Adiantum

noun

Ad·​i·​an·​tum ˌad-ē-ˈant-əm 

: a genus of ferns (family Polypodiaceae) with delicate palmately branched fronds comprising the maidenhair ferns and including two North American forms (A. pedatum and the Venus hair fern A. capillus-veneris) that have been used in the preparation of expectorants and demulcents