Host Plants
confirmed
LikelyBox Elder
Acer negundo
Gray Alder
Alnus incana
Red Alder
Alnus rubra
Lodgepole Pine
Pinus contorta
Quaking Aspen
Populus tremuloides
Douglas Fir
Pseudotsuga menziesii
Gray Willow
Salix bebbiana
Russet Buffaloberry
Shepherdia canadensis
Western Red Cedar
Thuja plicata
Western Hemlock
Tsuga heterophylla
Santa Lucia Fir
Abies bracteata
Balsam Fir
Abies concolor
Grand Fir
Abies grandis
Balsam Fir
Abies magnifica
California Red Fir
Abies magnifica var. magnifica
Shasta Red Fir
Abies magnifica var. shastensis
Noble Fir
Abies procera
Vine Maple
Acer circinatum
Rocky Mountain Maple
Acer glabrum
Rocky Mountain Maple
Acer glabrum var. diffusum
Mountain Maple
Acer glabrum var. glabrum
Big Leaf Maple
Acer macrophyllum
Mountain Alder
Alnus incana ssp. tenuifolia
White Alder
Alnus rhombifolia
Green Alder
Alnus viridis
Sitka Alder
Alnus viridis ssp. sinuata
Western Serviceberry
Amelanchier alnifolia
Glabrous Serviceberry
Amelanchier alnifolia var. pumila
Pacific Serviceberry
Amelanchier alnifolia var. semiintegrifolia
Pale Serviceberry
Amelanchier pallida
Service Berry
Amelanchier utahensis
Water Birch
Betula occidentalis
Beaked Hazelnut
Corylus cornuta
California Hazel
Corylus cornuta ssp. californica
Sitka Spruce
Picea sitchensis
Dwarf Pine
Pinus albicaulis
Knobcone Pine
Pinus attenuata
Bolander's Beach Pine
Pinus contorta ssp. bolanderi
Shore Pine
Pinus contorta ssp. contorta
Tamarack Pine
Pinus contorta ssp. murrayana
Coulter Pine
Pinus coulteri
Jeffrey Pine
Pinus jeffreyi
Sugar Pine
Pinus lambertiana
Oneneedle Pinyon Pine
Pinus monophylla
Western White Pine
Pinus monticola
Bishop Pine
Pinus muricata
Ponderosa Pine
Pinus ponderosa
Pacific Ponderosa Pine
Pinus ponderosa var. pacifica
North Plateau Ponderosa Pine
Pinus ponderosa var. ponderosa
Monterey Pine
Pinus radiata
Foothill Pine
Pinus sabiniana
Fremont Cottonwood
Populus fremontii
Fremont Cottonwood
Populus fremontii ssp. fremontii
Black Cottonwood
Populus trichocarpa
Desert Peach
Prunus andersonii
Bitter Cherry
Prunus emarginata
Desert Range Almond
Prunus fasciculata
Hollyleaf Cherry
Prunus ilicifolia
Hollyleaf Cherry
Prunus ilicifolia ssp. ilicifolia
Catalina Cherry
Prunus ilicifolia ssp. lyonii