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Supporting the Endangered Species Act – Where Science meets Conservation
In 2025 May, anti-environment lobbyists tried to weaken the U.S. Endangered Species Act – again. In response, local botanist Ron Vanderhoff sent a com…
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2025 OC Emergent Invasive Plant List
This list represents the 2025 prioritization of the newest and potentially most environmentally disruptive non-native plant species in Orange … -
2024 OC Emergent Invasive Plants
This list represents the 2024 prioritization of the newest and potentially most environmentally disruptive non-native plant species in Orange County. …
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2024 Invasive Watch List Species
The plants below are NOT yet reported from Orange County, but are in adjacent areas. We believe these are likely to appear in the county soon. Please…
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Known Locations and Status Updates
Select an invasive species from the list below to see the locations of known Orange County occurrences, as well as a status update from the chapter. P…
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Invasive Watch List Species 2022
Invasive Watch List
The plants below are NOT yet reported from Orange County, but are in adjacent areas. We believe these are likely …
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Links to Invasive Plant Organizations and Info
Links for Invasive Plants
Statewide organizations that have information about invasive plants occurring in Orange County:
Cal-IPC
CalFlora
P… -
Reporting an Invasive Plant
Reporting an Invasive Plant
Early detection of a new population of an invasive plant is the first
and most essential step in controlli… -
Emergent Invasive Plants in OC – Have You Seen?
OCCNPS 2022
Emergent Invasive Plants
in Orange County
Our science-based priority candidates for
Early Detection and Rapid ResponseClick on a p…
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Emergent Invasive Plant Program
OC CNPS Emergent Invasive Plant Program
“Emergent” invasive plants are specific non-native species that have appeared recently in OC, a…
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