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confirmed
Likely
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Host Plants
confirmed LikelyQuaking Aspen
Populus tremuloides
Gray Alder
Alnus incana
Mountain Alder
Alnus incana ssp. tenuifolia
White Alder
Alnus rhombifolia
Red Alder
Alnus rubra
Resin Birch
Betula glandulosa
Water Birch
Betula occidentalis
Fremont Cottonwood
Populus fremontii
Black Cottonwood
Populus trichocarpa
Gray Willow
Salix bebbiana
Booth's Willow
Salix boothii
Mountain Willow
Salix eastwoodiae
Sandbar Willow
Salix exigua
Sandbar Willow
Salix exigua var. hindsiana
Geyer's Willow
Salix geyeriana
Coastal Willow
Salix hookeriana
Red Willow
Salix laevigata
Shining Willow
Salix lasiandra
Tail-leaf Willow
Salix lasiandra var. caudata
Yellow Willow
Salix lasiandra var. lasiandra
Arroyo Willow
Salix lasiolepis
Lemmon's Willow
Salix lemmonii
Tongueleaf Willow
Salix ligulifolia
Yellow Willow
Salix lutea
Dusky Willow
Salix melanopsis
Sierra Willow
Salix orestera
Alpine Willow
Salix petrophila
Mackenzie's Willow
Salix prolixa
Scouler's Willow
Salix scouleriana
Sitka Willow
Salix sitchensis
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