Examples of symbolism in "Milkweed" are angels and milkweed pods. Euploea is a genus of milkweed butterflies. Asclepias tuberosa, the butterfly weed, is a species of milkweed native to eastern North America. Larvae feed exclusively on milkweed and consume protective cardiac glycosides. They used fibers from Mountain dogbane, showy milkweed, wild grape, and soap plant for cordage. Some examples of forbs are clovers, sunflowers, daylilies, and milkweed. The larvae or caterpillar eats its egg case and begins to feed on milkweed. These include the sweet pea, soybean, alfalfa, milkweed, mustard, cabbage and poppy. The southern populations often consume "Asclepias curassavica," a tropical milkweed. Folk names include wart spurge, umbrella milkweed and madwoman's milk. Fibers from dogbane and milkweed were used to fashion yarns and baskets. Alternatively, native milkweed species are suggested for butterfly gardens. One policy that has been implemented is the mass planting of milkweed and nectar plants. All parts of common milkweed plants produce white latex when broken. Other seed fibers are from kapok and milkweed.