1. California herb with white conic or bell-shaped flowers usually tinged with green
   - white fritillary

Type of: checkered lily [US], fritillary

• genus Sison
• genus Sistrurus
• genus Sisymbrium
• genus Sisyrinchium
• genus Sitophylus
• genus Sitotroga
• genus Sitta
• genus Sium
• genus Sivapithecus
• genus Sloanea
• genus Smilax
• genus Smiledon
• genus Smyrnium
• genus Sobralia
• genus Solandra
• genus Solanopteris
• genus Solanum
• genus Solea
• genus Soleirolia
• genus Solenopsis
• genus Solenostemon
• genus Solidago
• genus Somateria
• genus Sonchus
• genus Sonora