What effect does the leaves of osmanthus fragrans have?

It's useless But other parts are effective:

Results: Clearing lung and relieving cough, promoting blood circulation and stopping bleeding. It can be used for treating tuberculosis, hemoptysis, bronchitis, epistaxis, hematemesis, and sore throat.

Root: invigorating stomach and qi, promoting blood circulation and expelling wind. Used for gastritis, anorexia, rheumatalgia and traumatic injury.