Funastrum heterophyllum  ( ) ( ) Sarcostemma cynanchoides Apocynaceae This is one of the few common vines in the Seri region. It is often encountered sprawiling over shrubs in floodplains, arroyos, and canyons. Flowers may be produced at various times of the year. Food: the flowers were picked and eaten fresh, often as a snack while walking through the desert. The flavor is faintly onion-like. Medicine: to cure a severe headache, the head was washed in a decoction of the branches and leaves. Tea made by brewing stems and leaves was taken for the bite of a black widow spider. Eye drops were made by cooking the roots in water. "People of the Desert and Sea, Ethnobotany of the Seri Indians".

      Asclepias albicans  ( ) ( ) Asclepiadaceae The Seri did not distinguish between this and A. subulata. A. albicans generally occurs on more arid sites than does A. subulata. A. subulata is the common reed-stem milkweed in the lowlands of the mainland and on Tiburon Islands; it is absent from San Esteban Island. A. albicans is infrequently encountered, and is usually found on exposed mountain slopes; however, it is common on San Esteban Island. A. albicans is taller than A. subulata   and there are significant floral differences. The stems of both species are slender, erect, and essentially leafless when mature. Adornment: the stems, with the bark removed, were cut into pieces approximately 1 cm in lenght. These pieces were stained blue or red, left natural, or toasted black in a pan filled with sand, sometimes with animal fat added to aid in the toasting. The beads were then strung for necklaces, often with Olivella shells. A special necklace pattern m...