1. A lady fern with deeply cut leaf segments; found in the Rocky Mountains
   - Alpine lady fern

Type of: Athyrium filix-femina, lady fern

• genus Ceratophyllum
• genus Ceratopogon
• genus Ceratopteris
• genus Ceratosaurus
• genus Ceratostomella
• genus Ceratotherium
• genus Ceratozamia
• genus Cercidiphyllum
• genus Cercidium
• genus Cercis
• genus Cercocebus
• genus Cercopithecus
• genus Cercospora
• genus Cercosporella
• genus Cereus
• genus Ceroxylon
• genus Certhia
• genus Cervus
• genus Ceryle
• genus Cestrum
• genus Cestum
• genus Ceterach
• genus Cetonia
• genus Cetorhinus
• genus Cetraria