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Racosperma jibberdingensis
Radermachera sinica
x Ramberlea 'Inchgarth'
Ramonda myconii
Ramonda myconii 'Alba'
Ramonda myconii 'Jim's Shadow'
Ramonda myconii 'Rosea'
Ramonda nathaliae
Ramonda nathaliae 'Alba'
Ramonda serbica
Ranunculus acris 'Citrinus'
Ranunculus acris 'Flore Plena'
Ranunculus cortusifolius
Ranunculus extorris 'Flore Plena'
Ranunculus repens
Ranunculus kochii
Ranunculus repens 'Broken Egg'
Ranunculus repens 'Creeping Beauty'
Ranunculus repens 'Dinah Myte'
Ranunculus repens 'Gloria Spale'
Ranunculus repens 'Joe's Golden'
Ranunculus repens 'Lemon Seedling'
Ranunculus repens 'Nearly Orange'
Ranunculus repens 'Orkney Lemon'
Ranunculus repens 'Pleniflorus'
Ranunculus repens 'Snowdrift'
Ranunculus repens 'Time Bomb'
Raoulia petriensis
Rebutia albiflora
Rebutia albopilosa
Rebutia arenacea
Rebutia 'Ashcott Sunrise'
Rebutia atrovirens
Rebutia backebergii scheileana
Rebutia 'Candy Stripe'
Rebutia christinae
Rebutia espinosae
Rebutia fabrisii aureiflora
Rebutia 'Faery'
Rebutia 'Fairy'
Rebutia fiebrigii
Rebutia flavistyla
Rebutia fusca
Rebutia heliosa var. theresae
Rebutia hoffmannii
Rebutia keislingii
Rebutia 'Mandy'
Rebutia marsoneri var. krainziana
Rebutia miniuscula
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Rebutia muscula
Rebutia 'Pink Shock'
Rebutia 'Pipes of Peace'
Rebutia pulvinosa
Rebutia pygmaea var. rutiliflora
Rebutia senilis
Rebutia 'Serenade'
Rebutia simoniana
Rebutia 'Snowstorm'
Rebutia steinmannii
Rebutia 'Vanilla Ice'
Rebutia vulpina
Rehmannia elata
Reineckea carnea
Reineckea carnea SDR 330
Reineckea carnea 'Variegata'
Remusatia hookerana
Remusatia pumila
Remusatia pumila 'Mini Mask'
Remusatia vivipara
Restrepia brachypus
Restrepia falkenbergii
Restrepia lankesteri
Restrepia wageneri
Rhamnus imeretina
Rhaphidophora decursiva
Rhapis excelsa
Rheum x hybridum 'Raspberry Red'
Rheum palmatum 'Atrosanguineum'
Rhipsalis baccifera
Rhipsalis elliptica
Rhipsalis pilocarpa
Rhipsalis 'White Hairy'
Rhododendron 'Abbott'
Rhododendron 'Black Satin'
Rhododendron 'Buccaneer'
Rhododendron 'Cecile'
Rhododendron 'Chanticleer'
Rhododendron 'Elizabeth Red'
Rhododendron 'Geisha'
Rhododendron 'Goldflimmer'
Rhododendron 'Hopeful'
Rhododendron Hybrid
Rhododendron 'Katharine van Tol'
Rhododendron 'Kirin'
Rhododendron 'Loderi King George'
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Rhododendron 'Madame van Hecke'
Rhododendron 'Melle'
Rhododendron mollis
Rhododendron nakaharae 'Mariko'
Rhododendron nakaharae 'Mount Seven Stars'
Rhododendron 'Palestrina'
Rhododendron 'Pink Pearl'
Rhododendron ponticum 'Variegatum'
Rhododendron 'Praecox'
Rhododendron purple
Rhododendron 'Rosebud'
Rhododendron 'Scarlet Wonder'
Rhododendron 'Shamrock'
Rhododendron simsii
Rhododendron stenopetalum 'Linearifolium'
Rhododendron 'Stewartstonian'
Rhododendron 'Vuyk's Rosy Red'
Rhododendron 'Vuyk's Scarlet'
Rhododendron white
Rhododendron williamsianum 'Caerhays Form'
Rhododendron 'Wine and Roses'
Rhododendron yellow
Rhodohypoxis click here for full list
Rhodophiala araucana
Rhodophiala bifida
Rhodophiala 'Harry Hay'
Rhodophiala montana
Rhodophiala pratensis
Rhopalostylis sapida
Rhus chinensis
Ribes nigrum
Ribes uva-crispa 'Hinnonmaki Red'
Rodgersia aesculifolia
Rodgersia aesculifolia henricii Hybrid
Rodgersia 'Bloody Mary'
Rodgersia henricii
Rodgersia nepalensis HWJK 2104
Rodgersia pinnata ACE 2303
Rodgersia pinnata 'Chocolate Wing'
Rodgersia pinnata 'Crug Cardinal'
Rodgersia pinnata 'Elegans'
Rodgersia pinnata 'Maurice Mason'
Rodgersia pinnata SDR 3301
Rodgersia podophylla 'Crug Colossus'
Rodgersia purdomii
Rodgersia sambucifolia
Rohdea click here for full list
Roldana cristobalensis
Roldana petasitis
Romulea autumnalis
Romulea battandieri
Romulea bulbocodium
Romulea bulbocodium clusiana
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Romulea bulbocodium leichtlinii
Romulea campanuloides
Romulea citrina
Romulea engleri
Romulea hybrida
Romulea linaresii
Romulea ramiflora
Romulea zahnii
Roridula dentata
Roridula gorgonias
Rosa 'Apricot Patio'
Rosa banksiae 'Alba'
Rosa banksiae 'Lutea'
Rosa canina
Rosa 'Carefree Days'
Rosa 'Celeste'
Rosa 'Dorothy Perkins'
Rosa 'Honeymoon'
Rosa 'Many Happy Returns'
Rosa Miniature orange
Rosa Miniature pink
Rosa Miniature red
Rosa Miniature white
Rosa Miniature yellow
Rosa moyesii 'Geranium'
Rosa x odorata 'Viridiflora'
Rosa 'Pink Peace'
Rosa 'Rhapsody in Blue'
Rosa 'Rouletii'
Rosa spinosissima 'Cedric Morris'
Rosa spinosissima 'Dunwich Rose'
Rosa 'Sweet Wishes'
Rosa 'Toby Tristram'
Roscoea click here for full list
Rosmarinus officinalis 'Prostratus'
Rostrinucula dependens
Rosularia sempervivum ssp. glaucophylla
Rubus fruticosus
Rubus idaeus 'Aureus'
Rubus idaeus 'Groovy'
Rubus parviflorus 'Sunshine Spreader'
Rubus spectabilis
Rumex azoricus
Rumex sanguineus
Rumohra adiantiformis
Ruscus aculeatus 'John Redmond'
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