1. Stout perennial herb of western United States having flower heads with drooping orange-yellow rays; causes spewing sickness in sheep
   - orange sneezeweed, Helenium hoopesii

Type of: sneezeweed

• genus Sapindus
• genus Saponaria
• genus Saprolegnia
• genus Sarcobatus
• genus Sarcocephalus
• genus Sarcochilus
• genus Sarcocystis
• genus Sarcodes
• genus Sarcophaga
• genus Sarcophilus
• genus Sarcoptes
• genus Sarcorhamphus
• genus Sarcostemma
• genus Sarda
• genus Sardina
• genus Sardinia
• genus Sardinops
• genus Sargassum
• genus Sarracenia
• genus Sassafras
• genus Satureia
• genus Satureja
• genus Saturnia
• genus Sauromalus
• genus Saurosuchus