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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 OCCNPS, 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 Conservation/Invasive Plants or by contacting invasives@occnps.org. | |
| 17 PLANTS |
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Brassica fruticulosa Mediterranean cabbage
© 2021 Ron Vanderhoff 
© 2021 Ron Vanderhoff 
© 2024 Ron Vanderhoff |
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Cenchrus echinatus Southern sandbur
© 2017 Ron Vanderhoff 
© 2018 michelle peruzzi 
© 2017 Fred Melgert / Carla Hoegen |
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Centaurea diluta North African knapweed, Star thistle
© 2020 Ron Vanderhoff 
© 2022 Ron Vanderhoff 
© 2018 James Bailey |
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Centaurea solstitialis Barnaby's thistle, Yellow star thistle
© 2022 Cynthia Powell 
© 2019 Arlee Montalvo 
© 2022 Mary Herr |
 © 2025 s2woodward 
© 2020 Ron Vanderhoff  © 2025 chris_gort |
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Ehrharta longiflora Longflowered veldtgrass
© 2020 Angelique Herman 
© 2020 Angelique Herman 
© 2020 Angelique Herman |
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Euphorbia terracina carnation spurge, Geraldton carnation weed
© 2017 Steve Matson 
© 2017 Steve Matson 
© 2017 Steve Matson |
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Hypericum canariense Canary island st. johnswort
© 2024 Ron Vanderhoff 
© 2024 Ron Vanderhoff 
© 2015 Leah Bedoian |
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Osteospermum calendulaceum Stinking roger
© 2022 Ron Vanderhoff 
© 2022 Ron Vanderhoff 
© 2022 Ron Vanderhoff |
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Parthenium hysterophorus Santa maria feverfew
© 2019 Nathan Taxel 
© 2019 Nathan Taxel 
© 2018 Ron Vanderhoff |
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Rubus armeniacus Himalayan blackberry, black berry, Armenian blackberry
© 2014 James Gonsman 
© 2018 Richard Spjut 
© 2012 Michael Mitchell |
© 2018 Ron Vanderhoff 
© 2019 Ron Vanderhoff 
© 2022 Ron Vanderhoff |
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Volutaria tubuliflora Egyptian knapweed
© 2017 Ron Vanderhoff 
© 2020 Ron Vanderhoff 
© 2020 Lynn Sweet |
