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How to Identify Larch Bolete

Suillus grevillei
EDIBLE* Season // Aug-Nov Family // Unknown

Description

The Larch Bolete displays a distinctive bright golden-yellow to orange-yellow cap (3-10 cm) with very slimy, glutinous surface when wet. Pores are bright yellow, bruising brownish. A prominent membranous ring on the yellow stem often becomes stained brown with spores. Yellow flesh does not stain. The bright yellow colors and larch association are diagnostic. Spore print is cinnamon-brown.

Specimen Profile

FamilyUnknown
GenusSuillus
EdibilityEdible*
Toxicityunknown
SeasonAug-Nov
HabitatMycorrhizal exclusively with larch (Larix species) - cannot fruit without larch trees. Forms obligate associations with European larch, Western larch, and tamarack. Found in larch plantations and native larch forests.
RegionPacific Northwest (Western larch), Rocky Mountains, Northeastern forests (tamarack), Great Lakes region, Larch plantations throughout North America, Canada, Alaska

Habitat & Distribution

Habitat: Mycorrhizal exclusively with larch (Larix species) - cannot fruit without larch trees. Forms obligate associations with European larch, Western larch, and tamarack. Found in larch plantations and native larch forests.

Region: Pacific Northwest (Western larch), Rocky Mountains, Northeastern forests (tamarack), Great Lakes region, Larch plantations throughout North America, Canada, Alaska

Seasonality

Late summer through fall (August-November) with peak fruiting in September-October. Fruits synchronously with larch in temperate regions.

Typical months: Aug-Nov

Common Lookalikes

Always verify identification to avoid these similar species. The differentiator is the point — learn the one or two tells that separate them:

Suillus luteus

HOW TO TELL APART

darker cap, with pine not larch

Other Suillus species

HOW TO TELL APART

none as bright yellow

Boletus species

HOW TO TELL APART

not viscid, different habitat

No toxic lookalikes when found with larch

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Disclaimer: This guide is for educational purposes only. Never consume a wild mushroom unless you are 100% certain of its identification.