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Host Plants

Flower name confirmed
Flower name Likely

Vine Maple

Acer circinatum

Big Leaf Maple

Acer macrophyllum

Box Elder

Acer negundo

Gray Alder

Alnus incana

Mountain Alder

Alnus incana ssp. tenuifolia

White Alder

Alnus rhombifolia

Red Alder

Alnus rubra

Green Alder

Alnus viridis

Sitka Alder

Alnus viridis ssp. sinuata

Pacific Madrone

Arbutus menziesii

Fremont Cottonwood

Populus fremontii

Fremont Cottonwood

Populus fremontii ssp. fremontii

Black Cottonwood

Populus trichocarpa

Bitter Cherry

Prunus emarginata

Hollyleaf Cherry

Prunus ilicifolia

Hollyleaf Cherry

Prunus ilicifolia ssp. ilicifolia

Klamath Plum

Prunus subcordata

Chokecherry

Prunus virginiana

Western Chokecherry

Prunus virginiana var. demissa

Del Norte Willow

Salix delnortensis

Sandbar Willow

Salix exigua

Narrow-leaved Willow

Salix exigua var. exigua

Sandbar Willow

Salix exigua var. hindsiana

Goodding's Black Willow

Salix gooddingii

Coastal Willow

Salix hookeriana

Red Willow

Salix laevigata

Shining Willow

Salix lasiandra

Yellow Willow

Salix lasiandra var. lasiandra

Arroyo Willow

Salix lasiolepis

Dusky Willow

Salix melanopsis

Scouler's Willow

Salix scouleriana

Sitka Willow

Salix sitchensis

Tracy's Willow

Salix tracyi

Blue Elderberry

Sambucus mexicana

Black Elderberry

Sambucus nigra

Red Elderberry

Sambucus racemosa

Mountain Red Elderberry

Sambucus racemosa var. racemosa

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