Virescence is the abnormal development of green pigmentation in plant parts that are not normally green, like shoots or flowers (in which case it is known as floral virescence). Virescence is closely associated with phyllody (the abnormal development of flower parts into leaves) and witch`s broom (the abnormal growth of a dense mass of shoots fro....
Greening of tissue that is normally devoid of chlorophyll; the abnormal development of flowers in which all organs are green and partly or wholly transformed into structures like small leaves. 
• The act or state of becoming green through the formation of chlorophyll.
A symptom in which green pigmentation occurs in plant tissues not normally green.
Vi·res'cence (Botany) The act or state of becoming green through the formation of chlorophyll.