fasciation
/ˌfeɪʃiˈeɪʃən/
noun
- An abnormal condition in plants where stems or flowers become flattened and widened, often looking like a fan or ribbon.
- Gardeners sometimes call fasciation 'cresting' because of the fan-like shape.
- Fasciation in plants can be caused by a genetic mutation or bacteria.
- The rose bush showed fasciation, with one stem growing wide and flat.
Synonyms