Figure 1.

Physical map of two chloroplast genomes from Pogostemon plectranthoides (outer circle) and Pogostemon septentrionalis (inner circle). Genes inside the circle are transcribed clockwise and those outside are transcribed counterclockwise. The light gray inner circle corresponds to the AT content and the dark gray circle to the GC content. Genes belonging to different functional groups are shown in different colors. Asterisks indicate intron-containing genes.