virescence

The state or process of becoming green, especially the abnormal development of green coloration in plant parts, such as flowers, that are normally not green.

Greenness; viridescence.

In botany, the abnormal assumption of a green color by organs normally bright-colored, as when the petals of a flower retain their characteristic form, but become green.

The act or state of becoming green through the formation of chlorophyll.

The abnormal development of green pigmentation in plants normally not green, like flowers and shoots. Symptom may be characteristic of phytoplasma infection in plants.