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Weeping bolete or Slippery jack

How they differ, how to recognize them and which is more dangerous — a mushroom comparison

The short answer

Weeping bolete and Slippery jack are similar species that can be mixed up while foraging. The main visible difference: use: Weeping bolete — cook fresh, drying, pickling, Slippery jack — culinary, pickling, drying, freezing. The mushrooms also differ in the following features: cap color, cap shape, taste.

Two weeping boletes (Suillus granulatus) on green haircap moss among pine needles: slimy orange-tan caps, white stems

Weeping bolete

Suillus granulatus

EdibleExpert-verified
Slippery jack (Suillus luteus)

Slippery jack

Suillus luteus

EdibleExpert-verified

📊 Comparing characteristics

Comparison of characteristics: Weeping bolete and Slippery jack
Edibility class

Weeping bolete

Edible

Slippery jack

Edible
Season

Weeping bolete

SpringSummerAutumn

Slippery jack

SpringSummerAutumn
Use

Weeping bolete

Cook freshDryingPickling

Slippery jack

CulinaryPicklingDryingFreezing
Size

Weeping bolete

Medium (5–15 cm)

Slippery jack

Medium (5–15 cm)
Cap color

Weeping bolete

YellowBrownOrange

Slippery jack

BrownChestnut
Cap shape

Weeping bolete

Convex

Slippery jack

ConvexFlat
Cap surface

Weeping bolete

Slimy

Slippery jack

Slimy
Taste

Weeping bolete

Mild

Slippery jack

Mild
Smell

Weeping bolete

Pleasant

Slippery jack

Pleasant, mushroomy
Flesh color change

Weeping bolete

No change

Slippery jack

No change
Hymenophore

Weeping bolete

Pored

Slippery jack

Pored
Stem

Weeping bolete

Central

Slippery jack

CentralSolid
Ring (veil)

Weeping bolete

No ring

Slippery jack

Ring present
Volva

Weeping bolete

No volva

Slippery jack

No volva
Substrate

Weeping bolete

Soil

Slippery jack

SoilConifer needle litter
Nutrition type

Weeping bolete

Mycorrhizal

Slippery jack

Mycorrhizal
Partner trees

Weeping bolete

Pine

Slippery jack

Pine

📅 Seasonality

Weeping bolete

Fruiting season

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

May – November

Slippery jack

Fruiting season

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

May – October

🔬 Morphology

Cap

Weeping bolete

Cap 3-10 cm across, hemispherical with an inrolled edge when young, becoming convex-flat with time. The color is yellow-chestnut, honey-brown, reddish-brown, darker when young, fading to ocher-yellow with age. The surface is very slimy in wet weather, smooth, shiny. Glossy in dry weather. The skin peels easily from young mushrooms, with more difficulty from old ones.

Slippery jack

Cap 4–12 cm across, convex in young mushrooms, later flattened-convex. The surface is covered with a thick layer of slime — especially in wet weather. Color chocolate-brown or chestnut, yellowish brown when dry. The margin often bears remnants of the partial veil.

Hymenophore

Weeping bolete

Pores and tubes — the tubes are attached to the stem or slightly decurrent. In young mushrooms they're pale yellow, with characteristic tiny whitish droplets of milky juice. Over time the droplets dry, leaving granular brown dots on the tubes. With age the tubes turn yellow-olive. The pores are small, the same color as the tubes. Spore print ocher-brown.

Slippery jack

The hymenophore has tubes. Pores yellow, small, regular, turning yellow-green with age. The tubes are attached to the stem or run slightly down it. When pressed, the pores turn slightly brownish.

Stem

Weeping bolete

Stem 4-8 cm tall, 1-2 cm thick, cylindrical, even, without a ring. The color is yellowish, and in the upper part with characteristic tiny yellow-brown granular dots — dried droplets of milky juice. This is the main diagnostic feature of the species.

Slippery jack

Stem 5–10 cm tall, 1–2 cm thick, solid, cylindrical. Yellow and granular in the upper part, brown or violet-brownish below the ring. A characteristic purple-brown membranous ring — a remnant of the partial veil and one of the key diagnostic features of the species.

Flesh

Weeping bolete

Flesh firm when young, softening with age, creamy yellow. When cut it doesn't change color — unlike the velvet bolete. The smell and taste are mild and pleasant, with a slightly fruity note.

Slippery jack

Flesh yellowish or pale cream, firm in young mushrooms, softer in mature ones. Turns slightly pink when cut or stays unchanged. The taste is mild, pleasant, slightly sourish. The cap skin peels off easily together with the slime.

Smell

Weeping bolete

Pleasant and mushroomy with a light fruity note — especially in young ones.

Slippery jack

Smell pleasant, unobtrusively mushroomy, slightly resinous — reflecting its symbiosis with pine. With cooking the aroma intensifies and becomes more pronounced. No foreign unpleasant notes.

📍 Habitats

Weeping bolete

Conifer forest

Slippery jack

Conifer forestMixed forest

👀 Similar mushrooms — don't mix them up!

❓ Frequently asked questions

Can Weeping bolete and Slippery jack be mixed up?
Yes, they look so similar that people often mix them up. The use, cap color, cap shape help tell them apart.
How to tell Weeping bolete from Slippery jack?
The main differences: use: Weeping bolete — cook fresh, drying, pickling, Slippery jack — culinary, pickling, drying, freezing; cap color: Weeping bolete — yellow, brown, orange, Slippery jack — brown, chestnut; cap shape: Weeping bolete — convex, Slippery jack — convex, flat. The full table of characteristics is higher up on this page.
Is Slippery jack edible?
Slippery jack — edible.
When do Weeping bolete and Slippery jack grow?
Weeping bolete — May–November; Slippery jack — May–October.

Sources

  • [1]Вікіпедія (українська)
  • [2]Атлас грибів України, Зеров Д.К. (1979)
  • [3]MycoBank Database
  • [4]Index Fungorum
  • [5]GBIF
  • [6]iNaturalist Ukraine