Host Plants
confirmed
LikelyGrand Fir
Abies grandis
Subalpine Fir
Abies lasiocarpa
Red Alder
Alnus rubra
Green Alder
Alnus viridis
Sitka Spruce
Picea sitchensis
Douglas Fir
Pseudotsuga menziesii
Garry's Oak
Quercus garryana
Russet Buffaloberry
Shepherdia canadensis
Western Red Cedar
Thuja plicata
Western Hemlock
Tsuga heterophylla
Mountain Hemlock
Tsuga mertensiana
Santa Lucia Fir
Abies bracteata
Balsam Fir
Abies concolor
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
Box Elder
Acer negundo
Chamise
Adenostoma fasciculatum
Chamise
Adenostoma fasciculatum var. fasciculatum
San Diego Chamise
Adenostoma fasciculatum var. obtusifolium
Red Shanks
Adenostoma sparsifolium
Gray Alder
Alnus incana
Mountain Alder
Alnus incana ssp. tenuifolia
White Alder
Alnus rhombifolia
Resin Birch
Betula glandulosa
Water Birch
Betula occidentalis
Arching Ceanothus
Ceanothus arcuatus
Rincon Ridge Ceanothus
Ceanothus confusus
Mountain Whitethorn
Ceanothus cordulatus
Hoaryleaf Ceanothus
Ceanothus crassifolius
Hoary Leaved Ceanothus
Ceanothus crassifolius var. crassifolius
Hoary Leaved Ceanothus
Ceanothus crassifolius var. planus
Buckbrush
Ceanothus cuneatus
Buckbrush
Ceanothus cuneatus var. cuneatus
Lompoc Ceanothus
Ceanothus cuneatus var. fascicularis
Buckbrush
Ceanothus cuneatus var. ramulosus
San Diego Ceanothus
Ceanothus cyaneus
Sandscrub Ceanothus
Ceanothus dentatus
Calistoga Ceanothus
Ceanothus divergens
Pine Mat
Ceanothus diversifolius
Coyote Ceanothus
Ceanothus ferrisiae
Wavy Leaved Ceanothus
Ceanothus foliosus
Wavy Leaved Ceanothus
Ceanothus foliosus var. foliosus
La Cuesta Ceanothus
Ceanothus foliosus var. medius
Vine Hill Ceanothus
Ceanothus foliosus var. vineatus
Fresno Ceanothus
Ceanothus fresnensis
Point Reyes Ceanothus
Ceanothus gloriosus
Glory Brush
Ceanothus gloriosus var. exaltatus
Point Reyes Ceanothus
Ceanothus gloriosus var. gloriosus
Mt. Vision Ceanothus
Ceanothus gloriosus var. porrectus
Desert Ceanothus
Ceanothus greggii
Santa Barbara Ceanothus
Ceanothus impressus
Santa Barbara Ceanothus
Ceanothus impressus var. impressus
Nipomo Mesa Ceanothus
Ceanothus impressus var. nipomensis
Coast Whitethorn
Ceanothus incanus