Chak-Hao: Chak-Hao is scented glutinous rice that has been in cultivation in Manipur . It is characterized by its special aroma . The rice is black in colour and takes the longest cooking time due to the presence of a fibrous bran layer and higher crude fibre content. It is normally served as Chak-Hao kheer in the community feast. It has also been used as traditional medicine . It has been granted a GI tag .