Rhinanthus angustifolius
Greater Yellow-rattle
Rhinanthus minor
Yellow-rattle
Rhipsalis salicornioides
Spice Cactus
Rhodiola rosea
Roseroot
Rhododendron ferrugineum
Alpenrose
Rhododendron lindleyi
Rhododendron racemosum
Rhynchospora alba
White Beak-sedge
Ribes rubrum
Red Currant
Ribes sanguineum
Flowering Currant
Riccia fluitans
Floating crystalwort
Riccia nigrella
Black Crystalwort
Riccia subbifurca
Least Crystalwort
Ricinus communis
Castor-oil-plant
Rorippa palustris
Marsh Yellow-cress
Rorippa sylvestris
Creeping Yellow-cress
Rosa arvensis
Field-rose
Rosa caesia
Hairy Dog-rose
Rosa canina
Dog-rose
Rosa canina agg
Dog-rose
Rosa multiflora
Many-flowered Rose
Rosa sherardii
Sherard's Downy-rose
Rosa spinosissima
Burnet Rose
Rosmarinus officinalis
Rosemary