"igusa" is a perennial plant of the family of "igusa". "igusa" smells good. it has a fresh, grassy smell. in english, they are called rushes. "igusa" blooms from may through june. the plant grows up to a length of 100 centimeters or less. they grow in marshes where sunshine is good. in japan, there are 30 kinds of "igusa" growing in many different areas.