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A list of priority invasive species that are NOT yet reliably recorded within Orange County, but expected to be threats. Information at invasives@occnps.org. |
33 PLANTS |
Perilla frutescens Small Tree-Mallow
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Alternanthera philoxeroides Alligator weed, Alligatorweed
• invasive non-native
Perennial herb |
Ammophila arenaria Beachgrass, European beach grass, European beachgrass
• invasive non-native
Perennial grass |
Arctotheca calendula Cape weed
• invasive non-native
Annual, Perennial herb |
Brassica juncea Brown mustard, India mustard
non-native
Annual herb ![]() © 2022 Vernon Smith ![]() © 2020 Zoya Akulova ![]() © 2021 Zoya Akulova |
Carduus tenuiflorus Italian thistle, Slender flowered thistle, Winged plumeless thistle
• invasive non-native
Annual herb |
Carrichtera annua Wards weed
• invasive non-native
Annual herb |
Centaurea calcitrapa Purple star thistle, Red star thistle
• invasive non-native
Annual, Perennial herb |
Centaurea stoebe Spotted knapweed
non-native
Perennial herb |
Chloris truncata Australian fingergrass, Truncate finger grass
non-native
Perennial grass ![]() © 2001 CDFA ![]() © 2001 CDFA |
Chondrilla juncea Hogbite, Skeleton weed
• invasive non-native
Perennial herb |
Cirsium arvense Canada thistle
• invasive non-native
Perennial herb |
Cortaderia jubata Pampas grass, Purple pampas grass, Pampasgrass
• invasive non-native
Perennial grass |
Cytisus scoparius Scotch broom, Scotchbroom
• invasive non-native
Shrub |
Dipsacus fullonum Fuller's teasel, Fullers' teasel, Wild teasel
• invasive non-native
Perennial herb |
Dipsacus sativus Fuller's teasel, Indian teasel
• invasive non-native
Annual, Biennial herb |
Elaeagnus angustifolia Oleaster, Russian olive
• invasive non-native
Tree, Shrub |
Enchylaena tomentosa Ruby saltbush
non-native
Perennial herb |
Euphorbia dendroides Tree spurge
non-native
Shrub |
Euphorbia virgata Leafy spurge
• invasive non-native
Perennial herb |
Helichrysum petiolare Licorice plant
• invasive non-native
Shrub, Vine |
Heliotropium supinum Dwarf heliotrope
non-native
Annual herb |
Hydrilla verticillata Hydrilla, Waterthyme
• invasive non-native
Perennial herb |
Kochia scoparia Common red sage, Mexican fireweed, Summer cypress
• invasive non-native
Annual herb |
Lepidium appelianum Hairy whitetop
• invasive non-native
Perennial herb ![]() © 2023 matsonburger ![]() © 2023 matsonburger |
Ludwigia hexapetala Ludwigia, Six petal water primrose
• invasive non-native
Perennial herb |
Lythrum salicaria Purple loosestrife
• invasive non-native
Perennial herb |
Myoporum acuminatum Strichnine bush
non-native
Tree, Shrub |
Myriophyllum aquaticum Parrot feather watermilfoil, Parrot's feather, Parrotfeather
• invasive non-native
Perennial herb (aquatic) |
Pentameris airoides ssp. airoides False Hair-grass
non-native
Perennial grass |
Ulex europaeus Common gorse
• invasive non-native
Shrub |