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Host Plants

Flower name confirmed
Flower name Likely

Pacific Silver Fir

Abies amabilis

Grand Fir

Abies grandis

Subalpine Fir

Abies lasiocarpa

Vine Maple

Acer circinatum

Red Alder

Alnus rubra

Green Alder

Alnus viridis

Pacific Dogwood

Cornus nuttallii

Cascara Sagrada

Frangula purshiana

Sitka Spruce

Picea sitchensis

Lodgepole Pine

Pinus contorta

Western White Pine

Pinus monticola

Ponderosa Pine

Pinus ponderosa

Quaking Aspen

Populus tremuloides

Douglas Fir

Pseudotsuga menziesii

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

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

Gray Alder

Alnus incana

Mountain Alder

Alnus incana ssp. tenuifolia

White Alder

Alnus rhombifolia

Sitka Alder

Alnus viridis ssp. sinuata

Resin Birch

Betula glandulosa

Water Birch

Betula occidentalis

Brown Dogwood

Cornus glabrata

Red Osier Dogwood

Cornus sericea

Western Dogwood

Cornus sericea ssp. occidentalis

Creek Dogwood

Cornus sericea ssp. sericea

Miner's Dogwood

Cornus sessilis

Coffeeberry

Frangula californica

California Coffeeberry

Frangula californica ssp. californica

Serpentine Hoary Coffeeberry

Frangula californica ssp. crassifolia

Sierra Hoary Coffeeberry

Frangula californica ssp. cuspidata

Western California Coffeeberry

Frangula californica ssp. occidentalis

Hoary Coffeeberry

Frangula californica ssp. tomentella

Desert Hoary Coffeeberry

Frangula californica ssp. ursina

Frangula purshiana ssp. annonifolia

Frangula purshiana ssp. purshiana

Caribou Coffee Berry

Frangula purshiana ssp. ultramafica

Sierra Coffeeberry

Frangula rubra

Frangula rubra ssp. modocensis

Frangula rubra ssp. obtusissima

Red Buckthorn

Frangula rubra ssp. rubra

Frangula rubra ssp. yosemitana

California Juniper

Juniperus californica

Common Juniper

Juniperus communis

Juniperus communis var. jackii

Common Juniper

Juniperus communis var. saxatilis

Sierra Juniper

Juniperus grandis

Western Juniper

Juniperus occidentalis

Utah Juniper

Juniperus osteosperma

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