Maiden's hair or maidenhair can refer to:
Maiden's hair plant, any of several green seaweeds:
Maiden's hair plant, several species of the genus Chlorodesmis
Maiden's hair plant, several species of the genus Caulerpa
Maidenhair moss (Fissidens adianthoides), a species of moss
Maidenhair fern, several ferns of the genus Adiantum
Maidenhair spleenwort (Asplenium trichomanes), a species of fern
Maiden's hair tree or ginkgo (Ginkgo biloba)
