Quercus cerris
Turkey Oak
Quercus ilex
Evergreen Oak
Quercus petraea
Sessile Oak
Quercus robur
Pedunculate Oak
Quercus rubra
Red Oak
Quercus suber
Cork Oak
Quercus x rosacea
Ramalina calicaris
Cartilage Lichen
Ramalina cuspidata
Sea Ivory
Ramalina farinacea
Ramalina fastigiata
Ramariopsis kunzei
White Coral
Ranunculus acris
Meadow Buttercup
Ranunculus aquatilis
Common Water-crowfoot
Ranunculus auricomus
Goldilocks Buttercup
Ranunculus baudotii
Brackish Water-crowfoot
Ranunculus bulbosus
Bulbous Buttercup
Ranunculus flammula
Lesser Spearwort
Ranunculus fluitans
River Water-crowfoot
Ranunculus hederaceus
Ivy-leaved Crowfoot
Ranunculus lingua
Greater Spearwort
Ranunculus omiophyllus
Round-leaved Crowfoot
Ranunculus parviflorus
Small-flowered Buttercup
Ranunculus peltatus
Pond Water-crowfoot
Ranunculus penicillatus
Stream Water-crowfoot
Ranunculus repens
Creeping Buttercup
Ranunculus sardous
Hairy Buttercup
Ranunculus sceleratus
Celery-leaved Buttercup
Ranunculus trichophyllus
Thread-leaved Water-crowfoot
Raphanus raphanistrum
Radish
Raphanus sativus
Garden Radish
Reseda lutea
Wild Mignonette
Reseda luteola
Weld
Reynoutria japonica
Japanese Knotweed
Rhamnus cathartica
Buckthorn
Rhinanthus angustifolius
Greater Yellow-rattle
Rhinanthus minor
Yellow-rattle
Rhizocarpon geographicum
Map Lichen
Rhodiola rosea
Roseroot
Rhododendron ponticum
Rhododendron
Rhynchospora alba
White Beak-sedge
Rhynchospora fusca
Brown Beak-sedge
Ribes nigrum
Black Currant
Ribes rubrum
Red Currant
Ribes sanguineum
Flowering Currant
Ribes uva-crispa
Gooseberry
Riccia beyrichiana
Purple Crystalwort
Riccia fluitans
Floating crystalwort
Riccia nigrella
Black Crystalwort
Riccia subbifurca
Least Crystalwort
Robinia pseudoacacia
False-acacia
Romulea columnae
Sand Crocus
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 rubiginosa
Sweet-briar
Rosa rugosa
Japanese Rose
Rosa sherardii
Sherard's Downy-rose
Rosa spinosissima
Burnet Rose
Rosa stylosa
Short-styled Field-rose
Rubia peregrina
Wild Madder
Rubus aquarum
Rubus caesius
Dewberry
Rubus dasyphyllus
Rubus fruticosus agg.
Blackberry
Rubus fuscicortex