Overview of Cranichis (Orchidaceae, Cranichidinae) and allied genera with notes on their Colombian representatives.

The diversity of the Neotropical subtribe Cranichidinae comprising mostly terrestrial orchids is still discussed by numerous taxonomists. The actual number of species classified in the genera of this group seems to be underestimated in the light of the recent revisions of the herbarium material. In this paper the taxonomic affinities of three controversial species considered as representatives of Cranichis: Pseudocranichis thysanochila, Ocampoa mexicana and Exalaria parviflora are discussed. Three new combinations, one within Pseudocranichis and two within Ocampoa are proposed. Results of the taxonomic revision of Colombian Cranichis are presented together with a key to the national representatives of the genus. [ABSTRACT FROM AUTHOR]