1. Can emit sparks or burst into flame

See also: combustible

• genus Russula
• genus Ruta
• genus Rutilus
• genus Rynchops
• genus Rypticus
• genus Sabal
• genus Sabbatia
• genus Sabinea
• genus Saccharomyces
• genus Saccharum
• genus Sadleria
• genus Sagina
• genus Sagitta
• genus Sagittaria
• genus Sagittarius
• genus Saiga
• genus Saimiri
• genus Saintpaulia
• genus Salamandra
• genus Salicornia
• genus Salix
• genus Salmo
• genus Salmonella
• genus Salpa
• genus Salpichroa