| Abbreviation | Definition |
|---|---|
| CMV | Cucumber Mosaic Virus |
| CODEFF | Comit?? Nacional Pro Defensa de la Fauna y Flora |
| CODEFF | Comité Nacional Pro Defensa de la Fauna y Flora |
| CP | Carnivorous Plant |
| CPC | Center for Plant Conservation |
| CPD | Centre of Plant Diversity |
| CPMP | Cichlid Propagation Merit Program |
| CPOS | Central Pennsylvania Orchid Society |
| CPR | Continuous Plankton Recorder |
| CRLL | Cycas Revoluta Leaf Lectin |
| CS | Component Species |
| CSBG | Central Siberian Botanical Garden |
| CSP | Concentrating Solar Plants |
| CSSF | Committee for the Study of the Scottish Flora |
| CSSV | Cocoa Swollen Shoot Virus |
| CSVd | Chrysanthemum Stunt Viroid |
| CT | ChemoType |
| CT | Coral Tree |
| CTFS | Center for Tropical Forest Science |
| CTLA | Council of Tree and Landscape Appraisers |