.

Still, if you're not sure of your identification, bluing is a reason to double-check every feature before you put the mushroom in your basket.

How to recognize the velvet bolete

It's identified by a combination of features, not just one. Look the mushroom over from top to bottom.

• Cap. Dry, finely granular, ocher-yellow or brownish-olive. Slimy only in very wet weather. The skin barely peels.
• Pores. The tube layer underneath: olive-brown, with small pores.
• Stem. Firm, yellowish-brown, with no ring.
• Flesh. Yellowish, blues slightly when cut, especially above the tubes.

The main clue: a dry, granular cap plus slight bluing of the cut. That's what sets it apart from its relatives.

How it differs from other slippery jacks

• Compared with the slippery jack, it has a dry cap, no ring, and skin that doesn't peel.
• Compared with the bovine bolete, it has finer pores and blues when cut.

Essentially, it's a dryish, slightly “atypical” slippery jack for those who pick for preserving.

Where and when to look for it

The best spots are:

• pine woods on sandy and dampish soils;
• sunny edges of conifer forest with moss and bilberry;
• patches of mixed forest where pine grows alongside birch.

The season runs from July to October, in flushes after warm rains. The best time to go is a day or two after rain. You can keep track of these windows with our mushroom radar: it shows when moisture and warmth line up well for mushrooms to appear.

A little caution never hurts

The velvet bolete is safe, but its dryish cap and bluing make it easier to mix up with other mushrooms in your head. So check every feature: a spongy underside, no gills, and a pine nearby. And as always: if you're not sure, don't pick it.

Sources

• “Identification Guide to the Fungi of Ukraine” (Kyiv, Naukova Dumka publishing house).
• Suillus variegatus on GBIF, a global biodiversity database.
• Suillus variegatus on MycoBank, an international fungal nomenclature database.
• Suillus variegatus on Wikipedia.