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 flutians
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
Rubus idaeus
Raspberry
Rubus incurvatus
Rubus nemoralis
Rubus nessensis
Rubus ordovicum
Rubus pedemontanus
Rubus saxatilis
Stone Bramble
Rubus scissus
Rubus sp
Rubus spectabilis
Salmonberry
Rubus tricolor
Chinese Bramble
Rubus tuberculatus
Rubus ulmifolius
Elmleaf Blackberry
Rubus vestitus
Rumex acetosa
Common Sorrel
Rumex acetosella
Sheep's Sorrel
Rumex crispus
Curled Dock
Rumex cristatus
Greek Dock
Rumex hydrolapathum
Water Dock
Rumex maritimus
Golden Dock
Rumex obtusifolius
Broad-leaved Dock
Rumex palustris
Marsh Dock
Rumex pulcher
Fiddle Dock
Rumex rupestris
Shore Dock
Rumex sanguineus
Wood Dock
Ruppia maritima
Beaked Tasselweed
Ruscus aculeatus
Butcher's-broom
Russula sardonia
Primrose Brittlegill
Russula sp.
Sabulina verna
Spring Sandwort
Sagina apetala
Annual Pearlwort
Sagina filicaulis
Slender Pearlwort
Sagina nodosa
Knotted Pearlwort
Sagina procumbens
Procumbent Pearlwort
Sagittaria sagittifolia
Arrowhead
Salicornia dolichostachya
Long-spiked Glasswort
Salicornia emerici
Shiny Glasswort
Salicornia europaea
Common Glasswort
Salicornia fragilis
Yellow Glasswort
Salicornia ramosissima
Purple Glasswort