Trees & Their Mushrooms A Forager’s Guide to Pacific Northwest Tree Species

Douglas fir and western hemlock forest in the Pacific Northwest, typical habitat for chanterelles and other mycorrhizal mushrooms

Knowing your trees is essential for mushroom hunting. Most prized edible mushrooms are mycorrhizal — they form partnerships with specific tree species. Learn the trees, and you’ll know where to look.

This guide covers the major tree species of Oregon and Washington, organized by forest type. Each profile includes the mushrooms associated with that tree, where to find them, and how to identify them.

See Tree Distributions on Forayz

Forest type layers show where each tree species dominates across Oregon and Washington. Free environmental layers for all users.

Open Forayz Map Get ForayzU on iOS

Westside Conifers

The dominant trees west of the Cascades. These species drive the fall mushroom season — chanterelles, hedgehogs, and boletes all depend on westside conifer forests.

Sitka spruce tree in coastal Pacific Northwest forest

Sitka Spruce

Picea sitchensis

Coastal rainforest giant. Supports chanterelles, hedgehogs, and lobster mushrooms in the fog belt from northern California to Alaska.

Westside Coastal Mycorrhizal Host
Douglas fir trees in Pacific Northwest forest

Douglas Fir

Pseudotsuga menziesii

The PNW’s most widespread conifer. Primary host for chanterelles, king boletes, and matsutake across a huge elevation range.

Westside Eastside Mycorrhizal Host
Western hemlock in mixed conifer forest in Oregon

Western Hemlock

Tsuga heterophylla

Shade-tolerant understory tree that dominates old-growth stands. Key host for chanterelles, hedgehogs, and admirable bolete.

Westside Mycorrhizal Host
Western redcedar tree with characteristic peeling bark

Western Redcedar

Thuja plicata

Not a strong mycorrhizal host, but dead cedar provides substrate for chicken of the woods and oyster mushrooms.

Westside Saprobic Host

Eastside Pines & Firs

East of the Cascades, drier forests of pine, fir, and spruce support different mushroom communities — including burn morels, Suillus, and spring kings.

Ponderosa pine tree with distinctive orange bark in eastern Oregon

Ponderosa Pine

Pinus ponderosa

Defines the dry eastside forests. Associates with Suillus, spring king boletes, and produces major burn morel fruitings after wildfire.

Eastside Burn Morels
Lodgepole pine forest in the Pacific Northwest mountains

Lodgepole Pine

Pinus contorta

Fire-adapted pine that colonizes after disturbance. Hosts Suillus species and is a major source of burn morels at mid-elevations.

Eastside Coastal Burn Morels
Engelmann spruce tree in high-elevation Pacific Northwest forest

Engelmann Spruce

Picea engelmannii

High-elevation eastside spruce. Associates with rainbow chanterelles, spring king boletes, and morels in mountain forests.

Eastside Mycorrhizal Host
Grand fir tree with flat needles in Pacific Northwest forest

Grand Fir

Abies grandis

A true fir common at mid-elevations on both sides of the Cascades. Hosts chanterelles and king boletes in mixed stands.

Eastside Mycorrhizal Host

Hardwoods & Broadleaves

Deciduous trees and broadleaf evergreens support a different set of mushrooms — morels in cottonwood bottoms, boletes under oaks, and saprobic species on dead alder and maple.

Black cottonwood tree along a Pacific Northwest river corridor

Black Cottonwood

Populus trichocarpa

The most important tree for yellow morels. Found along rivers and floodplains. Also supports verpa, oyster mushrooms, and a wide range of other decomposers.

Mycorrhizal Host Morels
Oregon white oak tree in a Willamette Valley savanna

Oregon White Oak

Quercus garryana

The PNW’s only native oak. Prime habitat for white king boletes and chanterelles in oak savanna and woodland.

Westside Mycorrhizal Host
Red alder tree with smooth gray bark in Pacific Northwest forest

Red Alder

Alnus rubra

Pioneer species that colonizes disturbed sites. Dead alder wood supports blewits, oyster mushrooms, and other saprobic species.

Westside Saprobic Host
Bigleaf maple tree with large leaves in Pacific Northwest forest

Bigleaf Maple

Acer macrophyllum

Mossy maple trunks host licorice fern, while dead wood supports blewits and oyster mushrooms. Common in westside forests.

Westside Saprobic Host
Pacific madrone tree with peeling red bark on a dry hillside

Pacific Madrone

Arbutus menziesii

Broadleaf evergreen on dry, sunny slopes. Mycorrhizal partner for chanterelles, especially in mixed stands with Douglas fir.

Westside Mycorrhizal Host
Tanoak tree in a southern Oregon forest

Tanoak

Notholithocarpus densiflorus

Southern Oregon and northern California. Strong mycorrhizal host for chanterelles and boletes, especially in mixed evergreen forests.

Westside Mycorrhizal Host

Find Mushroom Habitat with Forayz

Combine forest type layers with soil temperature, precipitation, and burn perimeter data to find productive habitat. Pro members get full access to all data overlays.

Open Forayz Map Get ForayzU on iOS

Also on iOS: ForayzU

Practice identifying Pacific Northwest trees and mushrooms with spaced-repetition flashcards — including a dedicated tree identification deck.

Get ForayzU

Related Resources

Forayz Map Forayz Guide Edible Mushrooms Guide Finding Morels Chanterelles Bolete Finder Mushroom Classes Guided Tours Online Lessons