Asclepiad is a term that refers to any member of the family of plants that includes milkweed and swan plant. However, there are many other synonyms that also describe plants within this family. Some of these synonyms include Butterfly weed, Indian hemp, pleurisy root, and silkweed. Other common synonyms that refer to these plants include common milkweed, whorled milkweed, and Virginia silkweed. These plants are often used for their medicinal properties, and they have been known to treat conditions such as coughs, asthma, and bronchitis. Additionally, these plants are also a popular food source for many different species of butterflies and other insects.