Rorippa sylvestris
Creeping Yellow-cress
Rosa caesia
Hairy Dog-rose
Rosa multiflora
Many-flowered Rose
Rosa sp.
Rosa spinosissima
Burnet Rose
Rosa stylosa
Short-styled Field-rose
Rosmarinus officinalis
Rosemary
Rubia peregrina
Wild Madder
Rubus ariconiensis
Rubus caesius
Dewberry
Rubus dasyphyllus
Rubus fuscicortex
Rubus nessensis
Rubus pedemontanus
Rubus scissus
Rubus tricolor
Chinese Bramble
Rubus ulmifolius
Rumex acetosa
Common Sorrel
Rumex crispus
Curled Dock
Rumex cristatus
Greek Dock
Rumex obtusifolius
Broad-leaved Dock
Rumex pulcher
Fiddle Dock
Rumex rupestris
Shore Dock
Ruppia maritima
Beaked Tasselweed
Ruscus aculeatus
Butcher's-broom
Sabulina verna
Spring Sandwort
Sagina apetala
Annual Pearlwort
Sagina nodosa
Knotted Pearlwort
Salix aurita
Eared Willow
Salix caprea
Goat Willow
Salix pentandra
Bay Willow
Salix repens
Creeping Willow
Salix x fragilis
Crack-willow
Salix x meyeriana
Shiny-leaved Willow
Salsola kali
Prickly Saltwort
Salvia verbenaca
Wild Clary
Sambucus ebulus
Dwarf Elder
Sanguisorba officinalis
Great Burnet
Sanicula europaea
Sanicle
Saxifraga aizoides
Yellow Saxifrage
Saxifraga granulata
Meadow Saxifrage
Saxifraga hypnoides
Mossy Saxifrage
Saxifraga rosacea
Irish Saxifrage
Saxifraga spathularis
St Patrick's-cabbage
Saxifraga tridactylites
Rue-leaved Saxifrage
Saxifraga x polita
False Londonpride
Scabiosa columbaria
Small Scabious
Schoenoplectus tabernaemontani
Grey Club-rush
Scilla autumnalis
Autumn Squill
Scilla verna
Spring Squill
Scirpus sylvaticus
Wood Club-rush
Scrophularia auriculata
Water Figwort
Scrophularia nodosa
Common Figwort
Scrophularia umbrosa
Green Figwort
Scutellaria galericulata
Skullcap
Scutellaria minor
Lesser Skullcap
Senecio cambrensis
Welsh Groundsel
Senecio inaequidens
Narrow-leaved Ragwort
Senecio vulgaris
Groundsel
Sequoia sempervirens
Coastal Redwood
Serratula tinctoria
Saw-wort
Sherardia arvensis
Field Madder
Sibthorpia europaea
Cornish Moneywort
Silene conica
Sand Catchfly
Silene dioica
Red Campion
Silene flos-cuculi
Ragged-Robin
Silene latifolia
White Campion
Silene noctiflora
Night-flowering Catchfly
Silene nutans
Nottingham Catchfly
Silene viscaria
Sticky Catchfly