Crepe ginger (Cheilocostus speciosus)

Crêpe ginger has recently been recommended as a possible remedy for diabetes.
The leaves, seeds and creeping rhizomes contain diosgenin which helps lower
blood sugar levels. This compound also affects the production of oestrogen and
has been used to manufacture contraceptive pills. 
In traditional Indian medicine it is used for
its diuretic, anti-fungal, anti-parasitic and anti-septic effects.

Drawings of Indian plants and trees later named at the Royal Botanical Gardens Kew.