Host Plants
confirmed
LikelyGray Willow
Salix bebbiana
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
Common Yarrow
Achillea millefolium
Gray Alder
Alnus incana
Mountain Alder
Alnus incana ssp. tenuifolia
White Alder
Alnus rhombifolia
Red Alder
Alnus rubra
Annual Bursage
Ambrosia acanthicarpa
Ambrosia Bursage
Ambrosia ambrosioides
Beach Bur
Ambrosia chamissonis
San Diego Bursage
Ambrosia chenopodiifolia
Weakleaf Bur Ragweed
Ambrosia confertiflora
White Bursage
Ambrosia dumosa
Singlewhorl Burrobrush
Ambrosia monogyra
Western Ragweed
Ambrosia psilostachya
San Diego Ambrosia
Ambrosia pumila
Cheesebush
Ambrosia salsola
Burrobrush
Ambrosia salsola var. salsola
Western Serviceberry
Amelanchier alnifolia
Glabrous Serviceberry
Amelanchier alnifolia var. pumila
Pacific Serviceberry
Amelanchier alnifolia var. semiintegrifolia
Pale Serviceberry
Amelanchier pallida
Service Berry
Amelanchier utahensis
Saltmarsh Baccharis
Baccharis glutinosa
Malibu Baccharis
Baccharis malibuensis
Coyote Bush
Baccharis pilularis
Coyote Brush
Baccharis pilularis ssp. consanguinea
Coyote Brush
Baccharis pilularis ssp. pilularis
Plummer's Baccharis
Baccharis plummerae
San Simeon Baccharis
Baccharis plummerae ssp. glabrata
Plummer's Baccharis
Baccharis plummerae ssp. plummerae
Mulefat
Baccharis salicifolia
Mule Fat
Baccharis salicifolia ssp. salicifolia
Emory's Baccharis
Baccharis salicina
Broom Baccharis
Baccharis sarothroides
Desert Baccharis
Baccharis sergiloides
Encinitas Baccharis
Baccharis vanessae
Nodding Bur-marigold
Bidens cernua
Sticktight
Bidens frondosa
Bur Marigold
Bidens laevis
Arching Ceanothus
Ceanothus arcuatus
Mountain Whitethorn
Ceanothus cordulatus
Hoaryleaf Ceanothus
Ceanothus crassifolius
Hoary Leaved Ceanothus
Ceanothus crassifolius var. crassifolius
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