logo Calflora Illustrated Plant List 


Used by the Orange County Chapter of CNPS to monitor a dynamic list of Emergent Invasive Plants within Orange County. As defined by OC CNPS, these are non-native plants that are recently arrived in OC or with very few populations and are believed to pose a significant threat to our natural areas. More information can be found at www.occnps.org, under Invasive Plants or by contacting invasives@occnps.org.
22 PLANTS
Aegilops triuncialis    Barbed goatgrass
invasive non-native
Annual grass

POACEAE

Aegilops triuncialis
2019 Jim Xerogeanes
Aegilops triuncialis
2008 Steve Matson
Aegilops triuncialis
2018 Scott Oneto

Brassica fruticulosa    Mediterranean cabbage
non-native
Annual herb

BRASSICACEAE

Brassica fruticulosa
2018 Keir Morse
Brassica fruticulosa
2018 Keir Morse
Brassica fruticulosa
2018 Keir Morse

Cenchrus echinatus    Southern sandbur
invasive non-native
Annual grass

POACEAE

Cenchrus echinatus
2017 Ron Vanderhoff
Cenchrus echinatus
2018 michelle peruzzi
Cenchrus echinatus
2017 Fred Melgert / Carla Hoegen

Cenchrus longispinus    Mat sandbur
invasive non-native
Annual grass

POACEAE

Cenchrus longispinus
2018 James Bailey
Cenchrus longispinus
2018 Ron Vanderhoff
Cenchrus longispinus
2018 Ron Vanderhoff

Centaurea benedicta    Blessed thistle
non-native
Annual herb

ASTERACEAE

Centaurea benedicta
2020 Diane Etchison
Centaurea benedicta
2013 Travis Kegel
Centaurea benedicta
2021 Joe Woods

Centaurea diluta    North African knapweed,  Star thistle
invasive non-native
Annual herb

ASTERACEAE

Centaurea diluta
2020 Ron Vanderhoff
Centaurea diluta
2022 Ron Vanderhoff
Centaurea diluta
2018 James Bailey

Centaurea solstitialis    Barnaby's thistle,  Yellow star thistle
invasive non-native
Annual herb

ASTERACEAE

Centaurea solstitialis
2022 Cynthia Powell
Centaurea solstitialis
2019 Arlee Montalvo
Centaurea solstitialis
2022 Mary Herr

non-native

ASTERACEAE

Chrysanthemoides monilifera
2018 Josie Bennett
Chrysanthemoides monilifera
2018 Ron Vanderhoff
Chrysanthemoides monilifera
2020 Ron Vanderhoff

Dipogon lignosus    Okie bean
invasive non-native
Perennial herb, Vine

FABACEAE

Dipogon lignosus
2021 Ron Vanderhoff
Dipogon lignosus
2022 Alan Kaufmann
Dipogon lignosus
2021 Ron Vanderhoff

Ehrharta calycina    Perennial veldt grass,  Perennial veldtgrass
invasive non-native
Perennial grass

POACEAE

Ehrharta calycina
2020 David Greenberger
Ehrharta calycina
2019 Ron Vanderhoff
Ehrharta calycina
2018 Ron Vanderhoff

Ehrharta longiflora    Longflowered veldtgrass
invasive non-native
Annual grass

POACEAE

Ehrharta longiflora
2020 Angelique Herman
Ehrharta longiflora
2020 Angelique Herman
Ehrharta longiflora
2020 Angelique Herman

Euphorbia terracina    Geraldton carnation weed
invasive non-native
Perennial herb

EUPHORBIACEAE

Euphorbia terracina
2021 Ron Vanderhoff
Euphorbia terracina
2021 Ron Vanderhoff
Euphorbia terracina
2017 Steve Matson

Galenia pubescens    Coastal galenia
non-native
Perennial herb

AIZOACEAE

Galenia pubescens
2023 Ron Vanderhoff
Galenia pubescens
2022 Ron Vanderhoff
Galenia pubescens
2020 Joan Miller

Genista monspessulana    French broom
invasive non-native
Shrub

FABACEAE

Genista monspessulana
2019 Ron Vanderhoff
Genista monspessulana
2019 Ron Vanderhoff
Genista monspessulana
2019 Ron Vanderhoff

Hypericum canariense    Canary island st. johnswort
invasive non-native
Shrub

HYPERICACEAE

Hypericum canariense
2019 Patrick Furtado
Hypericum canariense
2019 Patrick Furtado
Hypericum canariense
2015 Leah Bedoian

Melinis repens    Natal grass
non-native
Annual grass

POACEAE

Melinis repens
2016 Erik Larsen
Melinis repens
2021 Ron Vanderhoff
Melinis repens
2021 Ron Vanderhoff

Osteospermum calendulaceum    Stinking roger
non-native
Perennial herb

ASTERACEAE

Osteospermum calendulaceum
2022 Ron Vanderhoff
Osteospermum calendulaceum
2022 Ron Vanderhoff
Osteospermum calendulaceum
2022 Ron Vanderhoff

Parthenium hysterophorus    Santa maria feverfew
invasive non-native
Perennial herb

ASTERACEAE

Parthenium hysterophorus
2019 Nathan Taxel
Parthenium hysterophorus
2019 Nathan Taxel
Parthenium hysterophorus
2018 Ron Vanderhoff

Rubus armeniacus    Himalayan blackberry,  black berry
invasive non-native
Shrub

ROSACEAE

Rubus armeniacus
2014 James Gonsman
Rubus armeniacus
2020 Julie A. Kierstead
Rubus armeniacus
2018 Richard Spjut

non-native
Perennial herb

ASTERACEAE

Senecio angustifolius
2018 Ron Vanderhoff
Senecio angustifolius
2019 Ron Vanderhoff
Senecio angustifolius
2022 Ron Vanderhoff

Senecio linearifolius var. linearifolius    Linear-leaved australian fireweed
non-native
Annual, Perennial herb

ASTERACEAE

Senecio linearifolius var. linearifolius
2019 Ron Vanderhoff
Senecio linearifolius var. linearifolius
2018 Ron Vanderhoff
Senecio linearifolius var. linearifolius
2021 Ron Vanderhoff

Volutaria tubuliflora    Egyptian knapweed
invasive non-native
Annual herb

ASTERACEAE

Volutaria tubuliflora
2017 Ron Vanderhoff
Volutaria tubuliflora
2020 Ron Vanderhoff
Volutaria tubuliflora
2020 Lynn Sweet