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| 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. | ||||||
| 18 PLANTS |
|
Brassica fruticulosa Mediterranean cabbage
non-native
Annual herb 
© 2018 Keir Morse 
© 2021 Ron Vanderhoff 
© 2021 Ron Vanderhoff |
|
Cenchrus echinatus Southern sandbur
• invasive non-native
Annual grass 
© 2017 Ron Vanderhoff 
© 2018 michelle peruzzi 
© 2017 Fred Melgert / Carla Hoegen |
|
Cenchrus longispinus Mat sandbur
• invasive non-native
Annual grass 
© 2018 James Bailey 
© 2018 Ron Vanderhoff 
© 2018 Ron Vanderhoff |
|
Centaurea diluta North African knapweed, Star thistle
• invasive non-native
Annual herb 
© 2020 Ron Vanderhoff 
© 2022 Ron Vanderhoff 
© 2018 James Bailey |
|
Centaurea solstitialis Barnaby's thistle, Yellow star thistle
• invasive non-native
Annual herb 
© 2022 Cynthia Powell 
© 2019 Arlee Montalvo 
© 2022 Mary Herr |
|
non-native
© 2018 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2018 Josie Bennett |
|
Dipogon lignosus Okie bean
• invasive non-native
Perennial herb, Vine 
© 2021 Ron Vanderhoff 
© 2022 Alan Kaufmann 
© 2021 Ron Vanderhoff |
|
Ehrharta calycina Perennial veldt grass, Perennial veldtgrass
• invasive non-native
Perennial grass 
© 2020 David Greenberger 
© 2019 Ron Vanderhoff 
© 2018 Ron Vanderhoff |
|
Ehrharta longiflora Longflowered veldtgrass
• invasive non-native
Annual grass 
© 2020 Angelique Herman 
© 2020 Angelique Herman 
© 2020 Angelique Herman |
|
Euphorbia terracina carnation spurge, Geraldton carnation weed
• invasive non-native
Perennial herb 
© 2017 Steve Matson 
© 2017 Steve Matson 
© 2017 Steve Matson |
|
Galenia pubescens Coastal galenia
non-native
Perennial herb 
© 2023 Ron Vanderhoff 
© 2022 Ron Vanderhoff 
© 2020 Joan Miller |
|
Genista monspessulana French broom
• invasive non-native
Shrub 
© 2019 Ron Vanderhoff 
© 2019 Ron Vanderhoff 
© 2021 Michelle Karle |
|
Hypericum canariense Canary island st. johnswort
• invasive non-native
Shrub 
© 2024 Ron Vanderhoff 
© 2024 Ron Vanderhoff 
© 2015 Leah Bedoian |
|
Osteospermum calendulaceum Stinking roger
non-native
Perennial herb 
© 2022 Ron Vanderhoff 
© 2022 Ron Vanderhoff 
© 2022 Ron Vanderhoff |
|
Parthenium hysterophorus Santa maria feverfew
• invasive non-native
Perennial herb 
© 2019 Nathan Taxel 
© 2019 Nathan Taxel 
© 2018 Ron Vanderhoff |
|
Rubus armeniacus Himalayan blackberry, black berry, Armenian blackberry
• invasive non-native
Shrub 
© 2014 James Gonsman 
© 2018 Richard Spjut 
© 2013 Michael Mitchell |
|
non-native
Perennial herb 
© 2018 Ron Vanderhoff 
© 2019 Ron Vanderhoff 
© 2022 Ron Vanderhoff |
|
Volutaria tubuliflora Egyptian knapweed
• invasive non-native
Annual herb 
© 2017 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2020 Lynn Sweet |