Ranunculus omiophyllus
Round-leaved Crowfoot
Raphanus raphanistrum
Sea Radish
Reynoutria japonica
Japanese Knotweed
Rhinanthus minor
Yellow-rattle
Rhododendron ponticum
Rhododendron
Rosa spinosissima
Burnet Rose
Rubus spectabilis
Salmonberry
Rumex acetosella
Sheep's Sorrel
Russula sp.
Sagina procumbens
Procumbent Pearlwort
Samolus valerandi
Brookweed
Saxifraga hirsuta
Kidney Saxifrage
Saxifraga spathularis
St Patrick's-cabbage
Saxifraga tridactylites
Rue-leaved Saxifrage
Saxifraga x polita
False Londonpride
Schoenus nigricans
Black Bog-rush
Scrophularia auriculata
Water Figwort
Scrophularia nodosa
Common Figwort
Sedum anglicum
English Stonecrop
Senecio sarracenicus
Broad-leaved Ragwort
Senecio squalidus
Oxford Ragwort
Silene flos-cuculi
Ragged-Robin
Silene uniflora
Sea Campion
Solidago virgaurea
Goldenrod