1. Coming next after the twenty-fourth in position
   - 25th

See also: ordinal

• 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
• genus Salpiglossis
• genus Salpinctes
• genus Salsola
• genus Salvadora
• genus Salvelinus
• genus Salvia
• genus Salvinia
• genus Sambucus
• genus Samia