logo Calflora Illustrated Plant List 

Northwest region priority species

A combination of eradication & surveillance target species lists for the Northwest region (Humboldt and Del Norte counties).
31 PLANTS
Agrostis avenacea    Pacific bentgrass
invasive non-native
Perennial grass

POACEAE

Agrostis avenacea
2016 Andrew Longman
Agrostis avenacea
2008 Zoya Akulova
Agrostis avenacea
2018 Doug Allshouse

Alternanthera philoxeroides    Alligator weed,  Alligatorweed
invasive non-native
Perennial herb

AMARANTHACEAE

Alternanthera philoxeroides
2020 Gina Darin
Alternanthera philoxeroides
2020 Gina Darin
Alternanthera philoxeroides
2020 Gina Darin

Alyssum murale    yellowtuft
non-native
Annual herb

BRASSICACEAE

Alyssum murale
2008 Carri Pirosko
Alyssum murale
2011 Carri Pirosko
Alyssum murale
2008 Carri Pirosko

Arundo donax    Giant reed
invasive non-native
Perennial grass

POACEAE

Arundo donax
2013 Miriam Sachs Martin
Arundo donax
2018 michelle peruzzi
Arundo donax
2020 Jennifer Mo

Brachypodium distachyon    False brome,  Purple false brome
invasive non-native
Annual, Perennial grass

POACEAE

Brachypodium distachyon
2008 Zoya Akulova
Brachypodium distachyon
2019 Ron Vanderhoff
Brachypodium distachyon
2019 Ron Vanderhoff

Carduus nutans    Musk thistle,  Nodding plumeless thistle
invasive non-native
Perennial herb

ASTERACEAE

Carduus nutans
2018 Elizabeth Brusati
Carduus nutans
2007 Steve Matson
Carduus nutans
2007 Thomas Stoughton

Carthamus lanatus    Woolly distaff thistle
invasive non-native
Annual herb

ASTERACEAE

Carthamus lanatus
2019 Lenihan Mazur
Carthamus lanatus
2019 Danielle Carney
Carthamus lanatus
2008 Eric Wrubel

Centaurea calcitrapa    Purple star thistle,  Red star thistle
invasive non-native
Annual, Perennial herb

ASTERACEAE

Centaurea calcitrapa
2005 Luigi Rignanese
Centaurea calcitrapa
2019 MCOSD EDRR
Centaurea calcitrapa
2019 Danielle Carney

Centaurea virgata ssp. squarrosa    Squarrose knapweed
invasive non-native
Perennial herb

ASTERACEAE

Centaurea virgata ssp. squarrosa
2002 Molly Elizabeth Bagley
Centaurea virgata ssp. squarrosa
2013 Gerald Carr
Centaurea virgata ssp. squarrosa
2013 Gerald Carr

Chondrilla juncea    Hogbite,  Skeleton weed
invasive non-native
Perennial herb

ASTERACEAE

Chondrilla juncea
2021 George Williams
Chondrilla juncea
2021 Bob Sweatt
Chondrilla juncea
2021 Bob Sweatt

Cynara cardunculus    Artichoke thistle,  Cardoon
invasive non-native
Perennial herb

ASTERACEAE

Cynara cardunculus
2018 Kalee Koeslag
Cynara cardunculus
2017 James Bailey
Cynara cardunculus
2017 James Bailey

Cynoglossum officinale    Gypsyflower,  Hound's tongue,  Purple houndstongue
invasive non-native
Perennial herb

BORAGINACEAE

Cynoglossum officinale
2016 Jim Moore
Cynoglossum officinale
2014 Ron Wolf
Cynoglossum officinale
2012 Zoya Akulova

Dittrichia graveolens    Stinkwort
invasive non-native
Annual herb

ASTERACEAE

Dittrichia graveolens
2008 Keir Morse
Dittrichia graveolens
2019 Andy Jones
Dittrichia graveolens
2017 Ron Vanderhoff

Echium pininana    Pine echium
non-native
Shrub

BORAGINACEAE

Echium pininana
2015 Neal Kramer
Echium pininana
2013 Zoya Akulova
Echium pininana
2019 Patrick Furtado

Eichhornia crassipes    Common water hyacinth
invasive non-native
Perennial herb

PONTEDERIACEAE

Eichhornia crassipes
2009 Barry Rice
Eichhornia crassipes
2015 Judy and Barry Breckling
Eichhornia crassipes
2020 Ron Vanderhoff

Euphorbia oblongata    Eggleaf spurge
invasive non-native
Perennial herb

EUPHORBIACEAE

Euphorbia oblongata
2017 Gary McDonald
Euphorbia oblongata
2017 Gary McDonald
Euphorbia oblongata
2014 Neal Kramer

Euphorbia virgata    Leafy spurge
invasive non-native
Perennial herb

EUPHORBIACEAE

Euphorbia virgata
2001 CDFA
Euphorbia virgata
2001 CDFA
Euphorbia virgata
© 2001 CDFA

Fallopia japonica    Japanese knotweed
invasive non-native
Perennial herb

POLYGONACEAE

Fallopia japonica
2021 Margot Cunningham
Fallopia japonica
2006 Dr. Amadej Trnkoczy
Fallopia japonica
2018 Rachel Kesel

Fallopia sachalinensis    Giant knotweed
invasive non-native
Perennial herb

POLYGONACEAE

Fallopia sachalinensis
Nick Kurzenko
Fallopia sachalinensis
2001 CDFA
Fallopia sachalinensis
2013 Domenic Bongio

Geranium lucidum    Shining geranium
invasive non-native
Annual, Biennial herb

GERANIACEAE

Geranium lucidum
2016 Dr. Amadej Trnkoczy
Geranium lucidum
2011 Phil Pullen
Geranium lucidum
2016 Dana York

Hydrilla verticillata    Hydrilla,  Waterthyme
invasive non-native
Perennial herb

HYDROCHARITACEAE

Hydrilla verticillata
2001 CDFA
Hydrilla verticillata
2001 CDFA
Hydrilla verticillata
2001 CDFA

Kochia scoparia    Common red sage,  Mexican fireweed,  Summer cypress
invasive non-native
Annual herb

CHENOPODIACEAE

Kochia scoparia
2014 Zoya Akulova
Kochia scoparia
2014 Zoya Akulova
Kochia scoparia
2012 Jean Pawek

Lepidium appelianum    Hairy whitetop
invasive non-native
Perennial herb

BRASSICACEAE

Lepidium appelianum
2001 Jeff Abbas
Lepidium appelianum
2001 CDFA
Lepidium appelianum
2016 John Doyen

Lythrum salicaria    Purple loosestrife
invasive non-native
Perennial herb

LYTHRACEAE

Lythrum salicaria
2005 Louis-M. Landry
Lythrum salicaria
2009 Barry Rice
Lythrum salicaria
2005 Louis-M. Landry

Onopordum acanthium    Scotch cottonthistle
invasive non-native
Perennial herb

ASTERACEAE

Onopordum acanthium
2013 Richard Spellenberg
Onopordum acanthium
2007 Louis-M. Landry
Onopordum acanthium
2018 Joe Woods

Persicaria wallichii    Himalayan knotweed
invasive non-native
Perennial herb

POLYGONACEAE

Persicaria wallichii
2017 Redwood Community Action Agency
Persicaria wallichii
2019 David Juliano
Persicaria wallichii
2014 Ramona Robison

Acroptilon repens    Russian knapweed
non-native
Perennial herb

ASTERACEAE

Acroptilon repens
2017 Barbara Boethling
Acroptilon repens
2013 Richard Spellenberg
Acroptilon repens
2013 Neal Kramer

Sesbania punicea    Red sesbania,  Rattlebox
invasive non-native
Shrub

FABACEAE

Sesbania punicea
2005 George W. Hartwell
Sesbania punicea
2013 Jean Pawek
Sesbania punicea
2016 Zoya Akulova

Tamarix parviflora    Fourstamen tamarisk,  Smallflower tamarisk
invasive non-native
Tree, Shrub

TAMARICACEAE

Tamarix parviflora
2020 Leslie Cobb
Tamarix parviflora
2020 Leslie Cobb
Tamarix parviflora
2015 Steve Matson

Tamarix ramosissima    Saltcedar,  Tamarisk
invasive non-native
Tree, Shrub

TAMARICACEAE

Tamarix ramosissima
2017 Barbara Boethling
Tamarix ramosissima
2000 Joe DiTomaso
Tamarix ramosissima
2000 Joe DiTomaso

Watsonia meriana    Bulbil bugle lily
invasive non-native
Perennial herb

IRIDACEAE

Watsonia meriana
2011 Vernon Smith
Watsonia meriana
2017 Juan de Dios Villarino
Watsonia meriana
2012 John Sayers