Snakemouth orchid 
Snow orchid 
Soap Aloe 
Soaptree yucca 
Sobralia crocea 
Sobralia dichotoma 
Sobralia liliastrum 
Sobralia luerorum 
Sobralia pulcherrima 
Sobralia setigera 
Society garlic 
Society Garlic 
Solomon's seal 
South African Weed Orchid 
South Indian squill 
Southern Dwarf-Iris 
Southern Marsh Orchid 
Spanish bluebell 
Spanish dagger 
Spanish iris 
Spanish-bayonet 
Spanish-Dagger 
Spathoglottis microchilina 
Spathoglottis pubescens