It was found that usually only one part was harvested for preparing a remedy,
such as the rhizome of C. longa was use as crude drug for skin disorder.
However, some species could be used for more than 2 or all parts (whole plant) for being medicine.
For example, the bark and leaves of Morinda citrifolia were applied for blood tonic.
In addition, whole plant of Oldenlandia corymbosa could be used for lowering blood sugar.