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

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.

Westside Conifers

The wet, west-of-the-crest forests where the fall mushroom season peaks. These species drive chanterelle, hedgehog, and bolete harvests across the rainy lowlands and Coast Range.

Sitka Spruce

Picea sitchensis

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

Westside Coastal Ectomycorrhizal

Western Hemlock

Tsuga heterophylla

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

Westside Ectomycorrhizal

Western Redcedar

Thuja plicata

Forms no ectomycorrhizal partnerships, and its rot-resistant wood hosts few decomposers. Most useful as a marker of the moist, low-elevation forests where nearby hemlock and fir do the producing.

Westside

Pacific Silver Fir

Abies amabilis

A true fir of the snowy mid- to high-elevation forests of the Cascades and Olympics. Hosts chanterelles, matsutake, and hedgehogs in cool, moist mountain stands.

Westside Ectomycorrhizal

Cascade-Spanning Conifers

These conifers grow on both sides of the crest, from the wet west-side lowlands into the drier interior. They anchor mushroom habitat across the widest range of any trees in the region.

Douglas Fir

Pseudotsuga menziesii

The PNW’s most widespread conifer, found throughout Cascadia from the coast to the dry interior. Primary host for chanterelles, king boletes, and matsutake across a huge elevation range.

Westside Eastside Ectomycorrhizal

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.

Westside Eastside Ectomycorrhizal

Western White Pine

Pinus monticola

A five-needled pine of mid-elevation mixed-conifer forests on both sides of the Cascades. Hosts Suillus and other boletes; once a dominant timber tree before white pine blister rust.

Westside Eastside Ectomycorrhizal

Eastside Conifers

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

Ponderosa Pine

Pinus ponderosa

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

Eastside Ectomycorrhizal Burn Morels

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 Ectomycorrhizal Burn Morels

Engelmann Spruce

Picea engelmannii

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

Eastside Ectomycorrhizal

Western Larch

Larix occidentalis

The Northwest’s deciduous conifer — its needles turn gold and drop each fall. An eastside montane tree that partners with the larch-loving Suillus grevillei and other boletes.

Eastside Ectomycorrhizal

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

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.

Ectomycorrhizal Morels

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 Ectomycorrhizal

Red Alder

Alnus rubra

Pioneer species that colonizes disturbed sites. Forms its own specialist root partners, and dead alder wood is prime habitat for oyster mushrooms and blewits.

Westside Ectomycorrhizal

Bigleaf Maple

Acer macrophyllum

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

Westside

Pacific Madrone

Arbutus menziesii

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

Westside Ectomycorrhizal

Tanoak

Notholithocarpus densiflorus

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

Westside Ectomycorrhizal

Related Resources

Tree thumbnails via iNaturalist (CC0): Sitka spruce — Laura Holloway · Douglas fir — Quillipede · Western hemlock — Erin Springinotic · Pacific silver fir — Shane Johnson · Ponderosa pine — Daryl Nolan · Lodgepole pine — Lauren Bosch · Western larch — Kate Manning · Grand fir — Lauren Bosch · Western white pine — Erin Springinotic · Black cottonwood — Drew Meyer · Bigleaf maple — Quillipede · Pacific madrone — Quillipede · Tanoak — GinaGPark. Western redcedar, Oregon oak, and red alder photos © Salish Mushrooms.