Host Plants
confirmed
LikelyPacific Silver Fir
Abies amabilis
Grand Fir
Abies grandis
Subalpine Fir
Abies lasiocarpa
Vine Maple
Acer circinatum
Red Alder
Alnus rubra
Sitka Spruce
Picea sitchensis
Lodgepole Pine
Pinus contorta
Western White Pine
Pinus monticola
Quaking Aspen
Populus tremuloides
Douglas Fir
Pseudotsuga menziesii
Garry's Oak
Quercus garryana
Western Red Cedar
Thuja plicata
Western Hemlock
Tsuga heterophylla
Balsam Fir
Abies concolor
Balsam Fir
Abies magnifica
Big Leaf Maple
Acer macrophyllum
Box Elder
Acer negundo
Gray Alder
Alnus incana
Mountain Alder
Alnus incana ssp. tenuifolia
White Alder
Alnus rhombifolia
Common Juniper
Juniperus communis
Oregon Crab Apple
Malus fusca
Knobcone Pine
Pinus attenuata
Shore Pine
Pinus contorta ssp. contorta
Jeffrey Pine
Pinus jeffreyi
Sugar Pine
Pinus lambertiana
Bishop Pine
Pinus muricata
Ponderosa Pine
Pinus ponderosa
Monterey Pine
Pinus radiata
Black Cottonwood
Populus trichocarpa
Bitter Cherry
Prunus emarginata
Klamath Plum
Prunus subcordata
Chokecherry
Prunus virginiana
Western Chokecherry
Prunus virginiana var. demissa
Coast Douglas Fir
Pseudotsuga menziesii var. menziesii
Canyon Live Oak
Quercus chrysolepis
Leather Oak
Quercus durata
Garry's Oak
Quercus garryana var. breweri
Oregon White Oak
Quercus garryana var. garryana
Black Oak
Quercus kelloggii
Huckleberry Oak
Quercus vacciniifolia
Interior Live Oak
Quercus wislizeni
Stink Currant
Ribes bracteosum
Hillside Gooseberry
Ribes californicum
Spreading Gooseberry
Ribes divaricatum
Straggly Gooseberry
Ribes divaricatum var. pubiflorum
Whitestem Gooseberry
Ribes inerme
Trailing Black Currant
Ribes laxiflorum
Gummy Gooseberry
Ribes lobbii
Canyon Gooseberry
Ribes menziesii
Canyon Gooseberry
Ribes menziesii var. menziesii
Alpine Prickly Currant
Ribes montigenum
Sierra Gooseberry
Ribes roezlii
Hoary Gooseberry
Ribes roezlii var. amictum
Shinyleaf Currant
Ribes roezlii var. cruentum
Sierra Gooseberry
Ribes roezlii var. roezlii
Red Flowering Currant
Ribes sanguineum
Pink-flowering Currant
Ribes sanguineum var. glutinosum
Sandbar Willow
Salix exigua
Sandbar Willow
Salix exigua var. hindsiana