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Host Species

Amabilis Fir - Abies amabilis

Bigleaf Maple - Acer macrophyllum

Birch - Betula papyrifera

Black Spruce - Picea mariana

Cottonwood - Populus trichocarpa

Douglas-fir - Pseudotsuga menziesii

Engelmann Spruce - Picea engelmannii

Grand Fir (Balsam) - Abies grandis

Juniper - Juniperus scopulorum

Lodgepole Pine - Pinus contorta

Mountain Hemlock - Tsuga mertensiana

Ponderosa Pine - Pinus ponderosa

Red Alder - Alnus rubra

Sitka Spruce - Picea sitchensis

Subalpine Fir - Abies lasiocarpa

Trembling Aspen - Populus tremuloides

Western Hemlock - Tsuga heterophylla

Western Larch - Larix occidentalis

Western Redcedar - Thuja plicata

Western White Pine - Pinus monticola

White Spruce - Picea glauca

Willow - Salix spp.

Yellow Cedar - Chamaecyparis nootkatensis