Hollyleaf Redberry
Rhamnus ilicifolia
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Hairyleaf Redberry
Rhamnus pilosa
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Island Redberry
Rhamnus pirifolia
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Thorny Milkwort
Rhinotropis acanthoclada
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California Milkwort
Rhinotropis californica
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Sierra Milkwort
Rhinotropis cornuta
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Sierra Milkwort
Rhinotropis cornuta var. cornuta
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Fish's Milkwort
Rhinotropis cornuta var. fishiae
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Notch-beaked Milkwort
Rhinotropis heterorhyncha
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Intermountain Milkwort
Rhinotropis intermontana
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Spiny Milkwort
Rhinotropis subspinosa
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Ledge Stonecrop
Rhodiola integrifolia
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Western Roseroot
Rhodiola integrifolia ssp. integrifolia
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Western Labrador Tea
Rhododendron columbianum
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Pacific Rhododendron
Rhododendron macrophyllum
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Western Labrador Tea
Rhododendron neoglandulosum
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Western Azalea
Rhododendron occidentale
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Pink Western Azalea
Rhododendron occidentale 'Pink'
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Western Azalea
Rhododendron occidentale var. paludosum
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Sonoma Azalea
Rhododendron occidentale var. sonomense
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Fragrant Sumac
Rhus aromatica
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skunk bush
Rhus aromatica var. trilobata
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Lemonade Berry
Rhus integrifolia
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Lemonade Berry Hybrid
Rhus integrifolia x ovata
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Sugar Bush
Rhus ovata
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White Beaked-rush
Rhynchospora alba
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California Beaked-rush
Rhynchospora californica
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Brownish Beaked-rush
Rhynchospora capitellata
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Globe Beaksedge
Rhynchospora globularis
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Bitter Gooseberry
Ribes amarum
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Golden Currant
Ribes aureum
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Golden Currant
Ribes aureum var. aureum
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Golden Currant
Ribes aureum var. gracillimum
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Trailing Gooseberry
Ribes binominatum
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Stink Currant
Ribes bracteosum
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Hillside Gooseberry
Ribes californicum
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Hillside Gooseberry
Ribes californicum var. californicum
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Hillside Gooseberry
Ribes californicum var. hesperium
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Moreno Currant
Ribes canthariforme
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Wax Currant
Ribes cereum
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Wax Currant
Ribes cereum var. cereum
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Ribes cereum var. inebrians
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Spreading Gooseberry
Ribes divaricatum
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Parish's Gooseberry
Ribes divaricatum var. parishii
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Straggly Gooseberry
Ribes divaricatum var. pubiflorum
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Northern Black Currant Currant
Ribes hudsonianum
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Western Black Currant
Ribes hudsonianum var. petiolare
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White Flowering Currant
Ribes indecorum
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Whitestem Gooseberry
Ribes inerme
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Whitestem Gooseberry
Ribes inerme var. inerme
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Whitestem Gooseberry
Ribes inerme var. klamathense
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Prickly Currant
Ribes lacustre
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Woolly-flowered Gooseberry
Ribes lasianthum
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Trailing Black Currant
Ribes laxiflorum
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Gummy Gooseberry
Ribes lobbii
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Chaparral Currant
Ribes malvaceum
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Christy Ridge Chaparral Currant
Ribes malvaceum 'Christy Ridge'
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Dancing Tassles Currant
Ribes malvaceum 'Dancing Tassels'
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White chaparral currant
Ribes malvaceum 'Rana White'
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Rinconada Rose Chaparral Currant
Ribes malvaceum 'Rinconada Rose'