Abstract: Preliminary cladistic analyses of the genus Burmannia were performed using different outgroups. Although results from different analyses were inconsistent in some aspects, some clades were found in both analyses, suggesting the specific relationships among species in these clades are well-solved. Of the two sections recognized by Jonker, sect. Foliosa is probably a monophyletic group, while sect. Burmannia is not. If the loss of chlorophyll is considered to be an irreversibleprocess, holo-mycoheterotrophism has very likely emerged only once in the tribe Burmannieae.

Key words: Burmannia, Burmanniaceae, Cladistic analysis, Mycoheterotroph, Mycoheterotro-