| Rhamnus crocea |
Redberry buckthorn |
Yes |
| Rhamnus crocea – female |
Redberry buckthorn, female |
No |
| Rhamnus crocea Santa Clara County |
Redberry buckthorn Santa Clara County |
Yes |
| Rhododendron occidentale |
Western azalia |
Yes |
| Rhus aromatica |
Fragrant Sumac |
Yes |
| Rhus aromatica ‘Gro-Low’ |
'Gro-Low' Fragrant Sumac |
Yes |
| Rhus integrifolia |
Lemonade berry |
Yes |
| Rhus lentii |
Pink Flowering Sumac |
Yes |
| Rhus ovata |
Sugar bush |
Yes |
| Ribes aureum var. aureum |
Golden Currant |
Yes |
| Ribes aureum var. gracillimum |
Golden Currant |
Yes |
| Ribes californicum |
Foothill gooseberry |
No |
| Ribes divaricatum |
Spreading gooseberry |
Yes |
| Ribes indecorum |
Whiteflower currant |
Yes |
| Ribes malvaceum |
Chaparral currant |
Yes |
| Ribes malvaceum ‘Dancing Tassels’ |
'Dancing Tassels' Chaparral currant |
No |
| Ribes malvaceum ‘Montara Rose’ |
'Montara Rose' Chaparral currant |
No |
| Ribes malvaceum var malvaceum |
Chaparral currant |
Yes |
| Ribes malvaceum var malvaceum Santa Clara County |
Chaparral currant, Santa Clara County form |
Yes |
| Ribes malvaceum var viridifolium ‘Ortega Beauty’ |
'Ortega Beauty' chaparral currant |
No |
| Ribes menziesii |
Canyon goosberry |
Yes |
| Ribes nevadense |
Sierra Currant |
Yes |
| Ribes quercetorum |
Oak Gooseberry |
No |
| Ribes roezlii |
Sierra Gooseberry |
No |
| Ribes sanguineum ‘Barrie Coate’ |
'Barrie Coate' Pink flowered currant |
No |
| Ribes sanguineum ‘Claremont’ |
'Claremont' Pink flowered currant |
Yes |
| Ribes sanguineum ‘King Edward VII’ |
'King Edward VII' Pink flowered currant |
No |
| Ribes sanguineum ‘Spring Showers’ |
'Spring Showers' Pink flowered currant |
Yes |
| Ribes sanguineum var glutinosum ‘White Icicle’ |
'White Icicle' Pink flowering Currant |
Yes |
| Ribes sanguineum var glutinosum Santa Clara County |
Pink flowering currant Santa Clara County |
No |
| Ribes speciosum |
Fuschia flowered gooseberry |
No |
| Ribes thacherianum |
Santa Cruz Island gooseberry |
Yes |
| Ribes viburnifolium |
Catalina currant |
Yes |
| Ribes viburnifolium Spooner’s Mesa |
'Spooner's Mesa' Catalina Currant |
Yes |
| Romanzoffia californica |
California Romanzoffia |
Yes |
| Romneya ‘White Cloud’ |
'White Cloud' Matilija poppy |
No |
| Romneya coulteri |
Matilija poppy |
Yes |
| Rosa californica |
California wildrose |
Yes |
| Rosa californica Santa Clara County |
California wildrose, Santa Clara County form |
No |
| Rosa gymnocarpa |
Dwarf Rose |
Yes |
| Rosa nutkana |
Nootka Rose |
Yes |
| Rosa spithamea |
Ground Rose |
Yes |
| Rosa woodsii |
Woods' Rose |
Yes |
| Rubus leucodermis |
Western Rasberry |
Yes |
| Rubus parviflorus |
Western thimbleberry |
Yes |
| Rubus ursinus |
Pacific Blackberry |
Yes |
| Rudbeckia californica |
California cone flower |
No |
| Rudbeckia glaucescens |
Waxy coneflower |
Yes |
| Rudbeckia occidentalis |
Western Coneflower |
Yes |
| Ruellia californica |
Baja California Ruellia |
No |