Plant species | Parts used | Remarks |
Phaeomeria speciosa | Flowers | Only widely open petals were chosen |
Aquilaria subintegra | Young leaves | Healthy young leaves were chosen |
Polygonum minus Huds. | Leaves | Only healthy and green leaves were chosen |
Syzygium aromaticum | Buds | Brownish and dry buds were chosen |
Cinnamomum verum | Stem barks | Light reddish brown barks were chosen |
Piper nigrum | Drupes | Only dried and black drupes were chosen |