Host Plants
confirmed
LikelyWestern Bistort
Bistorta bistortoides
Sticky Cinquefoil
Drymocallis glandulosa
Sticky Cinquefoil
Drymocallis glandulosa var. glandulosa
Sticky Cinquefoil
Drymocallis pseudorupestris
Sunflower
Helianthus annuus
Serpentine Sunflower
Helianthus bolanderi
California Sunflower
Helianthus californicus
Cusick's Sunflower
Helianthus cusickii
Slender Sunflower
Helianthus gracilentus
Showy Sunflower
Helianthus niveus
Algodones Dunes Sunflower
Helianthus niveus ssp. tephrodes
Nuttall's Sunflower
Helianthus nuttallii
Los Angeles Sunflower
Helianthus nuttallii ssp. parishii
Prairie Sunflower
Helianthus petiolaris
Gray Desert Sunflower
Helianthus petiolaris ssp. canescens
Swamp Knotweed
Persicaria amphibia
Water Pepper
Persicaria hydropiperoides
Water Smartweed
Persicaria punctata
San Bernardino Bluegrass
Poa atropurpurea
Bigelow's Bluegrass
Poa bigelovii
Bolander's Bluegrass
Poa bolanderi
Beach Blue Grass
Poa confinis
Cusick's Bluegrass
Poa cusickii
Cusick's Bluegrass
Poa cusickii ssp. cusickii
Skyline Blue Grass
Poa cusickii ssp. epilis
Sand Dune Blue Grass
Poa douglasii
Muttongrass
Poa fendleriana
Long-tongue Mutton Grass
Poa fendleriana ssp. longiligula
Glaucous Bluegrass
Poa glauca
Timberline Blue Grass
Poa glauca ssp. rupicola
Howell's Bluegrass
Poa howellii
Keck's Bluegrass
Poa keckii
Kellogg's Blue Grass
Poa kelloggii
Marsh Bluegrass
Poa leptocoma
Pringle's Bluegrass
Poa pringlei
Timber Blue Grass
Poa rhizomata
One Sided Blue Grass
Poa secunda
Rush Blue Grass
Poa secunda ssp. juncifolia
One-sided Bluegrass
Poa secunda ssp. secunda
Stebbin's Bluegrass
Poa stebbinsii
Delicate Blue Grass
Poa tenerrima
San Francisco Bluegrass
Poa unilateralis
San Francisco Blue Grass
Poa unilateralis ssp. unilateralis
Wheeler's Bluegrass
Poa wheeleri
Mrs. Austin's Knotweed
Polygonum austiniae
Bolander's Knotweed
Polygonum bolanderi
California Knotweed
Polygonum californicum
Douglas' Knotweed
Polygonum douglasii
Scotts Valley Polygonum
Polygonum hickmanii
Wiry Knotweed
Polygonum majus
Marin Knotweed
Polygonum marinense
Broadleaf Knotweed
Polygonum minimum
Beach Knotweed
Polygonum paronychia
Parry's
Polygonum parryi
Milkwort Knotweed
Polygonum polygaloides
Fruitleaf Knotweed
Polygonum polygaloides ssp. confertiflorum
Modoc County Knotweed
Polygonum polygaloides ssp. esotericum
Kellogg's Knotweed
Polygonum polygaloides ssp. kelloggii
Bushy Knotweed
Polygonum ramosissimum
Bushy Knotweed
Polygonum ramosissimum ssp. ramosissimum