| Abbreviation | Definition |
|---|---|
| CBS | California Bonsai Society |
| CCC | chlorocholine chloride |
| CCCPP | California Citrus Clonal Protection Program |
| CDMP | Comprehensive Diversity Management Plan |
| CEEB | Center for Ecology Evolution and Behavior |
| CFC | Chloro Fluoro Carbon |
| CHAOS | Cataclysmic Horrific Annihilation Of Species |
| CHAPS | Centre for Horticulture And Plant Sciences |
| CIFOR | Center for International Forestry Research |
| CIMAP | Central Institute of Medicinal and Aromatic Plants |
| CIMMYT | Centro Internacional de Mejoramiento de Ma??z y Trigo (International Maize and Wheat Improvement Centre) |
| CIMMYT | Centro Internacional de Mejoramiento de Maíz Y Trigo |
| CIMMYT | Centro Internacional de Mejoramiento de Maíz y Trigo (International Maize and Wheat Improvement Centre) |
| CISC | Continuous Inventory of Stand Conditions |
| CIWT | Cold Induced Wilting Tolerance |
| CLCV | Cotton Leaf Curl Virus |
| CMBG | Coastal Maine Botanical Gardens |
| CMBS | Crape Myrtle Bark Scale |
| CMIP | Certified Manager of Invasive Plants |
| CMT | Culturally Modified Tree |