The current delimitation of Lachnaea L. and Cryptadenia Meisn. is base
d on the inflorescence morphology. In Lachnaea both indeterminate and
determinate inflorescences occur, whereas in Cryptadenia only determin
ate inflorescences are present. The indeterminate inflorescences in La
chnaea are capitate or umbellate. The determinate inflorescences in bo
th genera comprise a solitary, terminal flower. It is concluded that t
he two genera cannot be distinguished on inflorescence structure.