Pyrus cordata
Plymouth Pear
Ramalina fastigiata
Rhinanthus alectorolophus
European Yellow-rattle
Rhodiola rosea
Roseroot
Rosa rubiginosa
Sweet-briar
Rubia peregrina
Wild Madder
Rumex confertus
Russian Dock
Sabulina verna
Spring Sandwort
Sagina procumbens
Procumbent Pearlwort
Sagittaria sagittifolia
Arrowhead
Salix herbacea
Dwarf Willow
Salpichroa origanifolia
Cock's-eggs
Salvia pratensis
Meadow Clary
Saturnia pavonia
Emperor Moth Caterpillar
Saxifraga granulata
Meadow Saxifrage
Saxifraga hypnoides
Mossy Saxifrage
Saxifraga oppositifolia
Purple Saxifrage
Saxifraga rotundifolia
Round-leaved Saxifrage
Saxifraga tridactylites
Rue-leaved Saxifrage
Scabiosa columbaria
Small Scabious
Schedonorus giganteus
Giant Fescue
Scheuchzeria palustris
Rannoch-rush
Scleroderma aerolatum
Leopard Earthball
Scrophularia umbrosa
Green Figwort