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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. |
| 22 PLANTS |
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Aegilops triuncialis Barbed goatgrass
• invasive non-native
Annual grass  2019 Jim Xerogeanes
 2008 Steve Matson
 2018 Scott Oneto
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Brassica fruticulosa Mediterranean cabbage
non-native
Annual herb  2018 Keir Morse
 2018 Keir Morse
 2018 Keir Morse
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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 benedicta Blessed thistle
non-native
Annual herb  2020 Diane Etchison
 2013 Travis Kegel
 2021 Joe Woods
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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 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
 2019 Ron Vanderhoff
|
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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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Melinis repens Natal grass
non-native
Annual grass  2016 Erik Larsen
 2021 Ron Vanderhoff
 2021 Ron Vanderhoff
|
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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
• 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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Senecio linearifolius var. linearifolius Linear-leaved australian fireweed
non-native
Annual, Perennial herb  2019 Ron Vanderhoff
 2018 Ron Vanderhoff
 2021 Ron Vanderhoff
|
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Volutaria tubuliflora Egyptian knapweed
• invasive non-native
Annual herb  2017 Ron Vanderhoff
 2020 Ron Vanderhoff
 2020 Lynn Sweet
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