Phylogenetic tree reconstruction of Gastrodia using the maximum likelihood (ML) method based on chloroplast gene sequences of Gastrodia sp. nov. and 11 other species. Only the ML tree is shown, because its topology is nearly identical to that of the obtained BI tree. Numbers associated with the branches are BI posterior probabilities (PP) and ML bootstrap value (BS). The species name is followed by the accession number of the GenBank accession. D, Didymoplexis; E, Epipogium; G, Gastrodia.