Figure 2.

Chloroplast and nuclear ribosomal sequencing depth (the average number of reads representing a given nucleotide) of the total dataset of 4604 freshly collected and silica gel dried material from the Alps and the Carpathians (“Silica gel”) and 2051 herbarium specimens from Norway and polar regions (“Herbarium”). (a) Effect of preservation methods on sequencing depth. (b) Sequencing depth in relation to complete assembly success for herbarium and silica gel dried material combined. Note that the y-axis is on a logarithmic scale.