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