1. Shrubby perennial of southern Australia having downy or woolly stems and undersides of leaves and racemes of red to pink flowers
   - hairy darling pea, Swainsona greyana

Type of: darling pea, poison bush

• genus Sphacelotheca
• genus Sphaeralcea
• genus Sphaerocarpos
• genus Sphaerocarpus
• genus Sphagnum
• genus Sphecius
• genus Sphecotheres
• genus Spheniscus
• genus Sphenodon
• genus Sphyraena
• genus Sphyrapicus
• genus Sphyrna
• genus Spilogale
• genus Spinacia
• genus Spinus
• genus Spiraea
• genus Spiranthes
• genus Spirillum
• genus Spirochaeta
• genus Spirodela
• genus Spirogyra
• genus Spirula
• genus Spizella
• genus Spodoptera
• genus Spondias