Host Plants
confirmed
LikelyBalsam Fir
Abies concolor
Subalpine Fir
Abies lasiocarpa
Box Elder
Acer negundo
Gray Alder
Alnus incana
Green Alder
Alnus viridis
Bunchberry
Cornus canadensis
Sweet Cicely
Osmorhiza berteroi
Engelmann Spruce
Picea engelmannii
Quaking Aspen
Populus tremuloides
Chokecherry
Prunus virginiana
Douglas Fir
Pseudotsuga menziesii
Grand Fir
Abies grandis
Balsam Fir
Abies magnifica
California Red Fir
Abies magnifica var. magnifica
Shasta Red Fir
Abies magnifica var. shastensis
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
Red Alder
Alnus rubra
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
Resin Birch
Betula glandulosa
Water Birch
Betula occidentalis
Western Bistort
Bistorta bistortoides
Arching Ceanothus
Ceanothus arcuatus
Mountain Whitethorn
Ceanothus cordulatus
Hoaryleaf Ceanothus
Ceanothus crassifolius
Buckbrush
Ceanothus cuneatus
Buckbrush
Ceanothus cuneatus var. cuneatus
Pine Mat
Ceanothus diversifolius
Fresno Ceanothus
Ceanothus fresnensis
Desert Ceanothus
Ceanothus greggii
Coast Whitethorn
Ceanothus incanus
Deerbrush
Ceanothus integerrimus
Deerbrush
Ceanothus integerrimus var. macrothyrsus
Lemmon's Ceanothus
Ceanothus lemmonii
Chaparral Whitethorn
Ceanothus leucodermis
Cup-leaved Ceanothus
Ceanothus perplexans
Pinemat
Ceanothus prostratus
Mahala Mats
Ceanothus prostratus var. occidentalis
Large Leaved Mahala Mat
Ceanothus prostratus var. prostratus
Dwarf Ceanothus
Ceanothus pumilus
Oregon Tea Tree
Ceanothus sanguineus
Blueblossom Ceanothus
Ceanothus thyrsiflorus
Woollyleaf Ceanothus
Ceanothus tomentosus
Tobacco Brush
Ceanothus velutinus
Mojave Ceanothus
Ceanothus vestitus
Brown Dogwood
Cornus glabrata
Pacific Dogwood
Cornus nuttallii
Red Osier Dogwood
Cornus sericea
Western Dogwood
Cornus sericea ssp. occidentalis
Creek Dogwood
Cornus sericea ssp. sericea