Yarsa Gumba (latin name cordyceps sinesis) is botanically a fungus. Unlike other fungus it has high value. Used as sex stimulant it has medicinal value as well.
When collection season of it nears schools are shut close in mountain region of Nepal. Dolpa, Jajarkot, Rukum, Salyan are the districts where people leave their homes for a month at least and villages are abandoned.