ACORUS CALAMUS/VACHA, (also called sweet flag, sway or muskrat root, among many common names. .Is a herbaceous perennial, 2 m (79 in) tall. Its leaves resembles those of the iris family. Sweet flag consists of tufts of basal leaves that rise from a spreading rhizome. The leaves are erect yellowish-brown, radical, with pink sheathing at their bases, sword-shaped, flat and narrow, tapering into a long, acute point, and have parallel veins. The leaves have smooth edges, which can be wavy or crimped. The sweet flag can be distinguished from iris and other similar plants by the crimped edges of the leaves, the fragrant odor it emits when crushed, and the presence of a spadix.

USES :

Vayambu For Depression, Epilepsy & Boosting Memory:
Vayambu decoction is very calming on the nerves and is also said to improve memory. It also acts like a nerve tonic helping one relax during stress and depression, you can read the study that proves this use here. It also helps people who suffer from epilepsy.