- Radermachera sinica
Asian Bell, China Doll - Ranunculus aconitifolius
Bachelor's Buttons - Ranunculus acris
Meadow Buttercup - Ranunculus acris Flore Pleno
Double Meadow Buttercup - Ranunculus aquatilis
Water Crowfoot - Ranunculus asiaticus
Persian Buttercup, Turban Buttercup, Persian Crow Foot - Ranunculus asiaticus
Persian Buttercup, Persian Crow Foot - Ranunculus collinus
Mountain Buttercup - Ranunculus constantinopolitanus
Buttercup - Ranunculus flammula
Lesser Spear Wort - Ranunculus gramineus
Grass Leaf Buttercup - Ranunculus inundatus
River Buttercup - Ranunculus lappaceus
Buttercup - Ranunculus lingua
Greater Spear Wort - Ranunculus plebeius
Buttercup - Ranzania japonica
Ranzania - Raoulia albosericea
Vegetable Sheep, Scab Weed - Raoulia australis
Raoulia - Raoulia eximia
Vegetable Sheep - Raoulia haastii
Raoulia - Raphia australis
Kosi Palm - Raphia farinifera
Raffia Palm - Ratibida columnifera
Yellow Mexican Hat - Ratibida pinnata
Drooping Cone Flower - Rauvolfia caffra
African Quinine Tree - Ravenala madagascariensis
Traveller's Palm - Ravenea rivularis
Majestic Palm - Rebutia minuscula
Red Crown Cactus - Regelia ciliata
Regelia - Regelia velutina
Barren's Regelia - Rehderodendron macrocarpum
Rehderodendron - Rehmannia elata
Chinese Foxglove - Rehmannia glutinosa
Adhesive Rehmannia, Chinese Foxglove - Reineckea carnea
Reineckea - Reinwardtia indica
Golden Dollar Plant, Yellow Flax - Reseda odorata
Mignonette, Fragrant Beauty - Reseda odorata Grandiflora
Mignonette, Fragrant Beauty - Restio paniculatus
Restio - Retama monosperma
White Weeping Broom, Bridal Veil Broom - Reynoutria japonica Compacta
Dwarf Japanese Knotweed, Compact Japanese Fleece Flower - Rhagodia spinescens
Spiny Saltbush - Rhamnus alaternus
Italian Buckthorn, Evergreen Buckthorn - Rhamnus alaternus Argentovariegata
Italian Buckthorn - Rhamnus californica
Coffee Berry - Rhamnus cathartica
European Buckthorn - Rhamnus frangula
Alder Buckthorn - Rhamnus imeretina
Buckthorn - Rhaphidophora decursiva
Shingle Plant, Creeping Philodendron - Rhaphiolepis Apple Blossom
Apple Blossom Indian Hawthorn - Rhaphiolepis delacourii
Indian Hawthorn - Rhaphiolepis indica
Indian Hawthorn - Rhaphiolepis indica Caves Beach
Indian Hawthorn - Rhaphiolepis indica Fergusonii
Indian Hawthorn - Rhaphiolepis indica Oriental Pearl
Oriental Pearl Indian Hawthorn - Rhaphiolepis indica Pink Lady
Pink Lady Indian Hawthorn - Rhaphiolepis Snow Maiden
Snow Maiden Indian Hawthorn - Rhaphiolepis Springtime
Springtime Indian Hawthorn - Rhaphiolepis umbellata
Indian Hawthorn, Yeddo Hawthorn - Rhapidophyllum hystrix
Blue Palmetto, Hedgehog Palm, Needle Palm - Rhapis excelsa
Lady Palm, Lady Finger Palm - Rhapis excelsa Variegata
Variegated Lady Palm - Rhapis humilis
Slender Lady Palm, Reed Rhapis - Rheum hybridum
Rhubarb - Rheum palmatum
Chinese Rhubarb, Turkey Rhubarb - Rhexia virginica
Meadow Beauty - Rhigozum obovatum
Yellow Pomegranate - Rhipogonum album
White Supplejack - Rhipogonum fawcettianum
Small Supplejack - Rhipsalis baccifera
Mistletoe Cactus - Rhipsalis cereuscula
Coral Cactus - Rhipsalis paradoxa
Rhipsalis - Rhipsalis teres
Link Cactus - Rhodamnia argentea
Silver Myrtle, Mallet Wood, White Myrtle - Rhodamnia rubescens
Brush Turpentine, Scrub Stringybark, Brown Mallet Wood - Rhodanthe anthemoides
Chamomile Sunray - Rhodanthe anthemoides Annan Star
Annan Star Sunray - Rhodanthe anthemoides Paper Baby
Paper Baby Sunray - Rhodanthe chlorocephala
Straw Flower - Rhodanthe chlorocephala rosea
Pink Straw Flower - Rhodanthe chlorocephala splendida
White Straw Flower - Rhodanthe humboldtiana
Golden Cluster Everlasting - Rhodanthe manglesii
Mangles Everlasting, Silver Bells, Straw Flower - Rhodanthemum atlanticum
Rhodanthemum - Rhodanthemum catananche
Rhodanthemum - Rhodanthemum gayanum
Painted Daisy - Rhodanthemum hosmariense
Moroccan Daisy - Rhodiola heterodonta
Sedum - Rhodiola rosea
Rose Root, King's Crown, Arctic Root, Orpin Rose - Rhodiola wallichiana
Sedum - Rhodocactus grandifolius
Rose Cactus - Rhodocactus nemorosus
Pereskia - Rhodochiton atrosanguineus
Purple Bell Vine - Rhododendron austrinum
Florida Flame Azalea - Rhododendron Autumn Encore Cheer
Encore Cheer Azalea - Rhododendron Belgian Indica Hybrids
Belgian Indica Azalea - Rhododendron decorum
Rhododendron - Rhododendron Hardy Hybrid Sir Robert Peel
Rhododendron - Rhododendron Hardy Hybrids
Rhododendron - Rhododendron Kurume Hybrid Christmas Cheer
Christmas Cheer Azalea - Rhododendron Kurume Hybrid Kirin
Kirin Azalea - Rhododendron Kurume Hybrid Scarlet Dragon
Scarlet Dragon Azalea - Rhododendron Kurume Hybrid Snowflake
Snowflake Azalea - Rhododendron lochiae
Australian Rhododendron - Rhododendron lochiae Viriosum
Australian Rhododendron - Rhododendron molle
Chinese Azalea, Deciduous Azalea - Rhododendron Plumtastic
Plumtastic Azalea - Rhododendron ponticum
Rhododendron | - Rhododendron prinophyllum
Mountain Pink, Rose Shell Azalea - Rhododendron Shirazz
Shirazz Azalea - Rhododendron Southern Indica Hybrid Alba Magna
Alba Magna Azalea - Rhododendron Southern Indica Hybrid Alphonse Anderson
Alphonse Anderson Azalea - Rhododendron Southern Indica Hybrid Magnifica
Magnifica Azalea - Rhododendron Southern Indica Hybrid Salmonea
Salmonea Azalea - Rhododendron Vireya Hybrids
Vireya Rhododendron - Rhodoleia championii
Hong Kong Rose - Rhodomyrtus psidioides
Native Guava - Rhodophiala
Lily - Rhodothamnus chamaecistus
Dwarf Alpine Rose - Rhodotypos scandens
Jet Bead, Jet Berry Bush - Rhoicissus capensis
Cape Grape, Evergreen Grape - Rhoicissus tomentosa
African Grape, Monkey Rope - Rhombophyllum rhomboideum
Rhombophyllum - Rhytidosporum procumbens
Billardiera - Ribes alpinum
Alpine Currant, Flowering Currant - Ribes alpinum Aureum
Golden Alpine Currant - Ribes laurifolium
Flowering Currant - Ribes odoratum
Buffalo Currant - Ribes sanguineum
Red Flowering Currant - Ribes sanguineum Albescens
White Winter Currant - Ribes sanguineum Brocklebankii
Golden Flowering Currant - Ribes speciosum
Fuchsia-Flowered Currant - Ribes viburnifolium
Flowering Currant - Richea dracophylla
Dragon Leaf Richea - Ricinocarpos Bridal Star
Wedding Bush - Ricinocarpos pinifolius
Wedding Bush - Ricinus communis
Castor Oil Plant, Castor Bean, Wonder Tree, African Coffee Tree - Ricinus communis Carmencita
Red Castor Oil Plant - Rigidella flammea
Rigidella - Robinia ambigua Decaisneana
Pink Robinia - Robinia ambigua Idahoensis
Pink Robinia - Robinia hispida
Rose Acacia, Bristly Locust - Robinia neomexicana
New Mexico Locust - Robinia pseudoacacia
False Acacia, Black Locust, Locust Tree - Robinia pseudoacacia Frisia
Golden Robinia - Robinia pseudoacacia Umbraculifera
Ball Robinia, Mop Top Robinia - Rodgersia aesculifolia
Rodgersia - Rodgersia pinnata
Rodgersia - Rodgersia pinnata Superba
Rodgersia - Rodgersia podophylla
Rodgersia - Rodgersia sambucifolia
Rodgersia - Rogiera amoena
Yellow Throated Rondeletia - Rohdea japonica
Japanese Sacred Lily, Omoto - Rohdea japonica Variegata
Variegated Japanese Sacred Lily, Omoto - Roldana petasitis
Velvet Groundsel, California Geranium - Romnalda strobilacea
Shade Lily - Romneya coulteri
Californian Tree Poppy, Matilija Poppy - Romulea fischeri
Romulea - Rondeletia odorata
Panama Rose - Rosa
Rose - Rosa banksiae
Banksia Rose - Rosa banksiae Lutea
Banksia Rose - Rosa bracteata
Macartney Rose - Rosa Excelsa
Excelsa Rose - Rosa Hybrid Tea
Hybrid Tea Rose - Rosa Noisette Lamarque
Lamarque Rose - Rosa odorata Mutabilis
Mutabilis Rose, China Rose - Roscoea beesiana
Roscoea - Roscoea cautleyoides
Roscoea - Roscoea purpurea
Roscoea - Roseodendron donnell-smithii
Primavera, Gold Tree - Rosmarinus officinalis
Rosemary - Rosmarinus officinalis albiflorus
Rosemary - Rosmarinus officinalis Aureus
Golden Rosemary - Rosmarinus officinalis Prostratus Group
Trailing Rosemary - Rosmarinus officinalis Tuscan Blue
Tuscan Blue Rosemary - Rothmannia capensis
Candle Wood, Wild Gardenia - Rothmannia globosa
Tree Gardenia - Roystonea borinquena
Puerto Rico Royal Palm - Roystonea regia
Royal Palm, Cuban Royal Palm, Florida Royal Palm - Rubus henryi bambusarum
Rubus - Rubus moluccanus trilobus
Molucca Bramble, Broad Leaf Bramble - Rubus odoratus
Flowering Raspberry, Thimble Berry - Rubus parvifolius
Native Raspberry - Rubus pentalobus
Creeping Raspberry, Creeping Bramble - Rubus rosifolius
Forest Bramble, Rose Leaf Raspberry, Thimble Berry - Rubus rugosus
Broad Leaf Bramble, Himalayan Blackberry, Keri Berry - Rudbeckia fulgida
Perennial Cone Flower, Black Eyed Susan, Orange Cone Flower - Rudbeckia hirta
Black Eyed Susan - Rudbeckia hirta Toto
Black Eyed Susan - Rudbeckia laciniata
Cut Leaf Cone Flower - Rudbeckia laciniata Hortensia
Double Cut Leaf Cone Flower - Rudbeckia occidentalis Green Wizard
Green Wizard Cone Flower - Ruellia elegans
Elegant Ruellia, Brazilian Petunia - Ruellia macrantha
Christmas Pride, Brazilian Rose - Ruellia makoyana
Trailing Velvet Plant, Monkey Plant - Ruellia simplex
Desert Ruellia, Mexican Bluebell, Britton's Wild Petunia - Ruellia squarrosa
Water Bluebell - Rumex sanguineus
Red Sorrel, Bloody Dock, Red Vein Sorrel, Blood Wort, Bloody Wood Dock - Rumohra adiantiformis
Iron Fern, Leather Fern, Leathery Shield Fern - Rupicapnos africana
Rupicapnos - Ruschia maxima
Giant Mountain Vygie - Ruscus aculeatus
Butcher's Broom - Ruscus hypoglossum
Butcher's Broom - Ruscus hypophyllum
Butcher's Broom - Ruscus microglossus
Butcher's Broom - Russelia equisetiformis
Coral Plant, Horse Tails, Fountain Bush, Firecracker Plant - Russelia equisetiformis Lemon Falls
Yellow Coral Plant, Horse Tails - Russelia equisetiformis Tangerine Falls
Coral Plant, Horse Tails - Ruta chalepensis
Fringed Rue - Ruta graveolens
Rue, Countryman's Treacle, Herb of Grace, Herb of Repentance - Rytidosperma caespitosum
Common Wallaby Grass, Ringed Wallaby Grass - Rytidosperma pallidum
Silver-Top Wallaby Grass, Red Anther Wallaby Grass
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