| WAIFS OR PLANTED INDIVIDUALS; NOT REPRODUCING | |
| Aeonium? sp. | aeonium |
| Borago officinalis (waif) | borage |
| Calocedrus decurrens | incense cedar |
| Carpobrotus chilensis | sea-fig |
| Cistus sp. | rock-rose |
| Crassula tetragone | jade plant |
| Drosanthemum hispidum | rosea iceplant |
| Fuchsia magellanica (pink cultivar) | fuchsia |
| Juglans regia | walnut |
| Laurus nobilis | sweet bay |
| Olea europaea | olive |
| Oxalis purpurea | |
| Pelargonium inquinans | garden geranium |
| Pittosporum undulatum | Victorian box |
| Pseudotsuga menziesii | douglas-fir |
| Salix babylonica? | weeping willow |
| Sequioa sempervirens | redwood |
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| REPORTED AS PRESENT IN 1968; NOT CURRENTLY DOCUMENTED | |
| APIASTRUM ANGUSTIFOLIUM | wild-celery |
| AQUILEGA FORMOSA | western columbine |
| ATHYRIUM FELIX-FEMINA var. CYCLOSORUM | western lady fern |
| BALSAMORHIZA sp. | balsamroot |
| CALYSTEGIA OCCIDENTALIS ssp. OCCIDENTALIS | western morning-glory |
| FESTUCA CALIFORNICA | California fescue |
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| REPORTED AS PRESENT IN 1990; NOT OBSERVED RECENTLY | |
| BROMUS LAEVIPES | woodland brome |
| CARDAMINE CALIFORNICA | milkmaids |
| CIRSIUM BREVISTYLUM | Indian thistle |
| GALIUM PORRIGENS var. PORRIGENS | climbing bedstraw |
| GLYCERIA LEPTOSTACHYA | mannagrass |
| MAIANTHEMUM RACEMOSUM [=SMILACINA RACEMOSA] | false solomon’s-seal |
| PERSICARIA LAPATHIFOLIA | willow-weed |
| [POLYGONUM LAPATHIFOLIUM] | |
| RUMEX TRANSITORIUS [=SALICIFOLIUS var. TRANSITORIUS] | willow dock |
| VERONICA AMERICANA | American speedwell or brooklime |
| ZANNICHELLIA PALUSTRIS | horned pondweed |
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| ERADICATED or NOT PERSISTING | |
| Anthemis cotula | mayweed |
| Arundo donax## | giant reed |
| Clarkia (cultivar) | farewell-to-spring |
| Cosmos bipinnatus | garden cosmos |
| Cymbalaria muralis | Kenilworth-ivy |
| Cynara cardunculus# | cardoon |
| Dipsacus sativus | teasel |
| Echium candicans | pride-of-Madiera |
| Eriobotrya japonica | loquat |
| Euphorbia characias | gopher-purge |
| Gastridium phleoides [=ventricosum] | nitgrass |
| Helianthus annuus (cultivar) | sunflower |
| Helianthus tuberosus | Jerusaleum-artichoke |
| Hyacinthoides hispanica [=Endymion (=Scilia) hispanicus] | Spanish bluebell |
| Impatiens balfourii [=balfouriana] | purple touch-me-not |
| Kniphofia uvaria | red-hot poker |
| Lepidium latifolium# | perennial pepperweed |
| Medicago sativa | alfalfa |
| Mirabilis jalapa | four-o’clock |
| Panicum miliaceum | broomcorn millet |
| Pericallis x hybrida [=Senecio hybridus] | cineraria |
| Ranunculus muricatus | spiny buttercup |
| Ricinus communis | castor-bean |
| Scabiosa atropurpurea | pincushion flower |
| Spergularia bocconi | sand-spurrey |
| Zantedeschia aethiopica | calla-lily |