Argemone pleiacantha  ( ) ( ) Papaveraceae It is a perennial herb, bearing large flowers with white petals and numerous large, yellow stamens. Found on abandoned farmland northeast of El Desemboque. It is rare in the undisturbed natural desert in the Seri Region. Medicine: to relieve kidney pain a tea was made from the leaves wrapped in cloth and steeped in water. This tea was also used to make a woman "lose bad blood" after parturition. Tea made from this plant was taken to cause expulsion of the remaining portion of a torn placenta. A medicinal tea made from this plant's leaves cooked in water with the inner bark from the root of Opuntia fulgida was taken for urinary problems, as a diuretic, and to "clear the urine". It was said to "rest" the kidneys and relieve the pain. "People of the Desert and Sea, Ethnobotany of the Seri Indians".

      Aphyllon cooperi  ( ) ( ) Orobanche cooperi Orobanchaceae The thick succulent stems appear in spring, and are parasitic on various species of Ambrosia . It occurs near El Desemboque and northward. Food: the people of the Libertad Region ate the "roots" (thickened base of the stem and inflorescence) after they were thoroughly cooked in ashes. "People of the Desert and Sea, Ethnobotany of the Seri Indians".

     Oenothera avita  ( ) ( ) Oenothera californica Onagraceae This winter-spring ephemeral has large white flowers which open at dusk and remain open through the morning on cool days. Generally found on sandy soils, it is common on dunes on the mainland and Tiburon Island. To the Seri it is the same as Abronia villosa except for the difference in flower color. Both species occur together on beach dunes and sandy soils. Girls brought home bouquets of the flowers which were tied together and hung from the walls of their huts. "People of the Desert and Sea, Ethnobotany of the Seri Indians".

    Eulobus californicus  ( ) ( ) Camissonia californica Onagraceae Winter-spring ephemeral, often very common across the desert floor on the mainland and Tiburon Island. Medicine: the flowers and leaves were cooked in water and used to wash the head as a remedy for falling hair and hair with split ends. "People of the Desert and Sea, Ethnobotany of the Seri Indians".

     Boerhavia erecta  (erect spiderling) ( ) Nyctaginaceae Summer-fall ephemeral, resembling B. coulteri but having flowers in tiny umbellate clusters. Some Seri said they were the same plant but that this had grown taller. Animal Food: the edible caterpillar of the sphinx moth ( Hyles lineata ) was said to be found more often on this plant than on other kinds of plants. Medicine: the stems were cooked in water, and the resulting tea taken to combat measles. "People of the Desert and Sea, Ethnobotany of the Seri Indians".

    Boerhavia coulteri  (spiderling) ( ) Nyctaginaceae A common summer-fall desert ephemeral; mainland and Tiburon and San Esteban islands. The small, pinkish flowers are on slender racemose inflorescences. The Seri said it is like tall hay, but with small leaves. Food: the green herbage was cooked, mashed and eaten. This was one of the few greens used by the Seri. Water Transport: it was one of several kinds of plants used to cover an olla to prevent water from splashing or spilling. "People of the Desert and Sea, Ethnobotany of the Seri Indians".