What is one of the common names of the plant that the Navajo used for fertility control?
Lithospermum ruderale: Lithospermum ruderale is a species of flowering plant in the borage family known by the common name western stoneseed or lemonweed. Lithospermum ruderale:  This plant was used as a contraceptive by several Native American groups, including the Navajo and Shoshone. Birth control: Birth control, also known as contraception and fertility control, is a method or device used to prevent pregnancy.
western stoneseed or lemonweed