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