State of California Department of Food and Agriculture, Division of Plant Health & Pest Prevention Services,Pest Ratings of Noxious Weed Species and Noxious Weed Seed, January 2010
| Scientific Name | Common Name | Type | Subtype | Extent | Risk of Introduction | Link |
|---|---|---|---|---|---|---|
| Rorippa austriaca | Austrian field cress | plant | herbaceous | limited | n/a (already in CA) | |
| Rorippa sylvestris | creeping yellow field cress | plant | herbaceous | limited | n/a (already in CA) | |
| Rubus armeniacus | Himalaya blackberry | plant | woody | widespread | n/a (already in CA) | View Scorecard |
| Salsola collina | spineless Russian thistle | plant | herbaceous | not present | high | |
| Salsola paulsenii | barbwire Russian-thistle | plant | herbaceous | widespread | n/a (already in CA) | |
| Salsola tragus | Russian-thistle | plant | herbaceous | widespread | n/a (already in CA) | View Scorecard |
| Salsola vermiculata | wormleaf salsola | plant | herbaceous | not present | low | |
| Salvia aethiopis | Mediterranean sage | plant | herbaceous | limited | n/a (already in CA) | View Scorecard |
| Salvia virgata | southern meadow sage | plant | herbaceous | not present | moderate | |
| Scolymus hispanicus | golden thistle | plant | herbaceous | limited | n/a (already in CA) | |
| Senecio jacobaea | tansy ragwort | plant | herbaceous | limited | n/a (already in CA) | View Scorecard |
| Senecio linearifolius | narrowleaf ragwort | plant | herbaceous | not present | low | |
| Senecio squalidus | Oxford ragwort | plant | herbaceous | not present | low | |
| Senna obtusifolia | sicklepod | plant | herbaceous | limited | n/a (already in CA) | |
| Setaria faberi | giant foxtail | plant | grass | widespread | n/a (already in CA) | |
| Solanum cardiophyllum | heartleaf nightshade | plant | herbaceous | not present | low | |
| Solanum carolinense | Carolina horsenettle | plant | herbaceous | limited | n/a (already in CA) | |
| Solanum dimidiatum | Torrey's nightshade | plant | herbaceous | limited | n/a (already in CA) | |
| Solanum elaeagnifolium | silverleaf nightshade | plant | herbaceous | limited | n/a (already in CA) | |
| Solanum lanceolatum | lanceleaf nightshade | plant | herbaceous | limited | n/a (already in CA) | |
| Solanum marginatum | white-margined nightshade | plant | woody | limited | n/a (already in CA) | |
| Sonchus arvensis | perennial sowthistle | plant | herbaceous | limited | n/a (already in CA) | |
| Sphaerophysa salsula | Austrian peaweed | plant | herbaceous | limited | n/a (already in CA) | |
| Striga asiatica | witchweed | plant | herbaceous | not present | moderate | View Scorecard |
| Symphytum asperum | rough comfrey | plant | herbaceous | limited | n/a (already in CA) | |
| Taeniatherum caput-medusae | medusahead | plant | grass | widespread | n/a (already in CA) | View Scorecard |
| Tagetes minuta | wild marigold | plant | herbaceous | not present | moderate | |
| Tribulus terrestris | puncturevine | plant | herbaceous | widespread | n/a (already in CA) | |
| Ulex europaeus | gorse | plant | woody | limited | n/a (already in CA) | View Scorecard |
| Vallisneria spp. | eelgrass | plant | herbaceous | not present | high | |
| Viscum album | European mistletoe | plant | herbaceous | limited | n/a (already in CA) | |
| Zostera japonica | Japanese eelgrass | plant | herbaceous | limited | n/a (already in CA) | |
| Zygophyllum fabago | Syrian beancaper | plant | herbaceous | limited | n/a (already in CA) |