Sabulina verna
Spring Sandwort
Sagina nodosa
Knotted Pearlwort
Sagina procumbens
Procumbent Pearlwort
Sagittaria sagittifolia
Arrowhead
Salix herbacea
Dwarf Willow
Salpichroa origanifolia
Cock's-eggs
Salvia involucrata
Rosy-leaf sage
Salvia leucanthe
Mexican Bush Sage
Salvia pratensis
Meadow Clary
Salvia splendens
Bonfire Salvia
Sambucus canadensis
American Elderberry
Sambucus ebulus
Dwarf Elder
Sanchezia oblonga
Zebra Plant
Sandoricum koetjape
Santol
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
Schaueria calytricha
Golden Plume
Schedonorus giganteus
Giant Fescue
Scheuchzeria palustris
Rannoch-rush