Table 1.

Basic information of plastid genomes used in this study

Species	Mean coverage	Length (bp)				GC Content (%)	No. vouchers specimen or NCBI accession
		Total	LSC	SSC	IR
Holcoglossum nujiangense_S1_S16	220	146,487	82,955	11,916	25,808	35.4	Jin Xiaohua 6930
Holcoglossum nujiangense_S5_S9	539	146,395	82,873	11,906	25,808	35.4	Jin Xiaohua 10,897
Holcoglossum weixiense	205	146,597	82,981	12,000	25,808	35.4	HK Kadoorie Program Team 3490
Holcoglossum sinicum	507	145,909	82,658	11,635	25,808	35.4	Jin Xiaohua 14,683
Holcoglossum flavescens _S2_S18	183	146,863	83,288	11,959	25,808	35.3	Jin Xiaohua 8943
Holcoglossum flavescens_S5_S10	489	146,763	83,188	11,959	25,808	35.4	Jin Xiaohua 15,165
Holcoglossum rupestre	75	147,163	83,575	11,936	25,826	35.3	Jin Xiaohua 9015
Holcoglossum quasipinifolium	131	147,063	83,440	12,079	25,772	35.4	JXH028
Holcoglossum lingulatum	151	146,525	83,713	11,274	25,769	35.5	Jin Xiaohua 9491
Holcoglossum nagalandensis	357	146,826	83,763	11,477	25,793	35.3	Jin Xiaohua 10,522
Holcoglossum amesianum	425	148,074	84,250	12,026	25,899	35.3	Jin Xiaohua 9419
Holcoglossum himalaicum	752	145,207	83,712	11,413	25,041	35.3	Jin Xiaohua 9496
Holcoglossum wangii	209	147,170	83,846	11,594	25,866	35.4	Jin Xiaohua 13,881
Holcoglossum subulifolium	360	146,930	83,398	11,802	25,865	35.5	Jin Xiaohua 13,614
Neofinetia falcata	_	146,497	83,809	11,775	25,456	35.3	NC_036372
Neofinetia richardsiana	_	146,498	83,809	11,775	25,457	35.3	NC_036373
Vanda brunnea	191	149,216	85,783	11,713	25,860	35.3	Jin Xiaohua 13,059