Gayathri, V2017-02-022017-02-022015https://ir.avinuty.ac.in/handle/avu/1245The plants used for the present study viz., Psidinm guajava L and Citrus aurantium belong to the family Myrtaceae and Rutaceae respectively. Guava is native to tropical America. The young leaves are used as tonic in digestive disorders. Bitter orange is native of South Eastern Asia; grow in Tamil Nadu, Karnataka, Maharashtra, Punjab and Uttar Pradesh. It is a rich source of provitamin A. The present investigation on the fluorescent characters of the leaf powder showed varied colours like green, pale green, dark green, brown and yellow under different chemical treatments in both the medicinal plants used for the study.