1. Small tender herb grown for its fluffy brushlike blue to lavender blooms
   - Ageratum houstonianum

Type of: ageratum

• Ceratopetalum
• Ceratopetalum gummiferum
• Ceratophyllaceae
• Ceratophyllum
• Ceratopogon
• Ceratopogonidae
• Ceratopsia
• ceratopsian
• Ceratopsidae
• Ceratopteris
• Ceratopteris pteridioides
• Ceratopteris thalictroides
• ceratosaur
• ceratosaurus
• Ceratostomataceae
• Ceratostomella
• Ceratostomella ulmi
• Ceratotherium
• Ceratotherium simum
• ceratozamia
• Cerberus
• cercaria
• cercarial
• Cercidiphyllaceae
• Cercidiphyllum