Emergent Invasive Plants in OC – Have You Seen?
OCCNPS 2022
Emergent Invasive Plants
in Orange County
Our science-based priority candidates for
Click on a plant for more information and images.
Plant Profiles for each species can be printed for field use.
Watch for these weeds as you visit OC’s wildlands.
Record your observations on Calflora and/or iNaturalist,
or report them to invasives@occnps.org, following
or report them to invasives@occnps.org, following
the protocols outlined in Reporting an Invasive Plant.
This list is dynamic. All species are reviewed annually.
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Emergent Invasive Plants are:
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- New to the region
- Are small populations with a potential for eradication
- Pose significant environmental impacts
Brassica fruticulosa, MEDITERRANEAN CABBAGE
Centaurea benedicta, BLESSED THISTLE
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Hypericum canariense, CANARY ISLAND ST. JOHN’S WORT
Galenia pubescens, COASTAL GALENIA
Chrysanthemoides monilifera, BONESEED
Centaurea diluta, SPOTTED KNAPWEED
Dipogon lignosus, OKIE BEAN
Melinis repens, NATAL GRASS
Euphorbia terracina, GERALTON CARNATION WEED
Aegilops triuncialis, GOATGRASS
Centaurea solstitialis, YELLOW STAR THISTLE
Parthenium hysterophorus, SANTA MARIA FEVERFEW
Volutaria tubuliflora, EGYPTIAN KNAPWEED
Senecio linearifolius, LINEAR-LEAVED AUSTRALIAN FIREWEED
Senecio angustifolius
Rubus armeniacus, HIMALAYAN BLACKBERRY