SUPPLEMENTARY MATERIALS
Table S1 Information of sampling sites of Cycas bifidaand C. micholitzii .
Figure S1 Morphological characteristics of Cycas bifida(a-e) and C. micholitzii (f-k). (a), (f): bifurcated pinna; B: female cone of C. bifida ; (c): wild plant of C. bifida ; (d): cultivated plant of C. bifida ; (e): male cone of C. bifida ; (g), (h): male plant of C. micholitzii ; (i), (j) and (k): wild plant of C. micholitzii .
Figure S2 Mismatch distribution of cpDNA and nuclear genes haplotypes based on pairwise sequence difference against the frequency of occurrence for Cycas bifida and C. micholitzii .