Weeping Boletes (Suillus granulatus)

Phylum: Basidiomycota. Class: Agaricomycetes. Order: Boletales. Family: Suillaceae

Weeping Boletes (Suillus granulatus) are common mushrooms in the Pine forests near Gawler. They’re not as common around here as the closely related and very similar looking Slippery Jack (Suillus luteus) with which they’re often confused.

Pale yellow, granular stem.
Pale yellow, granular stem.
Boletes have a spongy material beneath the cap.
Boletes have a spongy material beneath the cap.

Weeping Boletes seem to be slightly smaller and less common than their cousin but can be found under Pine needles and distinguished straight away by the slippery coating on their cap. The ones I’ve seen also seem to have a light brown cap. All Boletes have a spongy material rather than gills beneath the cap which houses the spores. The name ‘Weeping Bolete’ comes from the fact that they commonly weep a clear or milky liquid from the sponge layer. This dries on the stem to form the granules that give rise to it’s species name ‘granulatus‘.

A closeup of the stem showing the granular bumps that give them their species name 'granulatus'.
A closeup of the stem showing the granular bumps that give them their species name ‘granulatus‘.
May weep clear or milky liquid.
May weep clear or milky liquid.

Boletes need to have the outer layer of the cap to be removed before cooking. Fortunately, this is easy to do as it comes away quite easily. Removing this and the spongy layer beneath the cap improves the taste of cooked Boletes too but lots of folks don’t do this because only a little mushroom meat is left after processing.

This is a species that tasted great when dried and powdered. If you’re drying them, you don’t need to remove anything, just slice thinly and dry by your favourite method.

Identifying Weeping Boletes –

Look for Weeping Boletes in Pine forests,

  • Brown to olive green cap from 5 cm to about 10 cm in diameter
  • The cap has a slippery surface, often with pine needles and soil adhering to it
  • The outer layer of the cap is easily peeled off
  • Yellow/creamy spongy pore material underneath the cap rather than gills
  • Thick, pale yellow stem that develops granular texture with age.
  • NO annulus on the stem
  • Stem is solid in cross section.
  • Spore print – yellow/brown
Spore print is yellow/brown.
Spore print is yellow/brown.

For reference, Weeping Boletes are on page 194 of ‘A field guide to Australian Fungi’ by Bruce Fuhrer.


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