Jerangau - Acorus calamus

Acorus calamus
ARACEAE
jerangau
Europe, Asia, N. America. 'Sweet flag'. Creeping rhizome w/aromatic cells, leaves arranged in flat fans, minute yellowish flowers. Candied rhizome an old time confection. Powdered dry root said to kill white ants. Malays use it for rheumatism.

Source:
http://www.rimbundahan.org/environment/plant_lists/taman_sari/index.htm