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
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