Question: What is one of the common names of the plant that the Navajo used for fertility control?

<P0-S0> Pericome caudata is species of flowering plant in the aster family known by the common name mountain tail-leaf. <P0-S1>  It is native to the southwestern United States as far east as Colorado, Oklahoma, and Texas, as well as northern Mexico, where it grows in rocky habitat, often in hills and mountains, and sometimes in disturbed areas. <P0-S2>  It is a large, branching, leafy perennial herb or subshrub approaching 2 meters in maximum height. <P0-S3>  It is glandular, resinous, sparsely hairy, and aromatic. <P0-S4>  The leaves are somewhat triangular, sometimes with a few large teeth or sharp lobes, the blade measuring up to 12 centimeters long and borne on a petiole. <P0-S5>  The leaf size and shape is variable across the species' range. <P0-S6>  The inflorescence is a cluster of many flower heads each under a centimeter wide and filled with golden yellow disc florets. <P0-S7>  The Navajo used this plant for a variety of medicinal and ceremonial purposes. <SEP> <P1-S0> Euphorbia revoluta is a species of euphorb known by the common name threadstem sandmat. <P1-S1>  It is native to Mexico and the southwestern United States from California to the Rocky Mountains. <P1-S2>  It is an annual herb producing thin, erect stems with pairs of linear leaves, each leaf up to 2.6 centimeters long. <P1-S3>  The inflorescence is a cyathium with rounded nectar glands surrounding one female flower and several male flowers. <P1-S4>  There are sometimes white petal-like appendages as well. <P1-S5>  The Navajo used this plant as a skin lotion. <SEP> <P2-S0> Birth control, also known as contraception and fertility control, is a method or device used to prevent pregnancy. <P2-S1>  Birth control has been used since ancient times, but effective and safe methods of birth control only became available in the 20th century. <P2-S2>  Planning, making available, and using birth control is called family planning. <P2-S3>  Some cultures limit or discourage access to birth control because they consider it to be morally, religiously, or politically undesirable. <SEP> <P3-S0> Lithospermum ruderale is a species of flowering plant in the borage family known by the common name western stoneseed or lemonweed. <P3-S1>  It is native to western Canada and the western United States, where it can be found in many types of habitat. <P3-S2>  A perennial herb growing from a taproot and woody caudex, it is covered with fine, more or less upright, hairs, especially on the stems. <P3-S3>  It produces a cluster of erect leafy stems 20 to 50 centimeters tall. <P3-S4>  The stems support lance-shaped leaves up to 8 centimeters long. <P3-S5>  Bunches of flowers with leaf-like bracts appear toward the top of the stem amongst the leaves. <P3-S6>  The corolla is light yellow, often slightly greenish, and about a centimeter long and wide. <P3-S7>  The style is short. <P3-S8>  The fruit consists of one or two, sometimes four, clustered glossy grey nutlets, 3.5 to 6, sometimes as much as 8 mm long. <P3-S9>  This plant was used as a contraceptive by several Native American groups, including the Navajo and Shoshone. <P3-S10>  Studies on mice showed the plant reduced their fertility.