Salsola imbricata 
Salsola inermis 
Salsola oppositifolia 
Salsola schweinfurthii 
Salt Sandspurry 
Saltcedar 
Sand Catchfly 
Scented Sundew 
Schlumbergera orssichiana 
Schlumbergera russelliana 
Sea Campion 
Sea Grape 
Sea pink 
Sea Sandwort 
Sea-Purslane 
Seaberry Saltbush 
Senita cactus 
Serpentine springbeauty 
Shasta buckwheat 
Shield sundew 
Shoreline Purslane 
Short-leaf Bluebush 
Shrubby Marsh Samphire 
Shrubby Seablite