Oat Tops, aka Avena Sativa, are the milky tops of the oat plant. Oat Tops have been consumed as a popular cereal grain for thousands of years. The young, milky Oat Tops are a favorite among herbalists for their calming and nutritive properties. Oat Tops are commonly used in tincturing. But, they can be added to bath and body blends as well as infused in teas.