Acianthus
 Acianthus is a small genus of 9 species 8 endemic in Australia and 1 in New Zealand from the orchid family (Orchidaceae). Previously there were more species included in Acianthus but about half of them have now been redistributed to other genera such as Acianthella.The name is derived from the Greek words achis (point) and anthos (flower) referring to the pointed sepals.