Host Plants
confirmed
LikelyPacific Silver Fir
Abies amabilis
Grand Fir
Abies grandis
Subalpine Fir
Abies lasiocarpa
Red Alder
Alnus rubra
Sitka Spruce
Picea sitchensis
Douglas Fir
Pseudotsuga menziesii
Western Red Cedar
Thuja plicata
Western Hemlock
Tsuga heterophylla
Mountain Hemlock
Tsuga mertensiana
Balsam Fir
Abies concolor
Balsam Fir
Abies magnifica
California Red Fir
Abies magnifica var. magnifica
Shasta Red Fir
Abies magnifica var. shastensis
Noble Fir
Abies procera
Gray Alder
Alnus incana
Mountain Alder
Alnus incana ssp. tenuifolia
White Alder
Alnus rhombifolia
Green Alder
Alnus viridis
Sitka Alder
Alnus viridis ssp. sinuata
Weeping Spruce
Picea breweriana
Engelmann Spruce
Picea engelmannii
Dwarf Pine
Pinus albicaulis
Knobcone Pine
Pinus attenuata
Foxtail Pine
Pinus balfouriana
Foxtail Pine
Pinus balfouriana ssp. austrina
Lodgepole Pine
Pinus contorta
Bolander's Beach Pine
Pinus contorta ssp. bolanderi
Shore Pine
Pinus contorta ssp. contorta
Tamarack Pine
Pinus contorta ssp. murrayana
Coulter Pine
Pinus coulteri
Limber Pine
Pinus flexilis
Jeffrey Pine
Pinus jeffreyi
Sugar Pine
Pinus lambertiana
Hickory Pine
Pinus longaeva
Oneneedle Pinyon Pine
Pinus monophylla
Western White Pine
Pinus monticola
Bishop Pine
Pinus muricata
Ponderosa Pine
Pinus ponderosa
North Plateau Ponderosa Pine
Pinus ponderosa var. ponderosa
Monterey Pine
Pinus radiata
Foothill Pine
Pinus sabiniana
Coast Douglas Fir
Pseudotsuga menziesii var. menziesii
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